Enter the last of the big ones - Callisto

in science •  8 days ago 

And second largest of the Jovian moons.

Here is a good graphic for comparative purposes.

Relative Masses of Jovian Satellites.png
By NASA / JPL / University of Arizona NASA/JPL/DLR National Oceanic and Atmospheric Administration NASA/JPL/DLR(German Aerospace Center) - Own work, based on: http://photojournal.jpl.nasa.gov/catalog/PIA02308 http://photojournal.jpl.nasa.gov/catalog/PIA00502 https://web.archive.org/web/20111028055701/http://sos.noaa.gov/images/fullsize/Solar_System/ganymede.jpg http://photojournal.jpl.nasa.gov/catalog/PIA03456, Public Domain, Link

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awesome astronomy sir,a very useful work sir @gavvet

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