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 ...

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

Over 2 decades of Chandra X-ray Observatory views of the Crab Nebula and Cassiopeia A have been time-lapsed. The Chandra team ...

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 ...

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 ...

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 ...

Images of stars released to the public, like the new image of Cassiopeia A revealed last month, fire the public’s imagination and kindle wonder in the breadth and beauty of the universe. But those ...

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 ...

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 ...

11,000 light-years away but only 340 years ago as seen on Earth, a massive star exploded in a supernova. This incredible explosion has left a set of rings of gas and dust, together forming a ...

Cassiopeia the Queen is climbing high in the northeast on late August evenings. The constellation’s familiar “W” or “M” shape seems propped up on one side, eternally (by human standards) facing the ...