HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

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First X-Rays from a Comet Discovered

ROSAT image of comet Hyakutake

GIF format with Comment Extension Block.

An X-ray image of Comet Hyakutake, as observed by the High Resolution Imager on the ROSAT X-ray observatory. The X-rays arise primarily from a crescent-shaped region with a diameter of about 50,000 km, on the sunlit side of the comet. The directions toward the sun and of the comet motion are indicated by the arrows. No X-ray emission is detected from the nucleus, marked by the "+" sign. The ellipse represents the instrument field of view, not the extent of the X-ray emission.

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