Transit of Venus, Not unmannedspaceflight but it's in space, so.... |
Transit of Venus, Not unmannedspaceflight but it's in space, so.... |
May 21 2012, 02:42 AM
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Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
Q: Will the transit of Venus in a few weeks, be visible at Mars?
Could Oppy (or orbiters) resolve it ??? -------------------- CLA CLL
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Jun 6 2012, 07:17 PM
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Senior Member Group: Members Posts: 2090 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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Jun 7 2012, 09:01 AM
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
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Guest_Oersted_* |
Jun 7 2012, 11:09 PM
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Guests |
Hmm. The limb of the Sun appears to be visible 'through' Venus in some of those sequences. Is there some sort of memory effect in the detectors that would account for this? I'd say that it is more probably an effect from the video compression. However, it is also visible in the "raw" video (example)...: http://venustransit.gsfc.nasa.gov/data/kio...n/phase/ingress |
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Jun 8 2012, 10:50 AM
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
However, it is also visible in the "raw" video (example)...: http://venustransit.gsfc.nasa.gov/data/kio...n/phase/ingress My guess is it's a diffraction effect in the optics. That video you posted also shows what appear to be diffraction fringes on Venus' dark disc, noticeable before ingress. Depending on how the optics and supports inside the telescope are oriented, you might get a diffraction "plane" that by chance matches with the Sun's limb slope at that point. -------------------- |
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