Showing posts with label space exploration. Show all posts
Showing posts with label space exploration. Show all posts

Monday, February 6, 2012

Remembering Roger Boisjoly: He tried to stop the Challenger launch

Engineer Roger Boisjoly examines a model of the O-Rings, used to bring the Space Shuttle into orbit, at a meeting of senior executives and academic representatives in Rye, New York in September 1991. AP

I had the opportunity to see Roger Boisjoly speak at M.I.T. back in January 1987. The event got almost no promotion; I found out only because I had friends in the Aero/Astro program (Course 16). The controversy over the Strategic Defense Initiative, a.k.a. “Star Wars”, had been raging for a couple of years, and space tech had become politicized. (Full disclosure: yours truly was in AFROTC.) My impression was that the Boisjoly talk was not entirely approved by the M.I.T. administration.

In any case, the lecture hall was packed. Boisjoly related the events that led to the fatal decision to launch in spite of clear evidence against it. Here’s a summary of that talk: Roger Boisjoly on the Challenger Disaster.

A few moments stand out in my memory. When the VP of engineering said, “We need to take off our Engineering hats and put on our Management hats”; when his friend, at T+60, said, “We just dodged a bullet” and said a prayer of thanks; when Boisjoly hung his head and wept for a little while.

All of this made a big impression on a young electrical engineer, about business ethics, the government, and defense contracting. If faced with a similar ethical test, I always hoped that I’d be as courageous as Boisjoly.

By Howard Berkes
6 February 2012

Roger Boisjoly was a booster rocket engineer at NASA contractor Morton Thiokol in Utah in January, 1986, when he and four colleagues became embroiled in the fatal decision to launch the Space Shuttle Challenger.

Boisjoly was also one of two confidential sources quoted by NPR three weeks later in the first detailed report about the Challenger launch decision, and the stiff resistance by Boisjoly and other Thiokol engineers.

The experience both haunted and inspired Boisjoly in the decades that followed.

We learned this weekend from this story in The New York Times that Boisjoly died last month in Utah at age 73.

Bulky, bald and tall, Boisjoly was an imposing figure, especially when armed with data. He found disturbing the data he reviewed about the booster rockets that would lift Challenger into space. Six months before the Challenger explosion, he predicted "a catastrophe of the highest order" involving "loss of human life" in a memo to managers at Thiokol.

The problem, Boisjoly wrote, was the elastic seals at the joints of the multi-stage booster rockets. They tended to stiffen and unseal in cold weather and NASA's ambitious shuttle launch schedule included winter lift-offs with risky temperatures, even in Florida.

On 27 January 1986, the forecast for the next morning at the Kennedy Space Center included a launch-time temperature as low as 30 degrees Fahrenheit. NASA had never launched in temperatures that cold and Boisjoly and his four colleagues at Thiokol headquarters in Utah concluded it would be too dangerous to launch.

Three weeks later, he told NPR's Daniel Zwerdling in an unrecorded and confidential interview, "I fought like Hell to stop that launch. I'm so torn up inside I can hardly talk about it, even now."

But Boisjoly did talk about it in a hotel room in Alabama, revealing for the first time the details of that effort to keep Challenger on the launch pad. He asked that he not be named but he agreed to be quoted anonymously. As he spoke with Zwerdling, a second engineer revealed the same details to me under the same conditions at his home in Brigham City, Utah.

Boisjoly's family agreed to release him from our pledge of confidentiality so that his efforts to get the truth out can be widely known.

"We all knew what the implication was without actually coming out and saying it," a tearful Boisjoly told Zwerdling in 1986. "We all knew if the seals failed the shuttle would blow up." […]

Remembering Roger Boisjoly: He Tried To Stop Shuttle Challenger Launch

Sunday, July 17, 2011

No stranger to spaceships, New Mexico builds a spaceport

The San Andres Mountains and pieces of construction equipment are reflected in the glass windows of Spaceport America near Upham, N.M., in May. Despite construction delays and difficult working conditions in a remote area of the desert, state officials say New Mexico is committed to seeing the project succeed. Susan Montoya Bryan / AP

By Audie Cornish
17 July 2011

NASA's shuttle program ends when Atlantis comes back to Earth this week. It's not the end of American space exploration, however; it's the beginning of a new phase in commercial space travel.

For now, American astronauts will be hitching rides to the International Space Station on Russian Soyuz capsules. NASA and President Obama hope that won't be for long; they're counting on America's private sector to come up with a new way to get people, equipment and supplies into space.

That means there's a lot of money to be made in shuttling back and forth to the space station, and several companies are competing in a new race to space. Defense contractors like Boeing are in the game, as is Virgin Galactic — the private space tourism company owned by British business tycoon Richard Branson.

Whatever the new space vehicle is, it'll need a place to park. Enter Spaceport America, a company building a kind of airport for spaceships.

According to the people behind Spaceport America, the future of commercial space travel begins near the tiny New Mexican town of Truth or Consequences, where America's first commercial spaceport is under construction. Just outside of town, highway signs bear little yellow stickers in the shape of a rocket.

"It's kind of a mystery. We don't know who's putting those there," says David Wilson, spokesman for the state of New Mexico's Spaceport Authority. Really, he insists, it's not the spaceport.

On a 45-minute drive deep into the desert, miles of spiky grasses outline the horizon — interrupted by the occasional bison. The sky above is powder blue and clear of clouds. For decades, it's been the perfect place for pioneering rocket scientists.

"Robert Goddard brought his experiments and rockets to the New Mexican desert in the 30's for the same reasons," Wilson says. "There's this incredible weather window; there's no population out here, and then you're a mile up from sea level. We have a saying around there, 'The first mile of space is free.' It takes less energy to get to space from a place out here like this." […]

No Stranger To Spaceships, N.M. Builds A Spaceport

Friday, February 4, 2011

NASA finds Earth-size planet candidates in the habitable zone

Kepler's planet candidates as of Feb. 1, 2011. NASA / Wendy Stenzel

Is our Milky Way galaxy home to other planets the size of Earth? Are Earth-sized planets common or rare? NASA scientists seeking answers to those questions recently revealed their discovery.

"We went from zero to 68 Earth-sized planet candidates and zero to 54 candidates in the habitable zone - a region where liquid water could exist on a planet’s surface. Some candidates could even have moons with liquid water," said William Borucki of NASA’s Ames Research Center, Moffett Field, Calif., and the Kepler Mission’s science principal investigator. "Five of the planetary candidates are both near Earth-size and orbit in the habitable zone of their parent stars."

Planet candidates require follow-up observations to verify they are actual planets.

"We have found over twelve hundred candidate planets - that’s more than all the people have found so far in history," said Borucki. "Now, these are candidates, but most of them, I’m convinced, will be confirmed as planets in the coming months and years."

The findings increase the number of planet candidates identified by Kepler to-date to 1,235. Of these, 68 are approximately Earth-size; 288 are super-Earth-size; 662 are Neptune-size; 165 are the size of Jupiter and 19 are larger than Jupiter. Of the 54 new planet candidates found in the habitable zone, five are near Earth-sized. The remaining 49 habitable zone candidates range from super-Earth size -- up to twice the size of Earth -- to larger than Jupiter. The findings are based on the results of observations conducted May 12 to Sept. 17, 2009 of more than 156,000 stars in Kepler’s field of view, which covers approximately 1/400 of the sky.

"The fact that we’ve found so many planet candidates in such a tiny fraction of the sky suggests there are countless planets orbiting stars like our sun in our galaxy," said Borucki. "Kepler can find only a small fraction of the planets around the stars it looks at because the orbits aren’t aligned properly. If you account for those two factors, our results indicate there must be millions of planets orbiting the stars that surround our sun."

“We’re about half-way through Kepler’s scheduled mission," said Roger Hunter, the Kepler project manager. "Today’s announcement is very exciting and portends many discoveries to come. It’s looking like the galaxy may be littered with many planets.”

Among the stars with planetary candidates, 170 show evidence of multiple planetary candidates, including one, Kepler-11, that scientists have been able to confirm that has no fewer than six planets.

"Another exciting discovery has been the tremendous variations in the structure of the confirmed planets – some have the density of Styrofoam and others are denser than iron. The Earth's density is in between."

"The historic milestones Kepler makes with each new discovery will determine the course of every exoplanet mission to follow," said Douglas Hudgins, Kepler program scientist at NASA Headquarters in Washington. …

NASA Finds Earth-size Planet Candidates in the Habitable Zone

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Monday, December 20, 2010

Construction of the world’s largest neutrino observatory completed: Antarctica’s IceCube

Sensor descends down a hole in the ice as part of the final season of IceCube. Icecube is among the most ambitious scientific construction projects ever attempted. Credit: NSF / B. Gudbjartsson

ScienceDaily (Dec. 19, 2010) — Culminating a decade of planning, innovation and testing, construction of the world's largest neutrino observatory, installed in the ice of the Antarctic plateau at the geographic South Pole, was successfully completed Dec. 18, 2010, New Zealand time.

The last of 86 holes had been drilled and a total of 5,160 optical sensors are now installed to form the main detector -- a cubic kilometer of instrumented ice -- of the IceCube Neutrino Observatory, located at the National Science Foundation's Amundsen-Scott South Pole Station.

From its vantage point at the end of the world, IceCube provides an innovative means to investigate the properties of fundamental particles that originate in some of the most spectacular phenomena in the universe.

In the deep, dark, stillness of the Antarctic ice, IceCube records the rare collisions of neutrinos--elusive sub-atomic particles--with the atomic nuclei of the water molecules of the ice. Some neutrinos come from the sun, while others come from cosmic rays interacting with the Earth's atmosphere and dramatic astronomical sources such as exploding stars in the Milky Way and other distant galaxies. Trillions of neutrinos stream through the human body at any given moment, but they rarely interact with regular matter, and researchers want to know more about them and where they come from. …

Construction of the world's largest neutrino observatory completed: Antarctica's IceCube

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Monday, July 5, 2010

The microwave sky as seen by Planck space observatory

The Planck one-year all-sky survey. ESA / HFI / LFI consortia

Date: 05 Jul 2010
Satellite: Planck
Depicts: First year all-sky survey map
Copyright: ESA, HFI and LFI consortia

This multi-colour all-sky image of the microwave sky has been synthesized using data spanning the full frequency range of Planck, which covers the electromagnetic spectrum from 30 to 857 GHz.

The grainy structure of the CMB, with its tiny temperature fluctuations reflecting the primordial density variations from which the cosmic web originated, is clearly visible in the high-latitude regions of the map, where the foreground contribution is not predominant.

A vast portion of the sky, extending well above and below the galactic plane, is dominated by the diffuse emission from gas and dust in the Milky Way, which shines brightly at Planck's frequencies. While the galactic foreground hides the CMB signal from our view, it also highlights the extent of our Galaxy's large-scale structure and its emission properties.

Although the two main components of the microwave sky appear to be separable only in certain areas, an optimal foreground removal over the entire sky is possible thanks to sophisticated image analysis techniques, which have been developed by the Planck scientific teams. These techniques rely on the observatory's unique frequency coverage and the unprecedented accuracy of its measurements.

This image is derived from data collected by Planck during its first all-sky survey, and covers about 12 months of observations.

Note: Because of the manner in which all the channels have been combined to produce this image, the colours no longer represent accurately the brightness at each frequency. The angular resolution of this image has been reduced by a factor of around three from its sharpest rendition, to better match it to a typical viewing screen. For these and other reasons, this image is not suitable for scientific analysis.

The microwave sky as seen by Planck

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Monday, April 26, 2010

Location chosen for European Extremely Large Telescope

“So powerful it will be able to image directly rocky planets beyond our Solar System.”

The 5,500-tonne European Extremely Large Telescope (E-ELT) could be operating by 2018.  Image: ESO

By Jonathan Amos
Science correspondent, BBC News

Europe has chosen the place it wants to build the biggest telescope the world.

The observatory will be constructed on Cerro Armazones, a 3,000m-high mountain in Chile's Atacama Desert.

The E-ELT (European Extremely Large Telescope) will have a primary mirror 42m in diameter - about five times the width of today's best telescopes.

Astronomers say the next-generation observatory will be so powerful it will be able to image directly rocky planets beyond our Solar System.

It should also be able to provide major insights into the nature of black holes, galaxy formation, the mysterious "dark matter" that pervades the Universe, and the even more mysterious "dark energy" which appears to be pushing the cosmos apart at an accelerating rate.

Final go-ahead for the E-ELT is expected at the end of this year.

The European Southern Observatory (ESO) organisation which is managing the project says it hopes the telescope can be operational by 2018.

The estimated cost is in the region of a billion euros. …

Location chosen for European Extremely Large Telescope

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Tuesday, April 13, 2010

Nine new exoplanets found, some with retrograde and highly inclined orbits

Exoplanets, discovered by WASP together with ESO telescopes, that unexpectedly have been found to have retrograde orbits are shown here. In all cases the star is shown to scale, with its rotation axis pointing up and with realistic colours. The exoplanets are shown during the transit of their parent star, just before mid-transit. The last object at the lower right is for comparison and has a “normal” orbital direction. The size of each image is three solar diameters. (Credit: ESO / A. C. Cameron)

Astronomers have discovered nine new transiting exoplanets. Surprisingly, six out of a larger sample of 27 were found to be orbiting in the opposite direction to the rotation of their host star -- the exact reverse of what is seen in our own solar system.

"This is a real bomb we are dropping into the field of exoplanets," says Amaury Triaud, a PhD student at the Geneva Observatory who, with Andrew Cameron and Didier Queloz, leads a major part of the observational campaign.

Planets are thought to form in the disc of gas and dust encircling a young star. This proto-planetary disc rotates in the same direction as the star itself, and up to now it was expected that planets that form from the disc would all orbit in more or less the same plane, and that they would move along their orbits in the same direction as the star's rotation. This is the case for the planets in the Solar System.

After the initial detection of the nine new exoplanets [1] with the Wide Angle Search for Planets (WASP, [2]), the team of astronomers used the HARPS spectrograph on the 3.6-metre ESO telescope at the La Silla observatory in Chile, along with data from the Swiss Euler telescope, also at La Silla, and data from other telescopes to confirm the discoveries and characterise the transiting exoplanets [3] found in both the new and older surveys.

Surprisingly, when the team combined the new data with older observations they found that more than half of all the hot Jupiters [4] studied have orbits that are misaligned with the rotation axis of their parent stars. They even found that six exoplanets in this extended study (of which two are new discoveries) have retrograde motion: they orbit their star in the "wrong" direction. …

Turning planetary theory upside down: Nine new exoplanets found, some with retrograde orbits

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Saturday, February 13, 2010

Twilight of the Shuttle

From Bad Astronomy:

In a very unique setting over Earth's colorful horizon, the silhouette of the space shuttle Endeavour is featured in this photo by an Expedition 22 crew member on board the International Space Station, as the shuttle approached for its docking on Feb. 9 during the STS-130 mission. Image Credit: NASA 

The Shuttle Endeavour launched into orbit last week, blazing upward on its penultimate mission to the International Space Station. As it approached, astronauts onboard the now nearly-complete station snapped this dramatic photo of the Orbiter: …

Twilight of the Shuttle

Thursday, February 4, 2010

Hubble detects mysterious spaceship-shaped object traveling at 11,000 mph

Hubble has discovered a mysterious X-shaped object traveling at 11,000mph. NASA says that P/2010-A2 may be a comet, product of the collision between two asteroids. Or a Klingon Bird of Prey. Either way, UCLA investigator David Jewitt is excited:

This is quite different from the smooth dust envelopes of normal comets. The filaments are made of dust and gravel, presumably recently thrown out of the nucleus. Some are swept back by radiation pressure from sunlight to create straight dust streaks. Embedded in the filaments are co-moving blobs of dust that likely originated from tiny unseen parent bodies.

OK, David, we will believe you until Jerry Bruckheimer finish his next movie, in which a "comet" suddenly stops, turns to Earth, and starts firing anti-matter rays against our underpants.

The weirdest thing, however, is not only the prettyful X-shaped debris pattern, but the fact that its 460-foot-wide nucleus is outside the dust halo and separated from the trail. This behavior is something which has never been seen before in a comet or any other solar-system-swooshing object.

Hubble Detects Mysterious Spaceship-Shaped Object Traveling at 11,000MPH

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Thursday, January 21, 2010

Fermi smooths out space

From Bad Astronomy:

This news came out a little while ago but I didn’t cover it at the time, and it’s cool enough that it deserves to be covered. I got it from my friends with NASA’s Fermi satellite outreach group. I used to work on Fermi outreach before the satellite launched and was still called GLAST (Gamma-ray Large Area Space Telescope), and it was fun trying to come up with lesson plans and educational efforts based on gamma rays (the Hulk came up a lot).

Anyway, one thing Fermi can do is measure the exact time when high-energy gamma rays hit its detectors. Not too long ago, photons from a distant explosion slammed into Fermi, and it found that all these photons arrived essentially simultaneously from the event, irrespective of their energies.

So what? So, Einstein was right. Check it out for yourself:

Fermi smooths out space

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Saturday, December 19, 2009

The Known Universe

This should be required viewing for every human in the world, but fans of Powers of Ten will be especially tickled.

After hovering over Mount Everest and the gorges that plunge to the Ganges, you are pulled through the Earth’s atmosphere to glimpse the inky black of space over Tibet’s high desert. So begins The Known Universe, a new film produced by the American Museum of Natural History that is part of a new exhibition, Visions of the Cosmos: From the Milky Ocean to an Evolving Universe, at the Rubin Museum of Art in New York City.

The magic of this film, though, happens as the inky black expands. Pulling farther and farther from Earth, you see the deep blue of the Pacific give way to night as the Sun comes into focus, the orbits of the solar system shrink smaller and smaller, the constellations Sagittarius and Scorpio stretch and distort, and, as the Milky Way receeds, the spidery structure of millions of other galaxies come into view. Then, you reach the limit of the observable universe, the afterglow of the Big Bang. This light has taken more than 13.7 billion years to reach our planet, and you return, back to Earth, to two lakes that are nestled between Mount Kailash and Mount Gurla Mandhata in the Himalayas.

The structure of The Known Universe is based on precise, scientifically-accurate observations and research. The Hayden Planetarium at the American Museum of Natural History maintains the Digital Universe Atlas, the world’s most complete four-dimensional map of the universe. The Digital Universe started nearly a decade ago. It is continually updated and is the primary resource for production of the Museum’s Space Shows such as the current Journey to the Stars, and is used in live, real-time renderings for Virtual Tours of the Universe, a public program held on the first Tuesday of every month. Last year, some 30,000 people downloaded the Digital Universe to their personal computers, and the Digital Universe will soon be updated with a more accurate and user-friendly software interface. Digital Universe is licensed to many other planetariums and theaters world-wide. …

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Friday, December 18, 2009

Glint of sunlight confirms liquid in lake on Saturn's moon Titan

This image shows the first flash of sunlight reflected off a lake on Saturn's moon Titan. The glint off a mirror-like surface is known as a specular reflection. (Credit: NASA / JPL / University of Arizona / DLR)

ScienceDaily (Dec. 18, 2009) — NASA's Cassini Spacecraft has captured the first flash of sunlight reflected off a lake on Saturn's moon Titan, confirming the presence of liquid on the part of the moon dotted with many large, lake-shaped basins.

Cassini scientists had been looking for the glint, also known as a specular reflection, since the spacecraft began orbiting Saturn in 2004. But Titan's northern hemisphere, which has more lakes than the southern hemisphere, has been veiled in winter darkness.

The sun only began to directly illuminate the northern lakes recently as it approached the equinox of August 2009, the start of spring in the northern hemisphere. Titan's hazy atmosphere also blocked out reflections of sunlight in most wavelengths. This serendipitous image was captured on July 8, 2009, using Cassini's visual and infrared mapping spectrometer.

The image will be presented Friday, Dec. 18, at the fall meeting of the American Geophysical Union in San Francisco.

"This one image communicates so much about Titan -- thick atmosphere, surface lakes and an otherworldliness," said Bob Pappalardo, Cassini project scientist, based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "It's an unsettling combination of strangeness yet similarity to Earth. This picture is one of Cassini's iconic images." …

Glint of sunlight confirms liquid in lake on Saturn's moon Titan

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Tuesday, December 1, 2009

New study adds to finding of ancient life signs in Mars meteorite

partly filled pits

Using more advanced analytical instruments now available, a Johnson Space Center research team has reexamined the 1996 finding that a meteorite contains strong evidence that life may have existed on ancient Mars.

The new research focused on investigating alternate proposals for the creation of materials thought to be signs of ancient life found in the meteorite. The new study argues that ancient life remains the most plausible explanation for the materials and structures found in the meteorite.

In 1996, a group of scientists led by David McKay, Everett Gibson and Kathie Thomas-Keprta of NASA’s Johnson Space Center (JSC) in Houston published an article in Science announcing the discovery of biogenic evidence in the ALH84001 meteorite. A newly published paper revisits that original hypothesis with new analyses. The paper, “Origin of Magnetite Nanocrystals in Martian Meteorite ALH84001,” by Thomas-Keprta and coauthors Simon Clemett, McKay, Gibson and Susan Wentworth, all scientists in the Astromaterials Research and Exploration Science Directorate at JSC, is in the Nov. 1 issue of the journal Geochimica et Cosmochimica Acta of The Geochemical Society and The Meteoritical Society. …

New Study Adds to Finding of Ancient Life Signs in Mars Meteorite

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Monday, November 9, 2009

Uracil made in the lab under simulated space conditions

Stefanie Milam, Michel Nuevo and Scott Sandford. Credit: Dominic Hart / NASA

NASA scientists studying the origin of life have reproduced uracil, a key component of our hereditary material, in the laboratory. They discovered that an ice sample containing pyrimidine exposed to ultraviolet radiation under space-like conditions produces this essential ingredient of life.

Pyrimidine is a ring-shaped molecule made up of carbon and nitrogen and is the basic structure for uracil, part of a genetic code found in ribonucleic acid (RNA). RNA is central to protein synthesis, but has many other roles.

"We have demonstrated for the first time that we can make uracil, a component of RNA, non-biologically in a laboratory under conditions found in space," said Michel Nuevo, research scientist at NASA's Ames Research Center, Moffett Field, Calif. "We are showing that these laboratory processes, which simulate occurrences in outer space, can make a fundamental building block used by living organisms on Earth."

Scientists tested their hypotheses in the Ames Astrochemistry Laboratory. During their experiment, they exposed the ice sample containing pyrimidine to ultraviolet radiation under space-like conditions, including a very high vacuum, extremely low temperatures (approximately - 340 degrees Fahrenheit), and harsh radiation.

They found that when pyrimidine is frozen in water ice, it is much less vulnerable to destruction by radiation. Instead of being destroyed, many of the molecules took on new forms, such as the RNA component uracil, which is found in the genetic make-up of all living organisms on Earth.

“We are trying to address the mechanisms in space that are forming these molecules. Considering what we produced in the laboratory, the chemistry of ice exposed to ultraviolet radiation may be an important linking step between what goes on in space and what fell to Earth early in its development,” said Stefanie Milam, a researcher at NASA Ames and a co-author of the research paper. …

Uracil Made in the Lab

Friday, October 16, 2009

Mission finds bright ribbon at solar system border

This is the kind of surprising discovery that makes science so fun and rewarding.

A bright ribbon of hydrogen atoms marks the edge of the solar system, where the Sun's wind meets emissions from the rest of the galaxy, researchers reported on Thursday. They used telescopes aboard the orbiting Interstellar Boundary Explorer spacecraft or IBEX to look toward the heliopause, which is the boundary where solar wind meets galactic wind at the edge of the solar system beyond Pluto. REUTERS / Science / AAAS / Handout

WASHINGTON (Reuters) - A bright ribbon of hydrogen atoms marks the edge of the solar system, where the Sun's wind meets emissions from the rest of the galaxy, researchers reported on Thursday.

They used telescopes aboard the orbiting Interstellar Boundary Explorer spacecraft or IBEX to look toward the heliopause, which is the boundary where solar wind meets galactic wind at the edge of the solar system beyond Pluto.

Researchers combined images from IBEX with data from the Cassini spacecraft, which is near Saturn, and said it completely alters their ideas about what this border area looks like.

"The IBEX results are truly remarkable, with emissions not resembling any of the current theories or models of this never-before-seen region," David McComas of the Southwest Research Institute in San Antonio, Texas, who led the research, said in a statement. …

Glimpses of Solar System's edge

…Our Solar System is whipping around the centre of the galaxy. Just like a hand held out of a moving car, the Solar System feels a "wind" of particles from the region between our star and its nearest neighbours.

At the same time, the solar wind - a constant stream of fast-moving particles in all directions - blows outwards from the Sun.

The boundary at which the incoming and outgoing particles are at equivalent pressures, known as the heliopause, defines the heliosphere - the "bubble" in space generated by our own Sun's exhalations.

The true extent and shape of the heliosphere has been a subject of debate for more than half a century. Until now, the best clues came from the two Voyager spacecraft, which are believed to have passed through the heliopause at two different distances.

Through a process known as "charge exchange" at the heliosphere's edge, fast-moving neutral or uncharged particles are created, and it is these energetic neutral atoms or ENAs that the Ibex spacecraft aims to measure.

It orbits the Earth in a vast ellipse, gathering incoming ENAs flying back from the heliopause at a range of speeds.

What a number of researchers have found is that the flow of the ENAs is uneven, with a significantly higher flow in a "ribbon" across the sky. …

Mission finds bright ribbon at solar system border

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Tuesday, September 22, 2009

There is a lot of water on the Moon

Ooh, exciting!

Keith's note: Reliable sources report that there will be a press conference at NASA HQ at 2:00 pm this Thursday featuring lunar scientist Carle Pieters from Brown University.

The topic of the press briefing will be a paper that will appear in this week's issue of Science magazine wherein results from the Moon Mineralogy Mapper (M3) aboard Chandrayaan-1 will be revealed.

The take home message: there is a lot of water on the Moon.

Stay tuned.

There is A Lot of Water on the Moon

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Thursday, September 17, 2009

What does 3.6 million pounds of thrust look like?

It looks like this (action starts at 1:44):

That was the full up test of the Ares-1 solid rocket motor from last week. Last I heard, everything went pretty well. Now all we need to do is figure out if NASA will have a rocket to put it in.

What does 3.6 million pounds of thrust look like?

Thursday, August 6, 2009

Kepler sees an exoplanet

NASA's Kepler Mission Spies Changing Phases in a Distant World

"NASA's new exoplanet-hunting Kepler space telescope has detected the atmosphere of a known giant gas planet, demonstrating the telescope's extraordinary scientific capabilities. The discovery will be published Friday, Aug. 7, in the journal Science. The find is based on a relatively short 10 days of test data collected before the official start of science operations. Kepler was launched March 6, 2009, from Cape Canaveral Air Force Station in Florida. 

The observation demonstrates the extremely high precision of the measurements made by the telescope, even before its calibration and data analysis software were finished. "As NASA's first exoplanets mission, Kepler has made a dramatic entrance on the planet-hunting scene," said Jon Morse, director of the Science Mission Directorate's Astrophysics Division at NASA Headquarters in Washington. "Detecting this planet's atmosphere in just the first 10 days of data is only a taste of things to come. The planet hunt is on!" 

Kepler Sees an Exoplanet

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Friday, July 24, 2009

Hubble captures rare Jupiter collision

(ESA/Hubble Information Centre) The checkout and calibration of the NASA/ESA Hubble Space Telescope has been interrupted to aim the recently refurbished observatory at a new expanding spot on the giant planet Jupiter. The spot, caused by the impact of a comet or an asteroid, is changing from day to day in the planet's cloud tops. …

Hubble captures rare Jupiter collision

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