The X-ray Sky

The viewer works just like Google Maps: drag the mouse to pan and use the scroll wheel to zoom. Made with Google Sky, which uses a combination of optical observations from the Sloan Digital Sky Survey and the Hubble Space Telescope. The green disks indicate X-ray sources observed with the All-Sky Monitor (ASM) on-board the Rossi X-ray Timing Explorer. The size of a disk represents roughly the average brightness of the source during the past decade. Click on a green disk to see a graph of the brightness of the source over the past year. You can also view the X-ray stars in Google Earth.