Marvel At The Sparkling, Spiraling Majesty Of The M100 Galaxy

Messier 100, or M100, is a grand design spiral galaxy that contains over 100 billion stars. This Hubble Space Telescope image was made in 2009, but there's even more history here; look carefully for the "small spot that is a light echo from a bright supernova that was recorded years before the image was taken." » 2/14/15 4:45pm 2/14/15 4:45pm

Shockwaves Are Driving This Galaxy To Its Imminent Doom

This galaxy looks like our own Milky Way, except for a pair of spiral arms emerging out of the galactic plane. That one anomaly is enough to radically change the evolution of NGC 4258, as powerful jets are generating shockwaves driving gas right out of the galaxy and slowing star growth to a crawl. » 9/10/14 1:03am 9/10/14 1:03am