Star trails streak above the Mayall 4-meter Telescope, in a long-exposure photo taken at Kitt Peak National Observatory southwest of Tucson. New research using the 52-year-old telescope has led to ...

New evidence suggests the universe might not behave as expected, raising questions about the costs of being wrong.

Everything in space – from the Earth and Sun to black holes – accounts for just 15% of all matter in the universe . The rest ...

Located on 200 acres of the Tohono O'odham Reservation about 55 miles southwest of Tucson, Kitt Peak National Observatory was created with the approval of and an agreement signed by the nation ...

Milky Way arcs over Kitt Peak National Observatory | Space photo of the day for June 16, 2025 . By Kenna Hughes-Castleberry published 16 June 25 The view of our home galaxy lit up the night sky at ...

Featuring never-before-seen views of galaxies and more than 2,100 newly discovered asteroids, the observations are only a ...

Vera Cooper grew up gazing at the night sky from the window of a D.C. townhouse in the 1930s, when her teachers told the ...

Rubin Observatory begins 10-year sky survey to uncover dark matter, track asteroids, and build a detailed view of our ...

The Vera C. Rubin Observatory was conceived nearly 30 years ago, and now we are finally seeing the first images captured by ...

Skywatchers can catch a rare conjunction of the moon and Mars on June 29, appearing as a reddish "cherry" near a crescent ...

June 25's new moon darkens the night sky for summer’s best stargazing — including the Summer Triangle and Milky Way.

For recent Nogales High School graduate Derek Campa, it's clear that the bicultural aspects of Nogales have shaped his life ...