A new image taken with the NASA/ESA Hubble Space Telescope provides a detailed look at the tattered remains of a supernova explosion known as Cassiopeia A (Cas A) – the youngest known remnant from a ...

The James Webb Space Telescope has captured new imagery of supernova remnant Cassiopeia A. It is 11,000 light-years away in ...

The James Webb Space Telescope has captured new imagery of supernova remnant Cassiopeia A. It is 11,000 light-years away in ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

One of the most famous objects in the sky — the Cassiopeia A supernova remnant — will be on display like never before, thanks to NASA’s Chandra X-ray Observatory and a new project from the Smithsonian ...

The explosion of a star is a dramatic event, but the remains the star leaves behind can be even more dramatic. A new mid-infrared image from NASA’s James Webb Space Telescope provides one stunning ...

The inner nebula of the much-studied supernova Cassiopeia A is not moving smoothly outward. This has been discovered by astronomers from the University of Amsterdam and Harvard. The astronomers ...

Some 350 years ago, the dodo bird went extinct, Sir Isaac Newton invented calculus, and Cassiopeia A (Cas A) burst into existence. Cassiopeia A is supernova remnant that originally formed when a star ...

The many sides of the supernova remnant Cassiopeia A. Located 10,000 light-years away in the northern constellation Cassiopeia, Cassiopeia A is the remnant of a once massive star that died in a ...

Ten thousand years ago, a star exploded. Now scientists are getting their best look ever at the details of that explosion, Cassiopeia A. Space-age tools and methods are allowing them to glimpse ...

An unseen obstacle in the cloud of gas around a supernova remnant 11,000 light years away is making the supernova’s blast waves lopsided, according to two recent studies. Two teams of astrophysicists ...

There’s something new and bright lurking in the night sky — and you can see it in your backyard. An amateur astronomer in Japan recently discovered a nova in the constellation Cassiopeia involving a ...