Mark McCaughrean
markmccaughrean
#OTD a year ago, I walked out of my office around 23:30 to ride home & was stunned by the display of noctilucent clouds overhead I took *a lot* of
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A Land of Ice & Dust A three-colour image of the surface of Comet 67P/Churyumov-Gerasimenko from 17km as seen by @Rosetta_OSIRIS NAC on 12 March 2016.Credit: ESA/Rosetta/MPS for OSIRIS team/Mark
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The iconic @nasa/@esa Hubble Space Telescope was launched 30 yrs ago today on the space shuttle Discovery. HST has made amazing scientific breakthroughs & inspired generations in ways many others
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So, who’s up for borrowing a trick from @esagaia & measuring the distance to Venus tonight as it glides past the Pleiades? Challenging, but may be possible. More in the
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