Seawater Holds Clues to Asteroid ImpactsMars Moon Seen Up CloseNew Super Earth is Smallest YetScientists Three Black Holes Can MergeSolar Wind Source FoundMassive Star Mystery Do They Explode Star Theory Gets New SpinMoon Seen as Laboratory for Lif: related news

Seawater Holds Clues to Asteroid ImpactsMars Moon Seen Up CloseNew Super-Earth is Smallest YetScientists: Three Black Holes Can MergeSolar Wind Source FoundMassive Star Mystery: Do They Explode?Star Theory Gets New SpinMoon Seen as Laboratory for Lif

Asteroids that strike Earth have cosmic origins, but clues to the size of ancient impactors now have come from a decidedly Earth-bound source: the chemistry of ancient seawater.

Mars Moon Seen Up CloseNew Super-Earth is Smallest YetScientists: Three Black Holes Can MergeSolar Wind Source FoundMassive Star Mystery: Do They Explode?Star Theory Gets New SpinMoon Seen as Laboratory for LifeSpacecraft Eyes Venus for Active Volcan

The Martian moon Phobos as seen by the Mars Reconnaissance Orbiter's HiRISE camera on March 23, 2008. Credit: NASA/JPL/University of Arizona

New Super-Earth is Smallest YetScientists: Three Black Holes Can MergeSolar Wind Source FoundMassive Star Mystery: Do They Explode?Star Theory Gets New SpinMoon Seen as Laboratory for LifeSpacecraft Eyes Venus for Active VolcanoesStudents to Take Com

Astronomers have discovered possibly the smallest extrasolar planet yet, a rocky world that's orbiting a star in the constellation Leo.

Missing Link Between Planets and Stars FoundSeawater Holds Clues to Asteroid ImpactsMars Moon Seen Up CloseNew Super-Earth is Smallest YetScientists: Three Black Holes Can MergeSolar Wind Source FoundMassive Star Mystery: Do They Explode?Star Theory

The difference between brown dwarfs and planets, based on conventional theory. Credit: Robert Roy Britt, SPACE.com.

Scientists: Three Black Holes Can MergeSolar Wind Source FoundMassive Star Mystery: Do They Explode?Star Theory Gets New SpinMoon Seen as Laboratory for LifeSpacecraft Eyes Venus for Active VolcanoesStudents to Take Command of Saturn ProbeSolar Tsuna

Three arrows indicate the positions of three quasars in this false-color composite taken by instruments at the Keck Observatory and Very Large Telescope. Credit: S. G. Djorgovski et al., Caltech and EPFL. Click to enlarge.

Intelligence: A Rare Cosmic CommodityMissing Link Between Planets and Stars FoundSeawater Holds Clues to Asteroid ImpactsMars Moon Seen Up CloseNew Super-Earth is Smallest YetScientists: Three Black Holes Can MergeSolar Wind Source FoundMassive Star

University of East Anglia Professor Andrew Watson developed a mathematical model showing that intelligent life is probably rare in the universe. Credit: Andrew Watson

Intelligence: A Rare Cosmic CommodityMissing Link Between Planets and Stars FoundSeawater Holds Clues to Asteroid ImpactsMars Moon Seen Up CloseNew Super-Earth is Smallest YetScientists: Three Black Holes Can MergeSolar Wind Source Found

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Lunar Science Community Needs Rebuilding, Researchers SayIntelligence: A Rare Cosmic CommodityMissing Link Between Planets and Stars FoundSeawater Holds Clues to Asteroid ImpactsMars Moon Seen Up CloseNew Super-Earth is Smallest YetScientists: Three

This still image was cut out from a moving image taken by the HDTV onboard the KAGUYA then sent to the JAXA Usuda Deep Space Center. The Moon's surface is near the South Pole, and you can Australia (center left) and Asia (lower right) on the Earth. (In this image, the upper side of the Earth is the Southern Hemisphere, thus the Australian Continent looks upside-down.) Credit: JAXA/NHK.

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Star Theory Gets New SpinMoon Seen as Laboratory for LifeSpacecraft Eyes Venus for Active VolcanoesStudents to Take Command of Saturn ProbeSolar Tsunamis Move at Astronomical SpeedsMid-Size Black Hole Answers Longstanding QuestionShooting Star Shower

The Small Magellanic Cloud features a young cluster, NGC346, with its many hot stars. Credit: A. Nota (ESA/STScI) et al., ESA, NASA

Stars Orbiting Close to Black Holes Flattened like Hot Pancakes

Playing with black holes is a risky business, especially for a star that is unlucky enough to be orbiting one. Assuming an unfortunate star hasn't already had all of its hydrogen fuel and other component elements stripped from its surface, the powerful tidal forces will have some fun with the doomed stellar body. First the star will be stretched out of shape and then it will be flattened like a pancake. This action will compress the star generating violent internal nuclear explosions, and shockwaves will ripple throughout the tormented stellar plasma. This gives rise to a new type of X-ray burst, revealing the sheer power a black hole's tidal radius has on the smaller binary sibling. Sounds painful…

Mid-Size Black Hole Answers Longstanding Question

Black holes can't be seen, but they're detected by noting their effects on stars or gas around them. They're so dense that nothing, including light, escapes them. Only two classes of black holes are firmly established to exist: Stellar black holes typically weigh a few times the mass of the sun; supermassive black holes are loaded with millions or billions of solar masses.

Coolest, Darkest Brown Dwarf Star Discovered

The coolest brown dwarf star has been discovered, with a surface temperature of 623 Kelvin (that's only 350 Celsius or 660 degrees Fahrenheit). Compare with the surface temperature of our Sun, a modest 6,000 Kelvin, you can see that this featherweight dwarf "star" is a little odd. As far as stars go, this one is pretty unspectacular, but it does hold a vast amount of interest. It may not be as sexy as a supernova or as exotic as a neutron star, the humble brown dwarf may provide the essential link between planets (specifically gas giants) and stars. They are effectively failed stars, and this new discovery demonstrates just how cold they can be…

X-Ray Flare Echo Reveals Supermassive Black Hole Torus

The light echo of an X-ray flare from the nucleus of a galaxy has been observed. The flare almost certainly originates from a single star being gravitationally ripped apart by a supermassive black hole in the galactic core. As the star was being pulled into the black hole, its material was injected into the black hole accretion disk, causing a sudden burst of radiation. The resulting X-ray flare emission was observed as it hit local stellar gases, producing the light echo. This event gives us a better insight to how stars are eaten by supermassive black holes and provides a method to map the structure of galactic nuclei. Scientists now believe they have observational evidence for the elusive molecular torus that is thought to surround active supermassive black holes.

Big Black Holes Cook Flambeed Stellar Pancakes

According to two astrophysicists from Paris Observatory, the fate of stars that venture too close to massive black holes could be even more violent than previously believed. Not only are they crushed by the black hole’s huge gravity, but the process can also trigger a nuclear explosion that tears the star apart from within. In addition, shock waves in the pancake star carry a brief and very high peak of temperature outwards, that could give rise to a new type of X-ray or gamma-ray bursts.

Will the Earth fry future moon astronauts?

Researchers working for NASA’s Lunar Reconnaissance Orbiter mission have discovered that the Earth’s magnetic tail could be harmful to future astronauts. The moon stays inside Earth’s ‘magnetotail’ for six days every month — during full moon. This can have consequences ranging from lunar ‘dust storms’ to strong electrostatic discharges, according to one researcher quoted by NASA in ‘The Moon and the Magnetotail.’ So far, this is pure speculation: no man has been on the moon when the magnetotail hits. As added the same scientist, ‘Apollo astronauts never landed on a full moon and they never experienced the magnetotail.’ But read more…

Holes in the Earth: 170 and CountingBeauty Shot: Moon Probe Catches Full EarthriseLunar Science Community Needs Rebuilding, Researchers SayIntelligence: A Rare Cosmic CommodityMissing Link Between Planets and Stars FoundSeawater Holds Clues to Astero

When a meteorite struck Earth before humans were around to watch, did it still make a "splat?" Although it's too late to witness the many pummelings our planet has already seen, scientists are still finding the humongous holes left here by long ago impacting space rocks.

Drifting Star Discovered: Implications For Star And Planet Formation Theory

By studying in great detail the 'ringing' of a planet-harbouring star, a team of astronomers using ESO's 3.6-m telescope have shown that it must have drifted away from the metal-rich Hyades cluster. This discovery has implications for theories of star and planet formation, and for the dynamics of our Milky Way.

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Meteorites Make a Big Splash on Mars: New Images of Secondary Craters by HiRISE

They look like pockmarks caused by shrapnel from a huge explosion. Actually they are surface features on Mars as seen by the High Resolution Imaging Science Experiment (HiRISE) on board the Mars Reconnaissance Orbiter (MRO). But what are they? They're not potholes formed by geological processes, they're not openings to ancient lava tubes, they are impact craters… but not like any impact crater you've seen before…

Black Hole Rips Apart Screaming StarAncient Asteroid Impact Coated Earth in Blanket of BeadsJupiter's Rings Made in the ShadeWhat Mars Fossils Might Look LikeKetchup Experiment Recovered from Columbia Crash

Artist's rendering of the light echo of a high-energy flash from a black hole. When a star is disrupted by a black hole in the nucleus of a galaxy, its debris is inevitably attracted and absorbed by the black hole. This sudden increase in the accretion rate causes an abrupt burst of ultraviolet and X-ray light because the gas from the disrupted star becomes very hot. As the high-energy radiation travels through the core of the galaxy it illuminates surrounding matter and so makes it possible to probe regions of the galaxy that would otherwise be unobservable. Credit: MPE/ESA

Spacecraft to Plunge Through Saturn Moon's Icy PlumeReal Death Star Could Strike EarthNearest Star System Might Harbor Earth TwinNASA Data Sheds Light on Early UniverseOnce-Habitable Lake Found on MarsBlack Hole Effect Created in LabSaturn's Moon Mig

An artist's illustration of the Cassini spacecraft as it makes its closest swing past a Saturnian moon on Mar. 12, 2008. Credit: NASA/JPL.

Seawater holds clues to asteroid impacts

Asteroids that strike Earth have cosmic origins, but clues to the size of ancient impactors now have come from a decidedly Earth-bound source: the chemistry of ancient seawater.

Seawater holds clues to ancient asteroid impacts

Asteroids that strike Earth have cosmic origins, but clues to the size of ancient impactors now have come from a decidedly Earth-bound source: the chemistry of ancient seawater.

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