Jupiter and Saturn have gradually moved closer to each other over for months, and on December 21, the two worlds will be at their closest, around 1/5 of a full Moon apart. This is close enough that many telescopes may... Continue Reading →
One of the fundamental ideas of cosmology is that everything looks the same in all directions if you look over large enough distances. A new study using data from NASA’s Chandra X-ray Observatory and ESA’s XMM-Newton is challenging that basic... Continue Reading →
Our solar system's second known interstellar visitor doesn't seem to be in one piece anymore. Photos of the interstellar Comet Borisov taken by NASA's Hubble Space Telescope on March 28 and March 30 show an elongated nucleus that appears to have two... Continue Reading →
A stellar flare 10 times more powerful than anything seen on our sun has burst from an ultracool star almost the same size as Jupiter Coolest and smallest star to produce a superflare foundStar is a tenth of the radius... Continue Reading →
