Astronomers struggle to learn about super-Earths – bigger than our Earth, smaller than Neptune – the most common type of planet found by the Kepler spacecraft.
After a long search at the solar systems’ fringes, scientists say they have three possible targets for the New Horizons spacecraft after its July 2015 Pluto flyby.
Earth’s atmosphere is leaking into space, too, but only very, very slowly. Meanwhile, Mars is thought to have lost much of its atmosphere already.
Australian astronomers say our Milky Way galaxy has only half the dark matter we thought it did. If so, it explains the shortage of Milky Way satellites.
Last volcanic activity on moon thought to be a billion years ago. Now small lava flows on moon’s dark plains suggest activity as recently as 50 million years ago.
The MESSENGER spacecraft, now orbiting Mercury, caught the images to make this movie of last Wednesday’s lunar eclipse. See Earth and moon from Mercury!
Next up … the Orionid meteor shower on the night of October 20-21. It’s a grand year for this shower!
Scientists using the Hubble Space Telescope have completed the first map of temperature and water vapor on a “hot Jupiter,” an exoplanet called WASP 43b.
Orionid meteor shower night of October 20-21. Comet Siding Spring just misses Mars on October 19. A partial solar eclipse on October 23. Plus Mars, Saturn, Mercury and Jupiter!