Posted on 10/03/2015 7:42:02 PM PDT by ETL
NASA’s New Horizons spacecraft has sent incredible images of Pluto’s largest moon Charon back to Earth.
The latest images reveal the moon’s complex and violent history, according to NASA. “Many New Horizons scientists expected Charon to be a monotonous, crater-battered world; instead, they’re finding a landscape covered with mountains, canyons, landslides, surface-color variations and more,” explained the space agency, in a statement.
The high-resolution images, which were taken on July 14 and transmitted to Earth on Sept. 21, reveal a belt of fractures and canyons just north of the moon’s equator. Four times as long as the Grand Canyon, and twice as deep in places, the faults and canyons indicate a titanic geological upheaval in Charon’s past, according to NASA.
(Excerpt) Read more at foxnews.com ...
Charon (Geology)
“Charon’s diameter is 1,208 kilometres (751 mi)—just over half that of Pluto,[26] and larger than the dwarf planet Ceres. Charon is sufficiently massive to have collapsed into a spheroid under its own gravity. Unlike Pluto’s surface, which is composed of nitrogen and methane ices, Charon’s surface appears to be dominated by the less volatile water ice. In 2007, observations by the Gemini Observatory of patches of ammonia hydrates and water crystals on the surface of Charon suggested the presence of active cryogeysers and cryovolcanoes.[27][28]
Charon’s volume and mass allow calculation of its density, from which it can be determined that Charon is slightly less dense than Pluto and thus contains a larger proportion of ice relative to rock in its interior; the difference is considerably lower than that of most suspected collisional satellites. Before New Horizons’ flyby, there were two conflicting theories about Charon’s internal structure: some scientists thought Charon to be a differentiated body like Pluto, with a rocky core and an icy mantle, whereas others thought it would be uniform throughout. Evidence in support of the former position was found in 2007, when observations by the Gemini Observatory of patches of ammonia hydrates and water crystals on the surface of Charon suggested the presence of active cryogeysers. The fact that the ice was still in crystalline form suggested it had been deposited recently, because solar radiation would have degraded it to an amorphous state after roughly thirty thousand years.[27]
Photometric mapping of Charon’s surface shows a latitudinal trend in albedo, with a bright equator band and darker poles. The south polar region is apparently darker than the north.[29] The north polar region is dominated by a very large dark area informally dubbed “Mordor” by the New Horizons team.[30][31][32] Aside from Mordor, however, New Horizons imaged very few other impact craters on Charon and found a youthful surface, adding support to the above theory that Charon is geologically active and thus probably differentiated.[31] In particular, the southern hemisphere has fewer craters than the northern and is considerably less rugged, suggesting that a massive resurfacing event—perhaps prompted by the partial or complete freezing of an internal ocean—occurred at some point in the past and removed many of the earlier craters.[33]
https://en.wikipedia.org/wiki/Charon_%28moon%29#Geology
I think it’r pronounced Karen.
That little globe has had a hard life. Looks like something darn near cracked it in two...
Complex image. Thanks for posting.
Which one? 24 or 2?
:)
It looks like it was painted by Jackson Pollock.
Well, there goes my usual lame attempt at humor!
2 for me, 24 for my granddaughter. ;-)
Don’t feel too bad. My joke at post 20 failed miserably.
Once, while taking a college course in astronomy, I asked the teacher “Does Uranus emit gases”? Uranus IS after all one of the 4 gaseous planets: Jupiter, Saturn, Uranus and Neptune. The teacher laughed, but I don’t think any of my classmates did. I doubt they got the joke. At least half of them were foreigners.
Bada Boom
Cool (probably very cool). Thanks for posting and FReeper humor.
Why can’t you see any stars in the background?
That’s the first thing that came to my mind as well!
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