Barnard b is one of the nearest exoplanets at only 6 light-years away. But its host star is dim. Can life find a way on such a cold planet? Astronomers probe for answers.
AT2018cow - aka the Cow - erupted in or near a galaxy some 200 million light-years away. It's become one of the most intensely studied astronomical events in history. Read more and see a video.
What was it?One group argues it was a monster black hole shredding a passing star. The other argues it might have been a black hole being born. Image via Sloan Digital Sky Survey.
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Yes, it will. The red star Betelgeuse will run out of fuel, collapse under its own weight, and then rebound in a spectacular supernova explosion. Someday ... but probably not soon. How to see Betelgeuse in your sky. Photo by Thomas Wildoner.
