Just in time for Christmas, a vast star-forming region shaped like a Christmas tree is lighting up space 2,700 light-years ...

The NGC 2264 is a vast stellar complex located in the Monoceros constellation, about 2,600 light-years away. It includes two ...

The sheer observing power of the NASA/ESA Hubble Space Telescope is rarely better illustrated than in an image such as this. This glowing pink nebula, named NGC 248, is located in the Small Magellanic ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

The Milky Way is a barred-spiral galaxy about 100,000 light years in diameter, but only about 1,000 light years thick. It contains more than 100 billion stars, and some estimates place that number ...

An interstellar structure known as “God’s Hand” can be seen reaching across the cosmos toward a nearby spiral galaxy in stunning new images captured by the powerful Dark Energy Camera. The "cloudy, ...

Inside the bright but unassumingly named nebula Gum 55 lies a dark nebula — a rift of dust grains that absorb visible light — creating a swatch of darkness against the glow of bright gas. Fittingly ...

Summer in the Northern Hemisphere is a frustrating time for many amateur astronomers. The nights never get dark enough to easily see the faint, fuzzy galaxies and nebulae they enjoy looking at through ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known ...