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Is this true ?
I was at Bunderburg (central east coast of Queensland, AUS) this week, and I
took my scope up there because the night sky is much clearer. Anyhow, I was looking at Venis (I assume it was) and was baffeled when I saw it only 2/5ths illuminated, it was like when we see our moon before it becomes a half moon, it looked as tho there was a much larger object covering one section of it, the separation wasn't exactly 1/2, it had that arch type divide to it. What I can't understand, is what would have been between the sun and venis on Wednesday night around 7pm ? I also watched over 5 hours at jupitor and it's moons as they were changing position. I could see one moon on one side and 3 on the other, after a few hours the 3 moons were almost looking like one. Just how fast is the 4 larger moons moving ? |
#2
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What I can't understand, is what would have been between the sun and venis on Wednesday night around 7pm ? Nothing. It's because Venus is between the Earth and the Sun. Actually it's position at the moment is roughly as below: S V E DaveL |
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On Fri, 16 Apr 2004 01:22:23 +1000, skozzy wrote:
I was at Bunderburg (central east coast of Queensland, AUS) this week, and I took my scope up there because the night sky is much clearer. Anyhow, I was looking at Venis (I assume it was) and was baffeled when I saw it only 2/5ths illuminated, it was like when we see our moon before it becomes a half moon, it looked as tho there was a much larger object covering one section of it, the separation wasn't exactly 1/2, it had that arch type divide to it. What I can't understand, is what would have been between the sun and venis on Wednesday night around 7pm ? Mostly empty space, like any other time. The reason Venus shows phases is the same reason the moon shows phases. There's an angle between the straight line joining earth and Venus, and the straight line joining the sun and Venus. The only time you'll see the full disc of Venus is when it's on the opposite side of the sun from earth (obviously not exactly opposite, else you wouldn't see it at all), just as you only see a full moon when the sun is on the opposite side of the earth as the moon. I also watched over 5 hours at jupitor and it's moons as they were changing position. I could see one moon on one side and 3 on the other, after a few hours the 3 moons were almost looking like one. Just how fast is the 4 larger moons moving ? That I don't know off hand. I expect you can find that information online with a bit of searching. -- - Mike Remove 'spambegone.net' and reverse to send e-mail. |
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Thanks guys.. I don't know why I didn't think of that.. must have been the
rum on the night. "skozzy" wrote in message ... I was at Bunderburg (central east coast of Queensland, AUS) this week, and I took my scope up there because the night sky is much clearer. Anyhow, I was looking at Venis (I assume it was) and was baffeled when I saw it only 2/5ths illuminated, it was like when we see our moon before it becomes a half moon, it looked as tho there was a much larger object covering one section of it, the separation wasn't exactly 1/2, it had that arch type divide to it. What I can't understand, is what would have been between the sun and venis on Wednesday night around 7pm ? I also watched over 5 hours at jupitor and it's moons as they were changing position. I could see one moon on one side and 3 on the other, after a few hours the 3 moons were almost looking like one. Just how fast is the 4 larger moons moving ? |
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skozzy wrote:
[snip] I also watched over 5 hours at jupitor and it's moons as they were changing position. I could see one moon on one side and 3 on the other, after a few hours the 3 moons were almost looking like one. Just how fast is the 4 larger moons moving ? The innermost Galilean satellite, Io, takes a little under two days to complete an orbit around Jupiter, while the outermost, Callisto, takes a little over two weeks. See http://nssdc.gsfc.nasa.gov/planetary/factsheet/galileanfact_table.html for more details. -- Odysseus |
#6
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Thanks for picking this page out for me..
"Odysseus" wrote in message ... skozzy wrote: [snip] I also watched over 5 hours at jupitor and it's moons as they were changing position. I could see one moon on one side and 3 on the other, after a few hours the 3 moons were almost looking like one. Just how fast is the 4 larger moons moving ? The innermost Galilean satellite, Io, takes a little under two days to complete an orbit around Jupiter, while the outermost, Callisto, takes a little over two weeks. See http://nssdc.gsfc.nasa.gov/planetary/factsheet/galileanfact_table.html for more details. -- Odysseus |
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