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Shrinking giants, exploding dwarves
08-28-2007 · EurekAlert!New, detailed observations of a supernova show evidence that a white dwarf star "fed" off a red giant to gain the critical mass needed for explosion.
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Keywords: shrinking, giants, exploding, dwarves, giant, dwarve
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- Gas giants jump into planet formation early
01-08-2007 · EurekAlert!
Gas-giant planets like Jupiter and Saturn form soon after their stars do, according to new research.
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- The fine line between stability and instability -- when do gas giants reach the point of no return?
12-05-2007 · EurekAlert!
Astronomers at UCL have identified the point at which a star causes the atmosphere of an orbiting gas giant to become critically unstable. Depending upon their proximity to a host star, giant Jupiter-like planets have atmospheres which are either stable and thin, or unstable and rapidly expanding. The research enables us to work out whether planets in other systems are stable or unstable by using a 3-D model to characterize their atmospheres.
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- Dust clouds in cosmic cycle
04-04-2007 · EurekAlert!
It has been a mystery for astronomers how certain dying stars have their colossal quantities of material blown out into the universe and shrink into objects called "white dwarves." This is the basis of a ground-breaking new theory by astrophysicists Anja C. Andersen from the Dark Cosmology Centre at the University of Copenhagen and Susanne Hцfner of the University of Uppsala.
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- Discovery of gamma rays from the edge of a black hole
10-27-2006 · EurekAlert!
H.E.S.S. discovers drastic variations of very-high-energy gamma rays from the central engine of the giant elliptical galaxy M 87.
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- The giant that turned out to be a dwarf
03-07-2007 · EurekAlert!
New data obtained on the apparent celestial couple, NGC 5011 B and C, taken with the 3.6-m ESO telescope, reveal that the two galaxies are not at the same distance, as was believed for the past 23 years. The observations show that NGC 5011C is not a giant, but a dwarf galaxy, an overlooked member of a group of galaxies in the vicinity of the Milky Way.
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- COROT discovers its first exoplanet and catches scientists by surprise
05-03-2007 · European Space Agency (ESA)
COROT has provided its first image of a giant planet orbiting another star and the first bit of 'seismic' information on a far away, Sun-like star- with unexpected accuracy.
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- Benchmark survey shows that giant outer extrasolar planets are rare
07-11-2007 · EurekAlert!
Astronomers who used powerful telescopes in Arizona and Chile in a survey for planets around nearby stars have discovered that extrasolar planets more massive than Jupiter are extremely rare in other outer solar systems.
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- Yale scientists make 2 giant steps in advancement of quantum computing
09-26-2007 · EurekAlert!
Two major steps toward putting quantum computers into real practice -- sending a photon signal on demand from a qubit onto wires and transmitting the signal to a second, distant qubit -- have been brought about by a team of scientists at Yale. The accomplishments are reported in sequential issues of Nature on Sept. 20 and Sept. 27, on which it is highlighted as the cover.
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- Arctic expeditions find giant mud waves, glacier tracks
12-12-2007 · EurekAlert!
Scientists gathering evidence of ancient ice sheets uncovered a new mystery about what's happening on the Arctic sea floor today. Sonar images revealed that, in some places, ocean currents have driven the mud along the Arctic Ocean bottom into piles, with some "mud waves" nearly 100 feet across.
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- Astronomers discover record 5th planet around nearby star 55 Cancri
11-06-2007 · EurekAlert!
A record-breaking fifth planet has been discovered around 55 Cancri, a yellowish star 41 lightyears from Earth and now the only known star apart from the Sun with 5 planets. The discovery implies that the star has more planets that are smaller than the gas giants found so far and possibly include a rocky, Earth-like planet, according to astronomers Geoff Marcy of UC-Berkeley and Debra Fischer of San Francisco State University.
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