
Copernical Team
Advanced analysis of Apollo sample illuminates Moon's evolution, cooling

ExoMars discovers hidden water in Mars' Grand Canyon

To Seitah and Back

Locked in stone: Research may answer the question of Mars' missing water

NASA's Perseverance Mars Rover Makes Surprising Discoveries

NASA 'Fires Up' Artemis RS-25 Rocket Engines with New Components

NASA Completes Upper Part of Artemis II Core Stage

Launch of GeeSAT commercial satellites fails

Watching the blink of a star to size up asteroids for NASA's Lucy Mission

Gathering near Las Vegas recently, dozens of astronomers spread throughout the region, pointed their telescopes at the sky and waited for the moment on Oct. 20 that the light from a faraway star blinked out.
It was an event so miniscule it would have been easy to miss. Yet the data gathered in those few seconds will contribute to the success of NASA's Lucy mission, which launched from Cape Canaveral Space Force Station in Florida on Oct. 16.
The star appeared to briefly blink out because the asteroid Eurybates had passed in front of it. Eurybates is one of a handful of asteroids Lucy will visit over the next 12 years.
As Eurybates eclipsed the star, a phenomenon scientists call an "occultation," a 40-mile- (300-kilometer-) wide shadow the size of the asteroid passed over the region.
Astronomers spy quartet of cavities from giant black holes

Scientists have found four enormous cavities, or bubbles, at the center of a galaxy cluster using NASA's Chandra X-ray Observatory. This unusual set of features may have been caused by eruptions from two supermassive black holes closely orbiting each other.
Galaxy clusters are the largest structures in the universe held together by gravity. They are a mixture of hundreds or even thousands of individual galaxies, enormous amounts of hot gas, and unseen dark matter. The hot gas that pervades clusters contains much more mass than the galaxies themselves, and glows brightly in X-ray light that Chandra detects. An enormous galaxy is usually found at the center of a cluster.
A new Chandra study of the galaxy cluster known as RBS 797, located about 3.9 billion light-years from Earth, uncovered two separate pairs of cavities extending away from the center of the cluster.