红方块星云
2021年9月26日 The Red Square Nebula Image Credit & Copyright: Peter Tuthill (Sydney U.) & James Lloyd (Cornell U.) Explanation: How did a round star create this square nebula? No one is quite sure. The round star, known as MWC 922 and possibly part of a multiple star system, appears at the center of the Red Square Nebula. The featured image combines i...