Vermont Public is independent, community-supported media, serving Vermont with trusted, relevant and essential information. We share stories that bring people together, from every corner of our region. New to Vermont Public? Start here.

© 2024 Vermont Public | 365 Troy Ave. Colchester, VT 05446

Public Files:
WVTI · WOXM · WVBA · WVNK · WVTQ · WVTX
WVPR · WRVT · WOXR · WNCH · WVPA
WVPS · WVXR · WETK · WVTB · WVER
WVER-FM · WVLR-FM · WBTN-FM

For assistance accessing our public files, please contact hello@vermontpublic.org or call 802-655-9451.
Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations

Infrared Views Of Two Of Saturn's Moons Reveal 'Pac-Man' Features

For the second time in two years, Cassini has spotted a Pac-Man-like feature on one of Saturn's moons.

As NASA puts it, it is a veritable "gamers' paradise." Just take a look:

What you're seeing there is the infrared image taken of the moon Mimas in 2010 and the other is of the moon Tethys taken this year. The red and yellow areas show the warmest places on the moon.

"Finding a second Pac-Man in the Saturn system tells us that the processes creating these Pac-Men are more widespread than previously thought," said Carly Howett, the lead author of a paper explaining the findings, which was published in the journal Icarus.

As NASA writes in a press release, it's an odd shape, but scientists think they know how it came to be.

NASA reports:

"Scientists theorize that the Pac-Man thermal shape on the Saturnian moons occurs because of the way high-energy electrons bombard low latitudes on the side of the moon that faces forward as it orbits around Saturn. The bombardment turns that part of the fluffy surface into hard-packed ice. As a result, the altered surface does not heat as rapidly in the sunshine or cool down as quickly at night as the rest of the surface, similar to how a boardwalk at the beach feels cooler during the day but warmer at night than the nearby sand. Finding another Pac-Man on Tethys confirms that high-energy electrons can dramatically alter the surface of an icy moon. Also, because the altered region on Tethys, unlike on Mimas, is also bombarded by icy particles from Enceladus' plumes, it implies the surface alteration is occurring more quickly than its recoating by plume particles."

Copyright 2021 NPR. To see more, visit https://www.npr.org.

Eyder Peralta is NPR's East Africa correspondent based in Nairobi, Kenya.
Latest Stories