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

For decades, we have been taught that the universe is expanding faster and faster. That belief has influenced our view of ...

Is there anything more dramatic than an exploding star? More than just extraordinarily bright, energetic events that can ...

This revelation means scientists might have to rethink Type II supernova models, which would result in some of these cosmic ...

Astronomers observed the fading light of supernova SN 2025kg, which followed the fast X-ray transient (FXT) named EP 250108a.

An artist’s illustration depicts silicon, argon and sulfur releasing from a massive star. - Adam Makarenko/W. M. Keck Observatory Astronomers have observed what they are calling a new type of ...

In November 1572, a brilliant new star appeared in the constellation Cassiopeia, shining so brightly that it was visible during the day. Danish astronomer Tycho Brahe carefully documented this ...

Portal Space Systems says that a rapid-maneuverability space vehicle called Starburst will leverage technologies it's already ...

Portal Space Systems says it will develop a highly maneuverable satellite bus, with a first flight planned for late 2026.

Bothell-based Portal Space Systems has introduced Starburst, an ESPA-class rapid-maneuverability spacecraft, and confirmed ...