ESA’s decade-long Milky Way Gaia mapping mission still has tons of data to release over the next few years. Expect surprises.

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

The European satellite, launched in 2013, has exhausted its gas reserves and is preparing to return to a stable orbit before being 'passivated.' But while the data collection that revolutionized ...

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

The Hubble Space Telescope has provided the most detailed survey of the Andromeda galaxy, revealing new clues about its ...

This stunning image of NGC 6951 is captured by NASA's Hubble Telescope. It is a barred spiral galaxy located in the constellation Cepheus. It is located at a distance of about 75 million light-years ...

Gaia was launched on December 19, 2013, and began scanning the stars in July 2014. It mapped over two billion stars, ...

The full image includes some 2.5 billion pixels compiled from observations spanning more than 1,000 orbits around Earth ...

Hubble's discovery of expanding galaxies confirmed the universe's vastness, laying the foundation for the Big Bang theory and ...

The Andromeda galaxy, our closest large galactic neighbor, is a treasure trove of stars and cosmic mysteries. Thanks to ...

About 100 years after astronomer Edwin Hubble's discovered the "magnificent" spiral nebula ... 2.5 million light-years away from the Milky Way. The observations recorded by Hubble yield new ...

Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they were independent galaxies, extremely large and distant. At the time ...