StarDate Online 11 Feb 2018, 06:00 UTC Many wonderful astronomical objects are visible to the eye alone — from the Moon to the Andromeda Galaxy. But binoculars add a whole new layer to our view of the universe. They’re especially good at revealing star clusters — families of stars that are packed close together. An example is M48. It’s in the southeast this evening, well to the left of sparkling Sirius, the brightest star in the night sky.
NASACast Audio 9 Feb 2018, 13:30 UTC Episode 31 features Jonathan Homan, Project Manager for Webb's Chamber A Testing, who talks about how the James Webb Space Telescope has been designed, built, and tested, especially in the vacuum chamber here at the Johnson Space Center. He also describes what the telescope will be looking for in the universe and how it will work. This episode was recorded on January 25, 2018.
StarDate Online 8 Feb 2018, 06:00 UTC he ancient rivalry between Mars and Antares comes from their resemblance. Mars reminded ancient skywatchers of the color of blood, so they named the planet for the god of war: Ares in Greece, and Mars in Rome. Since the heart of the scorpion looked so much like Mars, it was called Ant-Ares, which means rival of Ares or, in the Roman version, rival of Mars.
NASACast Audio 7 Feb 2018, 14:51 UTC Does art imitate life or does life imitate art? In the season one finale of Gravity Assist, NASA’s Jim Green and bestselling author Andy Weir explore the fascinating intersection of science and science fiction. Green and Weir delve into biggest surprises about Mars and the Moon, what every aspiring writer needs to know, and how “The Martian” provided a powerful gravity assist for young readers.
SpaceTime with Stuart Gary 7 Feb 2018, 09:02 UTC Astronomers have discovered evidence confirming that the outer halo of the Milky Way contains stars stolen from neighbouring dwarf galaxies. The new findings support the idea of galactic cannibalism in which big galaxies grow bigger by merging or consuming smaller galaxies.
StarDate Online 6 Feb 2018, 06:00 UTC The surface of Earth is constantly changing. On small scales, the changes are caused by wind, rain, and flowing water. On a large scale, though, they’re caused by the motions of Earth’s crust. New crust is created on the ocean floor, where molten rock pushes up from the mantle, the layer below the crust. And old crust disappears as one plate plunges below another, pushing its rock back into the mantle. A similar process may be at work on Europa, one of the big moons of Jupiter. In that case, though, the plates are made of ice.