Subj : Daily APOD Report To : All From : Ben Ritchey Date : Tue Nov 20 2018 06:32:02 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. 2018 November 20 The Unexpected Trajectory of Interstellar Asteroid 'Oumuamua Image Credit: NASA [2] , JPL [3] , Caltech [4] Explanation: Why is 'Oumuamua differing from its expected trajectory? Last year, 1I/2017 U1 'Oumuamua [5] became the first known asteroid from interstellar space to pass through our Solar System [6] . Just over a year ago, this tumbling interstellar rock even passed rather close to the Earth [7] .. The asteroid's future path should have been easy to predict given standard gravity -- but 'Oumuamua's [8] path has proven to be slightly different. In the featured animation [9] , 'Oumuamua is shown approaching and exiting the vicinity of our Sun [10] , with the expected gravitational and observed trajectories labelled. The leading natural hypothesis [11] for this unexpected deviation is internal gas jets becoming active on the Sun-warmed asteroid [12] -- but speculation [13] and further computer simulations [14] are ongoing. 'Oumuamua [15] will never return, but modern sky monitors [16] are expected to find and track similar interstellar asteroids [17] within the next few years. Tomorrow's picture: high swirls on jupiter ------------------------------------------------------------------------------- < [18] | Archive [19] | Submissions [20] | Index [21] | Search [22] | Calendar [23] | RSS [24] | Education [25] | About APOD [26] | Discuss [27] | > [28] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [29] (MTU [30] ) & Jerry Bonnell [31] (UMCP [32] ) NASA Official: Phillip Newman Specific rights apply [33] . NASA Web Privacy Policy and Important Notices [34] A service of: ASD [35] at NASA [36] / GSFC [37] & Michigan Tech. U. [38] ---------- Site notes: [1] archivepix.html [2] https://www.nasa.gov/ [3] https://www.jpl.nasa.gov/ [4] http://www.caltech.edu/ [5] ap171122.html [6] https://solarsystem.nasa.gov/solar-system/our-solar-system/overview/ [7] ap070325.html [8] https://en.wikipedia.org/wiki/%CA%BBOumuamua [9] https://youtu.be/fdfD-Bj2RBE [10] https://solarsystem.nasa.gov/solar-system/sun/overview/ [11] https://www.jpl.nasa.gov/news/news.php?feature=7280 [12] http://adsabs.harvard.edu/abs/2018AJ....156..261T [13] http://adsabs.harvard.edu/abs/2018nova.pres.4232K [14] http://www.tnmoc.org/sites/default/files/styles/lightbox/public/ WITCHpeople_0.jpg?itok=j0rfGux7 [15] https://photojournal.jpl.nasa.gov/catalog/PIA22357 [16] https://cneos.jpl.nasa.gov/about/search_program.html [17] https://www.nasa.gov/planetarydefense/faq/interstellar [18] ap181119.html [19] archivepix.html [20] lib/apsubmit2015.html [21] lib/aptree.html [22] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [23] calendar/allyears.html [24] /apod.rss [25] lib/edlinks.html [26] lib/about_apod.html [27] http://asterisk.apod.com/discuss_apod.php?date=181120 [28] ap181121.html [29] http://www.phy.mtu.edu/faculty/Nemiroff.html [30] http://www.phy.mtu.edu/ [31] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [32] http://www.astro.umd.edu/ [33] lib/about_apod.html#srapply [34] https://www.nasa.gov/about/highlights/HP_Privacy.html [35] https://astrophysics.gsfc.nasa.gov/ [36] https://www.nasa.gov/ [37] https://www.nasa.gov/centers/goddard/ [38] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .