At 45, Nikku Madhusudhan has made the discovery of a lifetime. How did he know where to look? What else could these gas ...

This gas needs an enormous amount of energy to shine — more than normal stars can supply. The discovery, based on data from ...

From spellbinding images to groundbreaking scientific discoveries, we look back on some of Hubble's most exciting milestones.

Exactly 35 years ago this week, the Hubble Space Telescope was released from the Space Shuttle Discovery cargo hatch. Four new images prove it's still going strong.

The close alignment of Venus, Saturn, and a crescent moon created a formation resembling a smiling face during a rare cosmic event.

That’s us.’ From Pale Blue Dot (1994) by Carl Sagan. Photo courtesy NASA/JPL-Caltech But what, exactly, should we make of ...

The planetary parade will be most visible about 45 minutes before sunrise, when Mercury, Venus, and Saturn align in the eastern sky, near the crescent moon. Venus and Saturn will be the brightest and ...

In May 2020, astronomers observed a planetary engulfment for the first time that they believed was caused by a star expanding to become a red giant–swallowing an orbiting planet in the process.

In celebration of the 35th anniversary of the legendary space telescope’s launch, here are 35 of our favorite images it has ...

In its quest to chart the evolution of the universe, ESA’s space telescope has already amassed a massive catalog of galaxies ...