Cascade PBS helps your community explore new worlds and ideas through programs that educate, inform and inspire. Your tax-deductible donation helps make it all possible.

Yet for a period of about 30 years in the late 19th century, a significant portion of the country operated on Allegheny Standard Time or the Allegheny Time System, as measured at the Observatory.

On January 25th, a rare planetary alignment will grace the night sky, featuring Mercury, Venus, Mars, Jupiter, and Saturn ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. November’s full ...

Asteroids, comets, and meteors are all small solar system objects, but they differ in composition and behaviour.

Reaching a maximum brightness of -12.92 magnitude, it's hard to miss as it boldly takes center stage and washes out any celestial object ... eight craters and their coordinates to help you locate ...

Check out our gallery below for a look at the best celestial treats of this year's Halloween season. On Oct. 2, an annular solar eclipse was visible for many parts of the Pacific Ocean ...

The Max Planck Institute for Extraterrestrial Physics (MPE) researchers used data from the eROSITA All-Sky Survey.

After hours: November 19 at 4:20 PM EST ...

Most of us never need to use numerical GPS coordinates to take advantage of the many location-based services that are available to us. We simply input an address, or click through ...