a peak high above the San Gabriel Valley that is home to vital communication towers for the Los Angeles vicinity and the historic Mount Wilson Observatory. What happened next is a fire protection ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

The summit of Mount Wilson looms over Pasadena at about 5,715 feet, with the white domes of the observatory buildings and surrounding radio towers visible to drivers along Interstate 210 below.

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

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

In Eaton Canyon, a beloved hiking area, more than two dozen trails appear to have burned, including those leading to Millard ...

When the Eaton Fire flared up Jan. 9, flames producing heavy dark smoke climbed to the summit of Mount Wilson, a peak high ...