ScienceDaily: Astronomy News |
- Astronomers pinpoint 'Venus Zone' around stars
- Mysterious quasar sequence explained
- New observing capabilities for ALMA
- Bright clumps in Saturn ring now mysteriously scarce
- This star cluster is not what it seems: Messier 54 shows lithium problem also applies outside our galaxy
| Astronomers pinpoint 'Venus Zone' around stars Posted: 10 Sep 2014 06:41 PM PDT Astronomers have defined the 'Venus Zone,' the area around a star in which a planet is likely to exhibit the unlivable conditions found on the planet Venus. The research will aid Kepler astronomers searching for exoplanets, helping them determine which are likely to be similar to Earth and which are more likely to resemble Venus. |
| Mysterious quasar sequence explained Posted: 10 Sep 2014 10:25 AM PDT Quasars are supermassive black holes that live at the center of distant massive galaxies. They shine as the most luminous beacons in the sky by rapidly accelerating matter into their gravitationally inescapable centers. New work solves a quasar mystery that astronomers have been puzzling over for decades. It shows that most observed quasar phenomena can be unified with two simple quantities: how efficiently the hole is being fed, and the viewing orientation of the astronomer. |
| New observing capabilities for ALMA Posted: 10 Sep 2014 10:24 AM PDT The Atacama Large Millimeter/submillimeter Array (ALMA) has reached a major milestone by extending its vision fully into the realm of the submillimeter, the wavelengths of cosmic light that hold intriguing information about the cold, dark, and distant Universe. |
| Bright clumps in Saturn ring now mysteriously scarce Posted: 10 Sep 2014 07:20 AM PDT Compared to the age of the solar system -- about four-and-a-half billion years -- a couple of decades are next to nothing. Some planetary locales change little over many millions of years, so for scientists who study the planets, any object that evolves on such a short interval makes for a tempting target for study. And so it is with the ever-changing rings of Saturn. |
| Posted: 10 Sep 2014 05:33 AM PDT A new image from the VLT Survey Telescope at ESO's Paranal Observatory in northern Chile shows a vast collection of stars, the globular cluster Messier 54. This cluster looks very similar to many others but it has a secret. Messier 54 doesn't belong to the Milky Way, but is part of a small satellite galaxy, the Sagittarius Dwarf Galaxy. This unusual parentage has now allowed astronomers to use the Very Large Telescope (VLT) to test whether there are also unexpectedly low levels of the element lithium in stars outside the Milky Way. |
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