ScienceDaily: Astronomy News |
- Quasars illuminate swiftly swirling clouds around galaxies
- Universe measured to one-percent accuracy: Most precise calibration yet of cosmic 'standard ruler'
- Many small exoplanets covered in gas: New measurements of mass expand knowledge of exoplanets' compositions
- Newly discovered celestial object defies categories: Is it a new kind of planet or a rare kind of failed star?
| Quasars illuminate swiftly swirling clouds around galaxies Posted: 08 Jan 2014 12:45 PM PST A new study of light from quasars has provided astronomers with illuminating insights into the swirling clouds of gas that form stars and galaxies, proving that the clouds can shift and change much more quickly than previously thought. |
| Universe measured to one-percent accuracy: Most precise calibration yet of cosmic 'standard ruler' Posted: 08 Jan 2014 12:44 PM PST The Baryon Oscillation Spectroscopic Survey (BOSS) is the largest component of the third Sloan Digital Sky Survey. BOSS has measured the clustering of nearly 1.3 million galaxies spectroscopically, determining the "standard ruler" of the universe's large-scale structure to within one percent. This is the most precise such measurement ever made and likely to be the standard for years to come. |
| Posted: 08 Jan 2014 10:33 AM PST NASA's Kepler space telescope discovered thousands of "planetary candidates," but what are the planets made of? To know this, each planet's mass first must be determined. An astronomer reports having measured the masses of approximately 60 exoplanets larger than Earth and smaller than Neptune. The measurements greatly expand scientists' knowledge of sub-Neptune exoplanets because once the mass and size of a planet are known, the density can be determined and the composition of the planet inferred. |
| Posted: 08 Jan 2014 08:27 AM PST An object discovered by astrophysicists nearly 500 light years away from the Sun may challenge traditional understandings about how planets and stars form. The object is located near and likely orbiting a very young star about 440 light years away from the Sun, and is leading astrophysicists to believe that there is not an easy-to-define line between what is and is not a planet. |
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