Astronomers are proposing that an early-warning system be built to warn us a week in advance should an asteroid be heading our way.
The telescope in an airplane flew its first observation mission today.
There are more stars in heaven and earth than have been dreamt of by scientists, three times more it turns out. And they are all dwarves!
Cassini pinpoints the hot spots in the cracks on Enceladus.
How one astronomer became the unofficial exoplanet record keeper.
Jupiter’s south equatorial stripe appears to be reappearing.
The struggle to find $1.5 billion to save NASA’s astrophysics budget as well as the overbudget James Webb Space Telescope. Note that this article once again allows a variety of NASA managers and scientists push the false story that Webb is a replacement for Hubble. It is not. Hubble looks at the universe mostly in optical wavelengths, as our eyes do. Webb will be an infrared telescope. It will do wonderful things, but different things than Hubble.
The numbering ain’t really that precise, but today scientists announced the discovery of the 500th extrasolar planet.
Scientists are once again debating whether Pluto really is a planet.
A glimpse at the universe before the Big Bang?
It came from another galaxy.
Astronomer and comet/asteroid tracker Brian Marsden has died. Marsden was the kind of gentleman that makes writing astronomy articles so much fun. Even when I was a newby science writer back in the early 90s he was always willing to answer any of my questions, and give me blunt and honest answers to boot. R.I.P.
The dying stars that look like jellyfish.
Astronomers have identified a dozen new binary star systems, where the two stars are tiny white dwarfs. Of even more interest is that a half dozen are spiraling into each other and will eventually merge, the ensuing collision likely producing a supernova explorsion.
Scientists have exhumed the body of Danish astronomer Tycho Brahe in order to do a new autopsy.
The James Webb Space Telescope is in trouble again, requiring an addition $1.5 billion and an additional year to get finished.
The uncertainty of science! Eris, the distant planet in the Kuiper belt, had been thought to be larger than Pluto. Now astronomers have doubts.
The superEarth orbiting the red dwarf star Gliese 581 in its habitable zone does exist, according to a preprint paper published today on the Los Alamos astro-ph website.
The telescope that ate astronomy. My just finished Sky & Telescope article (expected out early next year) covers some of the same ground, describing how the cost overruns on the James Webb Space Telescope has badly damaged much of NASA’s space astronomy budget, for this and possibly the next two decades.
Astronomers have discovered the most massive neutron star ever, twice the mass of the Sun and far heavier than any theory had ever predicted.
Buckyballs, or carbon molecules called fullerenes, have been discovered all throughout the Milky Way as well as in another galaxy.
Scientists released additional Kepler results [pdf] today, this time describing what they are learning about the stars being observed rather than any planets that might be orbiting them. In studying each star’s minute variations of light, the astronomers can track how the star itself is oscillating like a bell ringing. From this they can do a kind of stellar seismology, finding out a great deal about what is going on inside the star. The data has thus:
Hubble data used to look 10,000 years into the future.
Using a deep field image taken by the Hubble Space Telescope, astronomers at the European Southern Observatory have identified one galaxy in that image as the most distant ever seen, with a record-setting redshift of 8.6 and thus an rough distance of about 13 billion light years, only about 600 million years after the Big Bang.
Whoops! Last sentence corrected, thanks to my readers.
Despite its age (20 plus years), the Hubble Space Telescope continues to produce amazing images. The mosiac below shows the beautiful pinwheel galaxy NGC 3982. From the caption:
NGC 3982 is located about 68 million light-years away in the constellation Ursa Major. The galaxy spans about 30,000 light-years, one-third of the size of our Milky Way galaxy. . . .The arms are lined with pink star-forming regions of glowing hydrogen, newborn blue star clusters, and obscuring dust lanes that provide the raw material for future generations of stars. The bright nucleus is home to an older population of stars, which grow ever more densely packed toward the center.
Using the Hubble Space Telescope over the last ten months, astronomers have tracked the decaying aftermath of a possible asteroid collision. Key quote:
Astronomers think a smaller rock, perhaps 10 to 15 feet wide, slammed into the larger one. The pair probably collided at high speed, about 11,000 mph, which smashed and vaporized the small asteroid and stripped material from the larger one. Jewitt estimates that the violent encounter happened in February or March 2009 and was as powerful as the detonation of a small atomic bomb.
The image sequence below, taken from the original paper describing the discovery [pdf], shows the slow changes that have occurred since January. At the moment scientists do not have an satisfactory explanation for the nucleus’s X-shaped pattern in the earliest images.
The uncertainty of science: The extrasolar planet discovered orbiting Gliese 581 in its habitable zone might not exist, according to other scientists.
