Our sun is a lonely star. At least half the stars in our galaxy have binary companions. This was nicely illustrated in the ...

Astronomers are celebrating the completion of a 2.5-billion-pixel panoramic picture of the entire Andromeda Galaxy. The team includes several UC Santa Cruz researchers who made significant ...

If we could go back 101 years, we would encounter a time when scientists still thought the Milky Way was the entirety of our ...

This NASA/ESA Hubble Space Telescope image peers into the dusty recesses of the nearest massive star-forming region to Earth, ...

Jupiter's Great Red Spot storm, which usually appears dark-red, can be seen shining a lurid blue color in an ultraviolet ...

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the ...

The instrument, called the Prime Focus Spectrograph (PFS), features approximately 2,400 prisms scattered across the extremely wide field of view available at the Subaru Telescope’s primary focus, ...

"The question 'Are we alone?' is one of the most significant questions, not just in the history of science, but in the ...

How do images taken by the James Webb Space Telescope (JWST) appear so colorful, and where do the colors come from?

NASA's Nick Hague and Suni Williams will service the X-ray telescope attached to the ISS during a 6.5-hour-long spacewalk today (Jan. 16). Watch it live.

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous — and highly debated ...