Subj : Daily APOD Report To : All From : Ben Ritchey Date : Fri Oct 26 2018 10:00:24 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. 2018 October 26 [2] IC 59 and IC 63 in Cassiopeia Image Credit & Copyright [3] : Ken Crawford [4] (Rancho Del Sol Obs. [5] ) Explanation: These bright rims and flowing shapes look ghostly on a cosmic scale. A telescopic view toward the constellation Cassiopeia [6] , the colorful (zoomable) skyscape [7] features the swept-back, comet-shaped clouds IC 59 (left) and IC 63. About 600 light-years distant, the clouds [8] aren't actually ghosts, but they are slowly disappearing under the influence of energetic radiation [9] from hot,luminous star gamma Cas. Gamma Cas [10] is physically located only 3 to 4 light-years from the nebulae, just off the top right edge of the frame. Slightly closer to gamma Cas, IC 63 is dominated by red H-alpha light emitted [11] as hydrogen atoms ionized by the star's ultraviolet radiation recombine with electrons. Farther from the star, IC 59 shows proportionally less H-alpha emission but more of the characteristic blue tint of dust reflected star light [12] . The field of view spans about 1 degree or 10 light-years at the estimated distance of gamma Cas and friends [13] . Tomorrow's picture: not easy being green ------------------------------------------------------------------------------- < [14] | Archive [15] | Submissions [16] | Index [17] | Search [18] | Calendar [19] | RSS [20] | Education [21] | About APOD [22] | Discuss [23] | > [24] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [25] (MTU [26] ) & Jerry Bonnell [27] (UMCP [28] ) NASA Official: Phillip Newman Specific rights apply [29] . NASA Web Privacy Policy and Important Notices [30] A service of: ASD [31] at NASA [32] / GSFC [33] & Michigan Tech. U. [34] ---------- Site notes: [1] archivepix.html [2] image/1810/IC59IC63crawford.jpg [3] lib/about_apod.html#srapply [4] http://www.imagingdeepsky.com/Contact.html [5] http://www.imagingdeepsky.com/ [6] ap160318.html [7] http://www.imagingdeepsky.com/Nebulae/IC59_IC63/ IC59_IC63.htm [8] http://iopscience.iop.org/1538-3881/129/2/954 [9] https://arxiv.org/abs/1809.01419 [10] https://www.aavso.org/vsots_gammacas [11] ap111013.html [12] ap091126.html [13] https://arxiv.org/abs/1705.04313 [14] ap181025.html [15] archivepix.html [16] lib/apsubmit2015.html [17] lib/aptree.html [18] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [19] calendar/allyears.html [20] /apod.rss [21] lib/edlinks.html [22] lib/about_apod.html [23] http://asterisk.apod.com/discuss_apod.php?date=181026 [24] ap181027.html [25] http://www.phy.mtu.edu/faculty/Nemiroff.html [26] http://www.phy.mtu.edu/ [27] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [28] http://www.astro.umd.edu/ [29] lib/about_apod.html#srapply [30] https://www.nasa.gov/about/highlights/HP_Privacy.html [31] https://astrophysics.gsfc.nasa.gov/ [32] https://www.nasa.gov/ [33] https://www.nasa.gov/centers/goddard/ [34] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .