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

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

Moving at roughly 20,505 miles per hour along the distant world's equator, it’s the fastest known jet stream that wraps ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

Circa 1945: Astronomer Dr. Edwin Powell Hubble sitting in a chair at a desk reading a journal. A staff member at Mt. Wilson ...

Edwin Hubble's discovery of the expanding universe transformed cosmology, revealing countless galaxies and laying the ...

The long-closed, 1920s-era observatory in Lake Angelus is important to astronomy buffs. But its private ownership has ...

For humans, the most important star in the universe is our sun. The second-most important star is nestled inside the ...

The key NASA center remains under a mandatory evacuation order, but officials say both it and Mount Wilson are protected for ...

and home of the famed Mount Wilson Observatory. The live camera in Santa Monica, California can be moved to show Santa Monica Beach, Palisades Park, or the famed Santa Monica Pier. The live camera ...

Here are all the wildfires burning in Southern California at a glance.