For every galaxy that's visible from Earth, there are nine smaller ones that we can't see, even with all the technology we've ...

At about 950 times bigger than our Sun, Betelgeuse is one of the biggest stars in our Universe. But that comes with a price. Just like us, stars have a life expectancy, and Betelgeuse is no different.

Bigger than Hubble and launching as soon as 2029, the Lazuli Space Observatory would be the first-ever full-scale private ...

You can't see, feel, hear, taste or smell them, but tiny particles from space are constantly raining down on us.

Spencer Axani, assistant professor in the Department of Physics and Astronomy, is the inventor of CosmicWatch, a portable, ...

A spectacular supermoon and the first meteor shower of the new year will soon appear in the California night sky. The ...

New observations of a nearby red giant star suggest that a long-standing explanation for how giant stars spread life’s ...

Twinkle, twinkle, little star, how we wonder . . . well, where to even begin? How do stars form from gas and dust? Why do some stars go supernova? And what the heck is the "main sequence?" We brought ...

A research team led by Caltech may have just discovered the first-ever superkilonova, a cosmic phenomenon in which a star explodes twice in violently different ways. Their analysis of a series of ...

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Ursid shooting stars may be visible throughout the night on Dec. 21-22. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Don't miss the Ursid ...

Interstellar comet 3I/ATLAS made its closest approach to Earth on Friday, Dec. 19. The comet will pass within about 170 million miles of our planet and poses no danger. The comet is too faint to be ...