Right #now Chandra is gazing at a #galaxy in Centaurus! Nearby in the sky, fierce ultraviolet radiation from a remnant star is causing the surrounding gas to glow like a fluorescent sign, advertising the presence of planetary nebula NGC 3918.
Right #now Chandra is observing Comet C/2019 Y4 ATLAS. Discovered in December 2019, the #comet recently fragmented, disappointing sky watchers who were hoping it would be visible to the unaided eye later this spring. C/2019 Y4 ATLAS is about 8 light minutes from Earth #today.