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 June 4
[2]
SEIS: Listening for Marsquakes
Image Credit: NASA [3] , JPL-Caltech [4] , Mars Insight [5]
Explanation: If you put your ear to Mars, what would you hear? To find out,
and to explore the unknown interior of Mars [6] , NASA's Insight Lander [7]
deployed [8] SEIS [9] late last year, a sensitive seismometer [10] that can
detect marsquakes. In early April, after hearing the wind and motions
initiated by the lander itself, SEIS recorded an unprecedented event [11] that
matches what was expected for a marsquake [12] . This event can be heard on
this YouTube video [13] . Although Mars is not thought to have tectonic plates
[14] like the Earth, numerous faults are visible on the Martian surface which
likely occurred as the hot interior of Mars cooled -- and continues to cool
[15] . Were strong enough marsquakes [16] to occur, SEIS [17] could hear
their rumbles reflected from large structures internal to Mars, like a liquid
core [18] , if one exists. Pictured last week [19] , SEIS sits quietly [20]
on the Martian surface, taking in some Sun [21] while light clouds [22] are
visible over the horizon.
Create a Distant Legacy: Send your name to Mars [23]
Tomorrow's picture: interstellar orion
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Authors & editors: Robert Nemiroff [35] (MTU [36] ) & Jerry Bonnell [37]
(UMCP [38] )
NASA Official: Phillip Newman Specific rights apply [39] .
NASA Web Privacy Policy and Important Notices [40]
A service of: ASD [41] at NASA [42] / GSFC [43]
& Michigan Tech. U. [44]
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Site notes:
[1] archivepix.html
[2] image/1906/SeismometerClouds_Insight_1021.jpg
[3] https://www.nasa.gov
[4] https://www.jpl.nasa.gov/
[5] https://mars.nasa.gov/insight/
[6] https://solarsystem.nasa.gov/planets/mars/ove...
[7] https://mars.nasa.gov/insight/spacecraft/abou...
[8] ap181210.html
[9] https://mars.nasa.gov/insight/spacecraft/inst...
[10]
https://www.seis-insight.eu/en/public-2/plane...
how-a-seismometer-works
[11]
https://www.nasa.gov/press-release/
nasa-s-insight-lander-captures-audio-of-first-likely-quake-on-mars
[12]
http://www.planetary.org/blogs/emily-lakdawal...
insight-detects-marsquake.html
[13] https://youtu.be/DLBP-5KoSCc
[14] https://svs.gsfc.nasa.gov/2953
[15] https://twitter.com/nasainsight
[16]
https://www.seis-insight.eu/en/public-2/marti...
[17] https://en.wikipedia.org/wiki/Seismic_Experim...
[18]
https://www.newscientist.com/article/
dn11962-lab-study-indicates-mars-has-a-molten-core/
[19] https://mars.nasa.gov/raw_images/10747/?site=...
[20] https://photojournal.jpl.nasa.gov/catalog/PIA...
[21]
https://www.luvbat.com/uploads/kitten_napping...
[22] ap010417.html
[23] https://mars.nasa.gov/participate/send-your-n...
[24] ap190603.html
[25] archivepix.html
[26] lib/apsubmit2015.html
[27] lib/aptree.html
[28] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
[29] calendar/allyears.html
[30] /apod.rss
[31] lib/edlinks.html
[32] lib/about_apod.html
[33] http://asterisk.apod.com/discuss_apod.php?dat...
[34] ap190605.html
[35] http://www.phy.mtu.edu/faculty/Nemiroff.html
[36] http://www.phy.mtu.edu/
[37] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
[38] http://www.astro.umd.edu/
[39] lib/about_apod.html#srapply
[40] https://www.nasa.gov/about/highlights/HP_Priv...
[41] https://astrophysics.gsfc.nasa.gov/
[42] https://www.nasa.gov/
[43] https://www.nasa.gov/centers/goddard/
[44] http://www.mtu.edu/
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