仙后座的明亮新星
2021年06月07日 A Bright Nova in Cassiopeia Image Credit & Copyright: Chuck Ayoub Explanation: What’s that new spot of light in Cassiopeia? A nova. Although novas occur frequently throughout the universe, this nova, known as Nova Cas 2021 or V1405 Cas, became so unusually bright in the skies of Ear […]