ScienceDaily: Astronomy News |
- NASA probe observes meteors colliding with Saturn's rings
- Einstein's gravity theory passes toughest test yet
- Entire galaxies feel the heat from newborn stars: Bursts of star birth can curtail future galaxy growth
- TRAPPIST participated in the detection of ten percent of all transiting exoplanets known to date
| NASA probe observes meteors colliding with Saturn's rings Posted: 25 Apr 2013 11:46 AM PDT NASA's Cassini spacecraft has provided the first direct evidence of small meteoroids breaking into streams of rubble and crashing into Saturn's rings. These observations make Saturn's rings the only location besides Earth, the moon and Jupiter where scientists and amateur astronomers have been able to observe impacts as they occur. Studying the impact rate of meteoroids from outside the Saturnian system helps scientists understand how different planet systems in our solar system formed. |
| Einstein's gravity theory passes toughest test yet Posted: 25 Apr 2013 11:22 AM PDT A strange stellar pair nearly 7,000 light-years from Earth has provided physicists with a unique cosmic laboratory for studying the nature of gravity. The extremely strong gravity of a massive neutron star in orbit with a companion white dwarf star puts competing theories of gravity to a test more stringent than any available before. |
| Posted: 25 Apr 2013 07:33 AM PDT Astronomers have shown for the first time that bursts of star formation have a major impact far beyond the boundaries of their host galaxy. These energetic events can affect galactic gas at distances of up to twenty times greater than the visible size of the galaxy -- altering how the galaxy evolves, and how matter and energy is spread throughout the Universe. |
| TRAPPIST participated in the detection of ten percent of all transiting exoplanets known to date Posted: 25 Apr 2013 07:32 AM PDT Among the many planets detected orbiting other stars (exoplanets) over the last twenty years, a little less than three hundred periodically pass in front of their star. This is what astronomers call a planetary transit. Exoplanets that "transit" their stars are key objects for the study of other planetary systems, because they are the only planets beyond our solar system that can be studied in detail, both in terms of their physical parameters (mass, radius, orbital parameters) and their atmospheric properties (thermal structure, dynamics, composition). |
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