M any know the Great Orion Nebula (M42) in Orion's Sword as a bright diffuse nebula - a glowing cloud of cosmic gas illuminated by the Trapezium star cluster. But the Orion Nebula also has a dark ...

Spend three minutes getting lost in space. A video released by NASA this week shows the well-known Orion Nebula in a new way. The 3D visualization of the nebula allows the viewer to get a bird's ...

and there are stars in the Orion Nebula that are still forming today. Millions of years from now, future astronomers will record the wave of new stars passing deeper into the great molecular cloud ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...