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| Keywords: Chandra Image Gives First Look at Mars Emitted X-Rays DVIDS850072.jpg en Giving scientists their first look Chandra observed x-rays produced by fluorescent radiation from oxygen atoms of the Sun in the sparse upper atmosphere of Mars about 120 kilometers 75 miles above its surface The x-ray power detected from the Martian atmosphere is very small amounting to only 4 megawatts comparable to the x-ray power of about ten thousand medical x-ray machines At the time of the Chandra observation a huge dust storm developed on Mars that covered about one hemisphere later to cover the entire planet This hemisphere rotated out of view over the 9-hour observation but no change was observed in the x-ray intensity indicating that the dust storm did not affect the upper atmosphere Scientists also observed a halo of x-rays extending out to 7 000 kilometers above the surface of Mars believed to be produced by collisions of ions racing away from the Sun the solar wind NASA Identifier MSFC-0301104 2009-11-19 Glenn Research Center https //www dvidshub net/image/850072 850072 2013-02-08 14 03 WASHINGTON D C US PD-USGov X-ray equipment Images from DoD uploaded by Fæ | ||||
