Delta Cephei helps measure cosmic distances

The 6th batch of the Pentagon UAP files has just been released. Read about a U.S. Air Force talk on UAP from 1952, see more videos and more. The post 6th batch of Pentagon UAP files: Air Force talk and more first appeared on EarthSky.

The Great Square of Pegasus consists of 4 stars of nearly equal brightness in a large square pattern. It's a great jumping-off point for star-hopping. The post Great Square of Pegasus gallops into the autumn sky first appeared on EarthSky.

A newly identified South American tiger cat is the first cat species discovered in a century. revealing more diversity among tiger cats than previously known. The post Scientists discover a new tiger cat hiding in plain sight first…

In 2024, a space rock slammed into the moon, creating a new crater in the surface. The newly formed moon crater is about 728 feet wide and 141 feet deep. The post Newly formed moon crater is once-in-a-century discovery first appeared on…

International Observe the Moon Night is September 19, 2026. It's a global event for celebrating the moon. Here's how you can participate online or in person. The post International Observe the Moon Night 2026 is September 19 first appeared…

ESA has unveiled a spectacular new Webb image. One of the largest shots yet, it features protostars, jets, distant spiral galaxies and a gravitational lens. The post Huge new Webb image is chock-full of space delights first appeared on…

A high school teacher discovered 4 footprints that make up the 1st-ever known T. rex trackway. He discovered it at Hell Creek Formation in North Dakota. The post 1st adult T. rex trackway found by high school teacher first appeared on…

The September equinox is almost here! Autumn for the Northern Hemisphere. Spring for the Southern Hemisphere. Here's all you need to know. The post 2026 September equinox: All you need to know first appeared on EarthSky.