(CNN) - NASA released a new image of the youngest supernova remnant in our galaxy, called Cassiopeia A, or Cas A. It was taken by the James Webb Space Telescope. This is the closest and most detailed ...

Astronomers from the George Washington University (GWU) in Washington, DC, and elsewhere have employed NASA's Chandra X-ray ...

In November 1572, a brilliant new star appeared in the constellation Cassiopeia, shining so brightly that it was visible during the day. Danish astronomer Tycho Brahe carefully documented this ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Astronomers have taken a fresh look at an old ...