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Earth's Twin Seen From Saturn
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![]() Alliance Member Comments
Dragon_of_Luck_Mah_Jonng1971 (Mar 10, 2013 at 6:25 PM):
My rating would be '12'.
Mercury_3488 (Mar 10, 2013 at 5:16 AM):
This is astonishing.
The Cassini Spacecraft passed 'behind' Saturn looking towards the inner solar system through the rings when the planet Venus, some 1.44 Billion KM / 890 Million miles was spotted throuht the rings on one ocassion prior to being eclipsed & then again righ next to Saturn's limb just after. The Sun although appearing close by was eclipsed by Saturn. Both the Sun & planet Venus (Mercury, Earth & Mars too) appeared in front of the constellation of Cetus the Sea Monster, near the boundary with Aries the Ram. I wonder if Cassini could capture Mercury, Earth (again) & Mars???? NeKto (Mar 7, 2013 at 7:33 AM):
as planets go, Earth and Venus have nearly identical masses. density is nearly identical. what we know about composition tell us there are striking similarities. there are major differences in the atmospheres; Venus has such a high concentration of greenhouse gasses that while only absorbing 30% more energy from the sun, it has a surface temperature that would melt lead. but what we know and what we can infer about what is below the surfaces tell us there are more similarities than differences.
as planetary science goes, there is a lot of good reasons to refer to them as twins. keeping in mind that twins need not be identical. i would compare the differences between Earth and Venus as being like human twins with different hair styles. from a planetary science standpoint, the similarities far outweigh the differences. poihths (Mar 5, 2013 at 7:52 PM):
"Earth's twin?" Could someone clue me in on just how Venus is Earth's "twin?" Would it be the extensive Venusian oceans? The cool, yet balmy temperatures? The clear skies and sparkling clarity of the atmosphere? The many and varied forms of life? I wouldn't even use the word "cousin" to make the comparison; "opposite" seems like it fits the bill pretty well.
Red_dragon (Mar 4, 2013 at 5:53 PM):
Impressive image, of course; really love the golden hue of the rings.
What's Venus' apparent magnitude seen from Saturn?. I estimate it around 0 (so bright as Vega) |