The NASA probe Juno successfully enters orbit around Jupiter. Its mission: unravel mysteries, explore how the gas giant formed, uncover the secrets of its violent storms -- and glimpse the origin of our Solar System.
NASA's Juno probe has been orbiting the largest planet on our Solar System, the gas giant Jupiter, since July 4, 2016. As the February 2017 closest-to-the-planet flyby approaches, what secrets has its moon, Juno, revealed thus far and how has a simple valve altered a decade of planning?
2017 • Astronomy
Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity. They’re young, and evaporate over time, their stars let loose to roam space freely. Globular clusters, on the other hand, are larger, have hundreds of thousands of stars, and are more spherical. They’re very old, a significant fraction of the age of the Universe itself, and that means their stars have less heavy elements in them, are redder, and probably don’t have planets (though we’re not really sure).
3,000- years-old, the Nebra Sky Disk is the oldest sky map in the world, predating Babylonian and Egyptian sky maps. Found in Germany, the Nebra Sky Disk is an archaeological mystery. Who were the people who designed this beautiful and functional ancient artifact with exact proportions?