Facts by Chandra X-Ray Observatory Center (18)
X-Ray Astronomy vs. Medical X-Rays
It's natural to associate the X-rays from cosmic objects with an X-ray from the doctor's office, but the…
A Giant X-Ray Machine
The first clear detection of X-rays from the giant, gaseous planet Saturn has been made with NASA's Chandra…
Binary and Multiple Star Systems
Stars, like people, are seldom found in isolation. More than 80% of all stars are members of multiple star…
Crab Nebula
For millions of years a star shone in the far off constellation of Taurus. So far away, and so faint that even…
Dark Matter Mystery
While carefully measuring the speed of rotation of galaxies, astronomers stumbled upon a profound cosmic…
Galaxy Cluster RDCS 1252.9-2927
A color composite image of the galaxy cluster RDCS 1252.9-2927 shows the X-ray (purple) light from…
Groups & Clusters of Galaxies
Galaxy clusters are the largest gravitationally bound objects in the universe. They have three major…
Introduction to Constellations
'Constellation' is the name we give to seeming patterns of starsin the night sky. 'Stella' is the Latin word…
Neutron Stars
Ordinary matter, or the stuff we and everything around us is made of, consists largely of empty space. Even a…
Powerful Quasars
Quasars appear as distant, highly luminous objects that look like stars. Strong evidence now exists that a…
Starburst, No, Not The Candy
A starburst galaxy is a galaxy experiencing a period of intense star forming activity. Although this activity…
Subrahmanyan Chandrasekhar
NASA's premier X-ray observatory was named the Chandra X-ray Observatory in honor of the late Indian-American…
The Chandra Mission
NASA's Chandra X-ray Observatory, which was launched and deployed by Space Shuttle Columbia on July 23, 1999,…
White Dwarfs
White dwarfs are among the dimmest stars in the universe. Even so, they have commanded the attention of…
X-ray Emissions From Comets
The X-ray emission from comets is produced by high-energy particles, but the high-energy particles come not…
X-Ray Images & False Color
The colors we see in the world around us are the result of the way that the human eye and brain perceive…
X-ray Telescopes
X-rays are a highly energetic form of light, not visible to human eyes. Light can take on many forms --…
X-Rays - Another Form of Light
A new form of radiation was discovered in 1895 by Wilhelm Roentgen, a German physicist. He called it…