Apparent size distance and same distance view question
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Apparent size distance and same distance view question
I was thinking about the Mars hoax and that got me thinking about two interesting (possibly APOD) ideas.
First - how far would each of the planets have to be from Earth to appear the size of the full moon.
Second - what would the sky look like if they were the distance to the moon. I know that the outer diameter of the rings of Saturn are about equal to the Earth-Moon distance - roughly. As is approximately the Io-Jupiter distance. Probably with Jupiter and Saturn, the entire sky would be taken up in this exercise.
As in, how much of the sky would be taken up if each of the other 8 planets were 250,000 miles away.
Anyone want to take a whack at this one?
First - how far would each of the planets have to be from Earth to appear the size of the full moon.
Second - what would the sky look like if they were the distance to the moon. I know that the outer diameter of the rings of Saturn are about equal to the Earth-Moon distance - roughly. As is approximately the Io-Jupiter distance. Probably with Jupiter and Saturn, the entire sky would be taken up in this exercise.
As in, how much of the sky would be taken up if each of the other 8 planets were 250,000 miles away.
Anyone want to take a whack at this one?
Light travels at 186,000 miles per second. Any faster would be dangerous.
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Star Wars instead, huh?
Haven't since Return of the Jedi. Sorry.
But let's talk starquakes and AXPs and SGRs and I might be interested.
But let's talk starquakes and AXPs and SGRs and I might be interested.
Light travels at 186,000 miles per second. Any faster would be dangerous.
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Sorry, it is not a linier equation. The Moon covers on average 2 degrees of arc (or is ir 0.5?). If Mars was at the same distance as the Moon it would measure 4 degrees - that would be a linier measurement. For the distances of the rest of the planets to equal 2 degrees arc, the equation would have the factor Pi involved.
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Distance Question revisited
So the diameter of the other planet divided by the diameter of the moon times the earth moon distance gives us the distance that planet would have to be to appear the size of the full moon. Did I phrase that correctly? If that aren't any other wonky factors, i can do the research and crank out my answer.
The second question as to what the sky would look like if any of the other planets were the earth-moon distance away is still an intriquing one visually.
The second question as to what the sky would look like if any of the other planets were the earth-moon distance away is still an intriquing one visually.
Light travels at 186,000 miles per second. Any faster would be dangerous.
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Consider yourself lucky; some might say by definition the Earth and the Moon are a binary planet system. Mercury and Venus don't have any moons, on Mars the moons are hardly noticeable, and by size comparison the gas giants' moons would be equally unnoticeable. It is so dark near Pluto, nothing would be interestingly visible anyway the most visible part of the moon(s) would be them eclipsing light sources.
In a way, you have your wish - enjoy it.
In a way, you have your wish - enjoy it.
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Consider this, Jupiter would just fit between Earth and the Moon. If either of the gas giants were the moons distance away, (and we were moving fast enough for a stable orbit), they would fill the field of view. If saturn were placed between the Earth and Moon, the ring system would disappear in one orbit and earth, crater wise, would look like the moon.
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