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 January 13
[2]
Tycho's Supernova Remnant in X-ray
Image Credit: NASA [3] / CXC [4] / F.J. Lu (Chinese Academy of Sciences) et
al. [5]
Explanation: What star created this huge puffball? What's pictured is the hot
expanding nebula of Tycho's supernova remnant [6] , the result of a stellar
explosion first recorded over 400 years ago by the famous astronomer Tycho
Brahe [7] . The featured image [8] is a composite of three X-ray [9] colors
taken by the orbiting Chandra X-ray Observatory [10] . The expanding gas cloud
[11] is extremely hot, while slightly different expansion speeds have given
the cloud a puffy [12] appearance. Although the star that created SN 1572
[13] , is likely completely gone, a star dubbed Tycho G [14] , too dim to be
discerned here [15] , is thought to be a companion. Finding progenitor
remnants of Tycho's supernova [16] is particularly important because the
supernova [17] is of Type Ia, an important rung in the distance ladder [18]
that calibrates the scale [19] of the visible universe. The peak brightness
of Type Ia supernovas [20] is thought to be well understood, making them
quite valuable in exploring the relationship between faintness and farness
[21] in the distant universe.
Tomorrow's picture: meteor mountain
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Authors & editors: Robert Nemiroff [33] (MTU [34] ) & Jerry Bonnell [35]
(UMCP [36] )
NASA Official: Phillip Newman Specific rights apply [37] .
NASA Web Privacy Policy and Important Notices [38]
A service of: ASD [39] at NASA [40] / GSFC [41]
& Michigan Tech. U. [42]
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Site notes:
[1] archivepix.html
[2] image/1901/TychoSNR_Chandra_3600.jpg
[3] http://www.nasa.gov/
[4] http://chandra.harvard.edu/
[5] http://arxiv.org/abs/1102.3829
[6] https://en.wikipedia.org/wiki/Tycho%27s_Super...
[7] http://galileo.rice.edu/sci/brahe.html
[8] http://chandra.harvard.edu/photo/2011/tycho2/
[9] https://science.nasa.gov/ems/11_xrays
[10] http://chandra.harvard.edu/about/
[11] http://chandra.si.edu/photo/2016/tycho/tycho_...
[12] https://www.youtube.com/watch?v=Zr_DwYHaxx4
[13] http://spider.seds.org/spider/Vars/sn1572.htm...
[14] https://en.wikipedia.org/wiki/Tycho_G
[15] https://arxiv.org/abs/1604.01779
[16] http://www.solstation.com/x-objects/tycho-s.h...
[17] http://www.youtube.com/watch?v=sTyMffjKTTo
[18] https://en.wikipedia.org/wiki/Cosmic_distance...
[19] ap181007.html
[20] http://en.wikipedia.org/wiki/Type_Ia_supernov...
[21] http://www-supernova.lbl.gov/PhysicsTodayArti...
[22] ap190112.html
[23] archivepix.html
[24] lib/apsubmit2015.html
[25] lib/aptree.html
[26] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
[27] calendar/allyears.html
[28] /apod.rss
[29] lib/edlinks.html
[30] lib/about_apod.html
[31] http://asterisk.apod.com/discuss_apod.php?dat...
[32] ap190114.html
[33] http://www.phy.mtu.edu/faculty/Nemiroff.html
[34] http://www.phy.mtu.edu/
[35] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
[36] http://www.astro.umd.edu/
[37] lib/about_apod.html#srapply
[38] https://www.nasa.gov/about/highlights/HP_Priv...
[39] https://astrophysics.gsfc.nasa.gov/
[40] https://www.nasa.gov/
[41] https://www.nasa.gov/centers/goddard/
[42] http://www.mtu.edu/
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