Size Comparism Of The Moons Of The Gas Planets, Moon Systems of the gas giants compared |
Size Comparism Of The Moons Of The Gas Planets, Moon Systems of the gas giants compared |
Guest_spaceffm_* |
Nov 15 2005, 12:10 AM
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Nov 18 2005, 08:38 AM
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
I always had a mental image of the Galilean satellites as being larger; seeing them compared to our Moon, they look like rather mundane rock/ice/sulfur balls.
Don't worrry about bringing up the copyright issue; as imagers/photographers many of us have been affected by mis-use incidents, so thatis a collective "short fuse". --Bill -------------------- |
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Nov 18 2005, 10:09 AM
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Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
QUOTE (Bill Harris @ Nov 18 2005, 08:38 AM) I always had a mental image of the Galilean satellites as being larger; seeing them compared to our Moon, they look like rather mundane rock/ice/sulfur balls. Well, they are large: just not particularly large in comparison with Earth. But the Earth is big, something we're disposed to forget when we've been told so often just how small and insignificant we are -- it's the largest terrestrial planet, and the biggest thing in the Solar System that isn't a star or a 'gas giant'. By the way, it occurs to me that, although I am used to thinking of Uranus and Neptune as miniature Jupiters, they are -- in both size and structure -- almost as different from Jupiter and Saturn as they are from Earth. I think mundane is a good word for objects of this size, though; mundanus in Latin means "of or relating to the world", and they are worlds in themselves, even if not big ones. Maybe the IAU guys who are coming up with classifications for the solar system can employ a category, "mundane objects". |
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Nov 18 2005, 03:47 PM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
QUOTE (David @ Nov 18 2005, 03:09 AM) Well, they are large: just not particularly large in comparison with Earth. But the Earth is big, something we're disposed to forget when we've been told so often just how small and insignificant we are -- it's the largest terrestrial planet, and the biggest thing in the Solar System that isn't a star or a 'gas giant'. By the way, it occurs to me that, although I am used to thinking of Uranus and Neptune as miniature Jupiters, they are -- in both size and structure -- almost as different from Jupiter and Saturn as they are from Earth. I think one thing that surprises me is how many scales there are. You've got the scales of Jupiter and Saturn, and the one of Uranus and Neptune, and the one of Earth and Venus, and the one of Ganymede and Titan, and the one of Europa and Triton, and the one of Rhea and Oberon, and the one of Enceladus and Mimas -- Jupiter is more than 300 times the diameter of Enceladus yet you are still dealing with spherical worlds from one end to the other. And we've barely scratched the surface of the study of the geology of any of these other worlds except Earth. The Moon is the only other place we've left seismometers on or brought samples back from. All those other places -- they're still mysteries. Even Mars. Here's the next page, 50 km/pixel --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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