Public domain
History of Chandra X-Ray Observatory
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
Chandra X-Ray Observatory took this first x-ray picture of the Andromeda Galaxy (M31) on October 13, 1999. The blue dot in the center of the image is a "cool" million-degree x-ray source where a supermassive black hole with the mass of 30-million suns is located. The x-rays are produced by matter furneling toward the black hole. Numerous other hotter x-ray sources are also apparent.
NASA Image and Video Library’s own descriptionCredit lineHistory of Chandra X-Ray Observatory. NASA/MSFC, 1999-10-13. Public domain. ID: 0002272.
