Voyager 1 images of Earth, Where? |
Voyager 1 images of Earth, Where? |
Jun 15 2006, 02:12 PM
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#1
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Member Group: Members Posts: 345 Joined: 2-May 05 Member No.: 372 |
I know for a fact that Voyager 1 took at least one picture of Earth. Does anyone have any idea where raw data can be found? Or any data at all, for that matter? The only online image I can find is this one: http://photojournal.jpl.nasa.gov/catalog/PIA00013
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Jul 1 2006, 07:37 PM
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#2
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Hey, I can see my house!
Did you remove the sunbeam purposely? Or did it just disappear when you enhanced it? Your image certainly brings home the Pale Blue Dot theme. At the distance Voyager 1 was from Earth in 1990, what would our planet's relative magnitude be? -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Jul 3 2006, 06:53 AM
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#3
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Member Group: Members Posts: 115 Joined: 8-January 05 From: Austin | Texas Member No.: 138 |
Hey, I can see my house! Did you remove the sunbeam purposely? Or did it just disappear when you enhanced it? Your image certainly brings home the Pale Blue Dot theme. At the distance Voyager 1 was from Earth in 1990, what would our planet's relative magnitude be? I just kept tinkering until I was able to make the 'background' around earth nice and dark -- then I tried to bring out a bit of the pale blue that was imaged by Voyager. I would hate to try and guess what the earth's magnitude would be if one was riding 'on board' Voyager -- I would think right around 0.0 [neither negative nor positive] but I will leave this to someone more versed in the relative brightness of celestial objects. |
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May 7 2007, 07:48 PM
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#4
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
I would hate to try and guess what the earth's magnitude would be if one was riding 'on board' Voyager Half Venus has a magnitude of -4 from about 1 AU. Earth is about 1/4 the brightness of Venus. When Voyager was about 30 AU out, it would be 1/900 dimmer still. 1/3600 of Venus's brightness is 9 magnitudes dimmer, so a half Earth as seen from Voyager (Neptune) would be about a +5 magnitude object. A lot brighter than Neptune is, seen from Earth, since Earth is so much closer to a light source. Interestingly, that means the planets "visible" to the human eye from Neptune would include Venus, Earth, Jupiter, and Saturn... probably not Uranus, which would show a crescent except when it was very far away. |
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