Did Ancient Supernovas Change Earth’s Climate?

Supernovas are some of the most powerful and energetic events in the entire Universe. When a dying star explodes you wouldn’t want to be anywhere nearby—fresh elements are nice and all, but the energy and radiation from a supernova would roast any planets within tens if not hundreds of light-years in all directions. Luckily for us…

Space Cell

I don’t usually post images from outside our solar system here on LITD, but this one was too good not to share! NASA’s Chandra X-ray observatory made this image of the Tycho supernova remnant, an object in our Milky Way galaxy about 13,000 light years from Earth, in the constellation Cassiopeia. In visible light it…