Astronomers discovered a star that went supernova in 1954...then again in 2014. The lead author called it the biggest puzzle Ive encountered and recently participated in a roundtable discussion with experts in the field hosted by The Kavli Foundation.
Super Massive Black Holes by PHD Comics. Sagittarius A*, the super massive black hole at the center of the Milky Way, has a mass million times the mass of our sun, and a diameter equal to the distance between the sun and Mercury.
A dying star’s final moments are captured in this image from the Hubble Space Telescope. The death throes of this star may only last mere moments on a cosmological timescale, but this star’s demise is still quite lengthy by our standards, lasting tens of
Astronomy Picture of the Day - Jan. 2013 - In the Center of the Trifid Nebula - Clouds of glowing gas mingle with dust lanes in the Trifid Nebula - Image Credit: Subaru Telescope (NAOJ), Hubble Space Telescope, Martin Pugh;
A newly released image from the La Silla Observatory shows the reflection nebula IC 2631 from the light of star HD HD 97300 is a very young star 500 light-years from Earth in the southern constellation of Chamaeleon.