The stars are surrounded by swirls of gas, which look like pine needles of an evergreen tree. They are green because they represent the light in the visible spectrum, according to NASA.

That Rich was presenting the story of Edwin Hubble at the January 2025 AAS meeting was symbolic, for it was at the 33rd ...

Officially called NGC 2264, the "Christmas tree cluster" is located about 2,500 lightyears Earth in our own Milky Way galaxy. The grouping of stars, whose ages are between about one and five ...

within the Milky Way galaxy. This composite image, below, shows an animated version of the Christmas Tree Cluster where its blue and white X-ray lights blink: This composite image shows the ...

It's in the Milky Way galaxy, located some 2,500 light-years from Earth. The Christmas tree image combines Chandra data (red, purple, blue, and white) with optical data (green and violet ...