HST celebrated its 36th birthday in space with a detailed look at the famous Trifid Nebula (M20), a dusty stellar nursery.

The young, bright open cluster NGC 7243 rides high in the sky late tonight, located in the zig-zagging constellation Lacerta.

As the seasons change, Venus shines bright, Neptune contrasts in color with a nearby star, and Mercury passes Spica in the sky this week.

Our satellite skims past the bright red giant star Antares at the heart of Scorpius. Check them out in the south after sunset.

Uncover various deep-sky objects you can see this fall using a large telescope, including the Bubble Nebula (NGC 7635), the ...

Triangulum is a small but easy-to-spot constellation in the evening and morning sky, hosting one of the closest galaxies to our own.

Air Force Secretary Troy Meink's announcement is the first official U.S. acknowledgment of space-based weapons.

The ethereal zodiacal light, also called the false dawn, shines before sunrise in the eastern sky this morning.

Europe's Vega C lifts a pair of Earth-observation satellites from French Guiana, China targets five launches, and Russia ...

Bars can form in any galaxy with ordered rotation; it is primarily the quantity of dark matter that controls whether a bar is present.

The Moon, Venus, Spica, and Mercury now all stand in a line tonight, but only if you’re quick — Mercury sets soon after the ...