Caltech’s Katie Bouman explains how the Event Horizon Telescope Collaboration captured the first imager of the Sagittarius A* ...

The sounds aren't just a scientific curiosity, though. The tenuous gas and plasma that drifts between the galaxies in galaxy ...

Einstein was a great thinker who made plenty of mistakes—errors that sometimes led to more meaningful discoveries in physics, ...

Black holes could soon help us understand dark matter. These extreme objects, long considered light traps, are now becoming observational tools. Through finer analysis of their images, ...

It’s possible that these objects might be the primordial beginnings of the supermassive black holes found in the centers of ...

The giant elliptical galaxy Messier 87 (M87), in the constellation Virgo, possesses near its center a supermassive black hole ...

If there is one star that serves to announce the arrival of fall as the leaves have begun to turn, unquestionably that title ...

Comets SWAN and Lemmon, both discovered this year, have arrived near Earth from the outer region of the solar system.

A pairing-off of the brightest planet and a slender crescent moon will be the chief celestial attraction in the dawn sky ...

Skywatchers can catch a rare glimpse of Comet Lemmon this month, and it won't be back until around the year 3175. Here's how ...

Beginning Monday afternoon, comet Lemmon will pass about 56 million miles from Earth, while comet Swan will soar even closer, ...

Skywatchers will witness a rare event as the Moon, Mars, and Mercury appear close together in the twilight sky this October.