Subj : Daily APOD Report To : All From : Ben Ritchey Date : Wed Apr 10 2019 08:08:24 Astronomy Picture of the Day Astronomy Picture of the Day Discover the cosmos! [1] Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2019 April 10 Martian Moon Phobos Crosses the Sun Video Credit: NASA [2] , JPL-Caltech [3] , MSSS [4] , Curiosity Rover [5] Explanation: What's that passing in front of the Sun? It looks like a moon, but it can't be Earth's Moon [6] , because it isn't round. It's the Martian moon Phobos [7] . The featured video [8] was taken from the surface of Mars [9] late last month by the Curiosity rover. Phobos [10] , at 11.5 kilometers across, is 150 times smaller than Luna [11] (our moon) in diameter, but also 50 times closer to its parent planet [12] . In fact, Phobos [13] is so close to Mars [14] that it [15] is expected to break up and crash into Mars [16] within the next 50 million years. In the near term, the low orbit of Phobos [17] results in more rapid solar eclipses than seen from Earth [18] . The featured video [19] has been sped up -- the actual transit took about 35 seconds. A similar video [20] was taken of Mars' smaller and most distant moon Diemos [21] transiting the Sun. The videographer -- the robotic rover Curiosity [22] -- continues to explore Gale crater [23] , most recently [24] an area with stunning vistas and unusual rocks [25] dubbed Glen Torridon [26] .. Retrospective: Previous APODs that appeared on April 10 [27] . Tomorrow's picture: open space ------------------------------------------------------------------------------- < [28] | Archive [29] | Submissions [30] | Index [31] | Search [32] | Calendar [33] | RSS [34] | Education [35] | About APOD [36] | Discuss [37] | > [38] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [39] (MTU [40] ) & Jerry Bonnell [41] (UMCP [42] ) NASA Official: Phillip Newman Specific rights apply [43] . NASA Web Privacy Policy and Important Notices [44] A service of: ASD [45] at NASA [46] / GSFC [47] & Michigan Tech. U. [48] ---------- Site notes: [1] archivepix.html [2] https://www.nasa.gov/ [3] https://www.jpl.nasa.gov/ [4] http://www.msss.com/ [5] https://mars.nasa.gov/msl/ [6] https://solarsystem.nasa.gov/moons/earths-moon/overview/ [7] https://solarsystem.nasa.gov/moons/mars-moons/phobos/in-depth/ [8] https://www.jpl.nasa.gov/news/news.php?release=2019-057 [9] ap131208.html [10] https://en.wikipedia.org/wiki/Phobos_(moon) [11] ap180604.html [12] ap160529.html [13] ap181125.html [14] ap101201.html [15] ap110124.html [16] https://solarsystem.nasa.gov/planets/mars/overview/ [17] ap151122.html [18] https://solarsystem.nasa.gov/planets/earth/overview/ [19] https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA23133 [20] https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA23134 [21] https://solarsystem.nasa.gov/moons/mars-moons/deimos/in-depth/ [22] https://mars.nasa.gov/msl/mission/rover/ [23] https://en.wikipedia.org/wiki/Gale_(crater) [24] https://www.youtube.com/watch?v=e-gZpz8zuDQ [25] http://redplanet.asu.edu/?p=33395 [26] http://redplanet.asu.edu/?p=32727 [27] http://asterisk.apod.com/viewtopic.php?t=28248 [28] ap190409.html [29] archivepix.html [30] lib/apsubmit2015.html [31] lib/aptree.html [32] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [33] calendar/allyears.html [34] /apod.rss [35] lib/edlinks.html [36] lib/about_apod.html [37] http://asterisk.apod.com/discuss_apod.php?date=190410 [38] ap190411.html [39] http://www.phy.mtu.edu/faculty/Nemiroff.html [40] http://www.phy.mtu.edu/ [41] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [42] http://www.astro.umd.edu/ [43] lib/about_apod.html#srapply [44] https://www.nasa.gov/about/highlights/HP_Privacy.html [45] https://astrophysics.gsfc.nasa.gov/ [46] https://www.nasa.gov/ [47] https://www.nasa.gov/centers/goddard/ [48] http://www.mtu.edu/ --- Mystic BBS v1.12 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .