The Discovery of Y Dwarfs Using Data from the Wide-field Infrared Survey Explorer (WISE)

We present the discovery of seven ultracool brown dwarfs identified with the Wide-field Infrared Survey Explorer (WISE). Near-infrared spectroscopy reveals deep absorption bands of H_2O and CH_4 that indicate all seven of the brown dwarfs have spectral types later than UGPS J072227.51-054031.2, the latest type T dwarf currently known. The spectrum of WISEP J182831.08+265037.8 is […]

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Seasonal Flows on Warm Martian Slopes

Short story: We have taken repeat images of dark flows at several sites on Mars using the Mars Reconnaissance Orbiter’s (MRO) High Resolution Imaging Science Experiment (HiRISE) camera. These features extend down slope from bedrock outcrops and appear to lengthen during warm seasons and fade in cold seasons. Flows recur over periods of months (to […]

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