Visit site
  • Sharon Souther

    Best NASA Photos Of The Week

  • Teresa Tieben

    Cas A: Optical and Xray

  • Harry Covair

    Cas A: Optical and X-ray Image Credit: X-ray - NASA, JPL-Caltech, NuSTAR; Optical - Ken Crawford (Rancho Del Sol Obs.) The aftermath of a cosmic cataclysm, supernova remnant Cassiopeia A (Cas A) is a comfortable 11,000 light-years away. Light from the Cas A supernova, the death explosion of a massive star, first reached Earth just 330 years ago. Still expanding, the explosion's debris cloud spans about 15 light-years near the center of this composite image.

Related Pins

See Explanation. Clicking on the picture will download the highest resolution version available.

N11: Star Clouds of the LMC - Astronomy Picture of the Day, 11 February 2013

See Explanation. Clicking on the picture will download the highest resolution version available.

See Explanation. Clicking on the picture will download the highest resolution version available.

Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602.

~~Supernova Remnant Cassiopeia A (NASA, Chandra) ~ for the first time, a multiwavelength three-dimensional (3-D) reconstruction of a supernova remnant has been created. This stunning visualization of Cassiopeia A (Cas A), the result of an explosion approximately 330 years ago by NASA's Marshall Space Flight Center~~

A Halo for NGC 6164 Image Credit & Copyright: Don Goldman Explanation: Beautiful emission nebula NGC 6164 was created by a rare, hot, luminous O-type star, some 40 times as massive as the Sun. Seen at the center of the cosmic cloud, the star is a mere 3 to 4 million years old. In another three to four million years the massive star will end its life in a supernova explosion. Spanning around 4 light-years, the nebula itself has a bipolar symmetry.

Messier 9 , a cluster of stars 25,000 light years away toward the central bulge of our galaxy, made up of suns about twice as old as ours. We are so far away that they seem too close to each other not to collide. But, they are actually very far apart from each other.

Galaxies don't normally look like this. NGC 6745 actually shows the results of two galaxies that have been colliding for only hundreds of millions of years. Just off the above digitally sharpened photograph to the lower right is the smaller galaxy, moving away. The larger galaxy, pictured above, used to be a spiral galaxy but now is damaged and appears peculiar. Gravity has distorted the shapes of the galaxies.

The Crab Nebula, the violently out-rushing debris from a star that exploded a millennium ago. via The Bad Astronomer