星系与彗星
2023年10月20日 Galaxies and a Comet Image Credit & Copyright: Dan Bartlett Explanation: Galaxies abound in this sharp telescopic image recorded on October 12 in dark skies over June Lake, California. The celestial scene spans nearly 2 degrees within the boundaries of the well-trained northern constellation Canes Venatici. Prominent at the upper left 23.5 m...