Posted on Jul 12, 2020
APOD: 2020 July 12 - Comet CG Creates Its Dust Tail
709
62
9
21
21
0
Good morning again, Rallypoint. Part Two of today's comet two-fer is titled "Comet CG Creates Its Dust Tail." We return to a 2015 image from the European Space Agency's (ESA) Rosetta probe to address the question "Where do comet tails come from?" The picture shows plumes of gas and dust escaping numerous places from Comet CG's nucleus as it neared the Sun and heated up. A similar process unfolded as Comet NEOWISE approached our Sun during the spring and summer. After many orbits near the Sun, a comet does eventually "expire." In some cases, all the volatile ices boil away, leaving a remnant of rock and dust. Sometime the comet completely disintegrates. Although comets seem long-lived from a human perspective, on an astronomical time scale, they evaporate quite rapidly. Given NEOWISE's 8,000+ year orbital period, it will probably be around for a while longer.
APOD: 2020 July 12 - Comet CG Creates Its Dust Tail
Posted from apod.nasa.gov
NASA
Space
Science
Photography
Astronomy
Posted >1 y ago
Responses: 8
11
11
0
Get Origins, ft. Natural, Zero, Machine and Bad Liar, out now: http://smarturl.it/OriginsID Shop Imagine Dragons: http://smarturl.it/ImagineDragonsShop Sign ...
Thank you my friend Maj William W. 'Bill' Price for posting the NASA Astronomy Picture of the Day (APOD) for Sunday July 12, 2020 entitled "Comet CG Creates Its Dust Tail."
Image: Comet CG Creates Its Dust Tail from ESA's robotic Rosetta spacecraft that orbited Comet 67P -Churyumov-Gerasimenko in 2015 -Image Credit & License - ESA, Rosetta, NAVCAM
APOD background
"Explanation: Where do comet tails come from? There are no obvious places on the nuclei of comets from which the jets that create comet tails emanate. One of the best images of emerging jets is shown in the featured picture, taken in 2015 by ESA's robotic Rosetta spacecraft that orbited Comet 67P/Churyumov-Gerasimenko (Comet CG) from 2014 to 2016. The picture shows plumes of gas and dust escaping numerous places from Comet CG's nucleus as it neared the Sun and heated up. The comet has two prominent lobes, the larger one spanning about 4 kilometers, and a smaller 2.5-kilometer lobe connected by a narrow neck. Analyses indicate that evaporation must be taking place well inside the comet's surface to create the jets of dust and ice that we see emitted through the surface. Comet CG (also known as Comet 67P) loses in jets about a meter of radius during each of its 6.44-year orbits around the Sun, a rate at which will completely destroy the comet in only thousands of years. In 2016, Rosetta's mission ended with a controlled impact onto Comet CG's surface."
While not directly related this seemed tamer than the heavy metal and entertaining :-)
Imagine Dragons - Radioactive
https://www.youtube.com/watch?v=ktvTqknDobU
FYI SP5 Mark Kuzinski COL Mikel J. Burroughs Col Carl Whicker SGT Steve McFarland 1SG (Join to see) CPL Dave Hoover Alan K. MSgt Robert "Rock" AldiMCPO Roger Collins LTC (Join to see) Lt Col Charlie Brown SPC Nancy Greene TSgt David L. Cpl (Join to see) SPC Woody Bullard SGT Denny Espinosa PO3 Bob McCord PO3 (Join to see) SPC Margaret Higgins
Image: Comet CG Creates Its Dust Tail from ESA's robotic Rosetta spacecraft that orbited Comet 67P -Churyumov-Gerasimenko in 2015 -Image Credit & License - ESA, Rosetta, NAVCAM
APOD background
"Explanation: Where do comet tails come from? There are no obvious places on the nuclei of comets from which the jets that create comet tails emanate. One of the best images of emerging jets is shown in the featured picture, taken in 2015 by ESA's robotic Rosetta spacecraft that orbited Comet 67P/Churyumov-Gerasimenko (Comet CG) from 2014 to 2016. The picture shows plumes of gas and dust escaping numerous places from Comet CG's nucleus as it neared the Sun and heated up. The comet has two prominent lobes, the larger one spanning about 4 kilometers, and a smaller 2.5-kilometer lobe connected by a narrow neck. Analyses indicate that evaporation must be taking place well inside the comet's surface to create the jets of dust and ice that we see emitted through the surface. Comet CG (also known as Comet 67P) loses in jets about a meter of radius during each of its 6.44-year orbits around the Sun, a rate at which will completely destroy the comet in only thousands of years. In 2016, Rosetta's mission ended with a controlled impact onto Comet CG's surface."
While not directly related this seemed tamer than the heavy metal and entertaining :-)
Imagine Dragons - Radioactive
https://www.youtube.com/watch?v=ktvTqknDobU
FYI SP5 Mark Kuzinski COL Mikel J. Burroughs Col Carl Whicker SGT Steve McFarland 1SG (Join to see) CPL Dave Hoover Alan K. MSgt Robert "Rock" AldiMCPO Roger Collins LTC (Join to see) Lt Col Charlie Brown SPC Nancy Greene TSgt David L. Cpl (Join to see) SPC Woody Bullard SGT Denny Espinosa PO3 Bob McCord PO3 (Join to see) SPC Margaret Higgins
(11)
(0)
LTC Stephen F.
I hope you will each enjoy a blessed Sunday and each day in the coming week.
FYI SMSgt Lawrence McCarter CPT Paul Whitmer PO3 Lynn Spalding PO2 (Join to see) 1SG Steven Imerman SPC Douglas Bolton SGT (Join to see)PVT Kenneth KrauseSPC Chris Bayner-CwikTSgt David L.PO1 Robert GeorgeSPC Matthew LambSSG Samuel KermonSP5 Geoffrey VannersonGySgt Gary Cordeiro SPC Nancy Greene 1stSgt Glenn Brackin SFC (Join to see) 1stSgt Glenn Brackin
FYI SMSgt Lawrence McCarter CPT Paul Whitmer PO3 Lynn Spalding PO2 (Join to see) 1SG Steven Imerman SPC Douglas Bolton SGT (Join to see)PVT Kenneth KrauseSPC Chris Bayner-CwikTSgt David L.PO1 Robert GeorgeSPC Matthew LambSSG Samuel KermonSP5 Geoffrey VannersonGySgt Gary Cordeiro SPC Nancy Greene 1stSgt Glenn Brackin SFC (Join to see) 1stSgt Glenn Brackin
(1)
(0)
7
7
0
Read This Next
Continue with Facebook 
Continue with Google