Shows > X-Ray the Sky: Chandra's Cosmos

White Dwarf Smash-Up Ignited Our Galaxy's Most Recent Supernova | Video

Occurring about 110 year;s ago (Earth time) the blast that produced remnant G1.9+0.3 was likely triggered by a white dwarf merger, Chandra X-ray observers have found. The mechanisms matter because astronomers use such Type 1a events to judge cosmological distances.

X-Ray the Sky: Chandra's Cosmos

credit : NASA/CXC/A. Hobart