The nebula is possibly being produced by a type of unstable star called a Wolf–Rayet star.
Two aging stars in the binary system AFGL 4106 sculpt a glowing, egg-shaped nebula as they approach the end of their lives.
A blood red moon anchors a month of planetary meetups, dark-sky delights, and improved chances to catch the northern lights around the spring equinox.
Looking for a sky event this week? Check out our full Sky This Week column. February 20: The Coma Star Cluster shines Head out after moonset this evening to chase down planetary nebula NGC 3242 in ...
Six planets will shine together in the evening sky on Feb. 28. Here's how to get the best view before they disappear.