What will we find when we open it up to look inside?
Space news ( October 30, 2015) –
First viewed during an examination of Voyager 1 images of Saturn taken in 1980, Titan’s little moon Pandora is only 50 miles (81 kilometers) across in this green light image taken at a distance of about 1.2 million miles (1.9 million kilometers).
Pandora has lots of craters, indicating she’s still growing in size, and her final size and shape has yet to be determined. Very irregularly shaped presently, Pandora’s craters are covered with space debris from recent collisions on geological time scales. One day, if she collects enough debris, planetary scientist think Pandora could start to look more spherical in shape.
The fourth of Saturn’s known moons, Pandora orbits at a distance of about 141,700 km from her parent planet, and is the outer shepherd moon of the F ring. Planetary scientists think its elongated shape and low density could mean it was formed when the gravity of a dense core gathered nearby ring particles onto itself.
Named after the woman bestowed upon mankind by Zeus as a punishment for using Prometheus’ gift of fire, Titan’s little moon Pandora probably doesn’t contain all the ills plaguing humankind. Teams of scientists proposing to government space agencies or private concerns a mission to open it up and take a look inside might get a few laughs.
After all, all myths have a beginning somewhere in time, and nothing is impossible, in this universe, if you wait long enough for it to happen.
It wouldn’t be a surprise if one day we drifted by and took a better look.
Analysis of Cassini data identifies 101 distinct icy geysers erupting on surface of Enceladus
Space news – Enceladus, Saturn (Sept 22, 2014) –
Planetary space scientists looking at information obtained by NASA’s Cassini spacecraft of the south polar region of Saturn’s moon Enceladus over a seven-year study have viewed 101 watery-geysers on the surface. This suggests to scientists it’s possible for liquid from the underground sea believed to be under the moon’s icy exterior to reach the surface and erupt as a spray of small, icy particles.
NASA’s Cassini spacecraft first saw possible geysers of water vapor erupting from the icy surface of Enceladus almost a decade ago. At this time, tiger stripe fractures could be seen on the surface, and scientists suspected they might have something to do with the geysers they could see. It took until now to confirm, through the seven-year study just completed, the 101 geysers are in fact erupting from the tiger stripe fractures. They also discovered individual geysers originate from small hot spots seen in images collected using Cassini’s temperature-sensing instruments in 2010.
“Once we had these results in hand we knew right away heat was not causing the geysers, but vice versa,” said Carolyn Porco, leader of the Cassini imaging team from the Space Science Institute in Boulder, Colorado, and lead author of the first paper. “It also told us the geysers are not a near-surface phenomenon but have much deeper roots.”
Next for scientists
Taking a closer look at data concerning the gravity field around Enceladus, planetary space scientists concluded the only plausible source of the liquid erupting from the geysers is the sea beneath the icy exterior of the moon. Computer simulations also show narrow passages to the inner sea could stay open completely to the surface if filled with liquidwater.
Additional information on NASA’s Cassini space mission can be found here.
Links to additional information, images and animations can be found here.