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

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

The only possibility left was an extraordinary one: a tidal disruption event, or TDE.

The most massive stars in the universe are destined to explode as brilliant supernova before collapsing into black holes. Yet ...

The enormous outburst was likely caused by an unfortunate star venturing too close to a supermassive black hole ...

How did the extremely massive stars (EMS) in the early universe help form the oldest star clusters? This is what a recent ...

For several decades, evidence has suggested that the expansion of the universe is accelerating. Crucial to those estimates were the use of standard candles, celestial events of the same luminosity ...

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

Portal Space Systems, a Bothell-based startup, aims to harness the power of the sun to propel spacecraft, making it easier to ...

A ‘superflare’ 10 trillion times brighter than the Sun is confirmed as the record-holder for both luminosity and distance.

As the collapsed core of a massive star, a neutron star is a small but incredibly dense object, packing up to three times the ...

NASA's Chandra X-ray Observatory and Hubble Space Telescope confirmed the existence of a companion star orbiting Betelgeuse, ...