Since Galileo first observed them through his telescope in the early 1600s, sunspots have fascinated scientists.

Here's everything to know about the James Webb Space Telescope, and what it captured on its three-year anniversary observing ...

Astronomers have constructed telescopes of every kind - massive observatories designed to pick up faint traces of light across space.

June 22 marks the 350th anniversary of the Royal Observatory Greenwich, the home of the historic Prime Meridian that is considered by many to be the birthplace of modern astronomy. To celebrate, we're ...

Dr. Caitlin Casey, an observational astronomer, has recently joined the physics department at UC Santa Barbara. She co-leads the C.O.S.M.O.S. collaboration — a project distinguished by its deep ...

Hubble Space Telescope's 35th anniversary: See NASA's new out-of-this-world images The Hubble Space Telescope, launched 35 years ago, has blown our minds with its striking images of far-away ...

The most powerful solar telescope in the world has recorded a major milestone atop an active volcano in Hawaii, capturing a detailed image of a cluster of sunspots with the telescope’s new ...

Later this year, astronomers will start filming an unprecedented 10-year movie of the southern sky, using a brand-new and super-powerful telescope facility in Chile.

The Hubble Space Telescope is celebrating its 35th anniversary in space today, but even as a senior citizen in the spacecraft population, it is showing no sign of slowing down.

Hidden deep in an archive in New Jersey is the world's oldest living bond. It's gearing up for its 400th birthday and still paying interest.

Russia has lost control of its only space radio telescope but officials are working to re-establish communication, the country's beleaguered space agency said Monday.