ScienceDaily: Astronomy News |
- Comet discovered hiding in plain sight: Near-Earth asteroid is really a comet
- Spectrometer will help astrobiologists hunt for traces of Martian life
- Phaethon confirmed as rock comet by STEREO vision
| Comet discovered hiding in plain sight: Near-Earth asteroid is really a comet Posted: 10 Sep 2013 02:14 PM PDT For 30 years, a large near-Earth asteroid wandered its lone, intrepid path, passing before the scrutinizing eyes of scientists while keeping something to itself: (3552) Don Quixote, whose journey stretches to the orbit of Jupiter, now appears to be a comet. |
| Spectrometer will help astrobiologists hunt for traces of Martian life Posted: 10 Sep 2013 06:49 AM PDT An instrument similar to those used on Earth by art detectives and to sense explosives at airports will be taken into space for the first time by ExoMars, the European Space Agency's mission to Mars in 2018. This Raman spectrometer will help space scientists hunt for traces of Martian life. |
| Phaethon confirmed as rock comet by STEREO vision Posted: 10 Sep 2013 06:39 AM PDT The Sun-grazing asteroid, Phaethon, has betrayed its true nature by showing a comet-like tail of dust particles blown backwards by radiation pressure from the Sun. Unlike a comet, however, Phaethon's tail doesn't arise through the vaporization of an icy nucleus. During its closest approach to the Sun, researchers believe that Phaethon becomes so hot that rocks on the surface crack and crumble to dust under the extreme heat. |
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