Discussion in 'Astronomy, Exobiology, & Cosmology' started by Present, Dec 10, 2005.
I hope that answers it for everyone else though.
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well it doesn't
you are forgetting librations of the moon
and the moons orbit is inclined to the ecliptic
the librations would produce an east/west motion of the earth
the inclination would produce a north/south motion
am i correct?
The moon is locked so that it presents the same face to the earth all the time during the lunar month. But if you were to take the wo balls it would show you just "about" what it would look like. It would not be perfect.Also, because the orbit of the moon is tilted about 5 degrees with respect to the Earth's equator, from the moon there will be locations where the earth will slowly rise and set during the lunar month as seen from the surface.
Leo, I still cannot improve on your original estimate that it would be a figure eight, and my own amendment, with distortions. I trust you are as amused as me by Ricky feeding you back your own explanation as if it were his, after you have pointed out how he had oversimplified his original answer. Please Register or Log in to view the hidden image!
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this is not true ricky
if the moon was "locked" then we on earth would only be able to see 50% of the surface.
but due to libration and inclination we are able to see approx. 59% of the surface
Leo - I have never been able to upload pictures onto this site, which is a shame, because this one is a beauty. It shows the path of the Earth as viewed by an observer on the moon.
This is exactly what you are looking for. A very intricate shape. Some comments from the site on what is influencing the final shape.
The average up/down latitude excursion is 5.13°, corresponding to the Moon's orbital inclination with respect to the ecliptic. A variety of other influences from the Sun add up to +/- 0.9° more to this.
The left/right longitude excursions are caused mainly by the Moon's orbital eccentricity. The major term is 2e radians, or 6.29°, where e = 0.055 is the orbit eccentricity. Interaction with the Sun contributes a little more, bringing the longitude peak movement to some 8°.
The combined latitude and longitude movement is a maximum of 9.5°, as can be seen at the "corners" of the plot.
Incidentally, this was the first hit of 114 for the Google search ""earth viewed from the moon".
nice graphic ophiolite
i am confused though
at the top it says "start 1994 june 21"
at the bottom it says "stop 1997 june 21"
does this graphic represent three years of observation?
Yes. I believe it does. If you could count the major excursions, without going cross eyed, you would find one for each month.
I possibly used the wreong context of locked. I meant that the moon is locked on it's orbit. With the inclinations and such it has a few different changes everyonce in a while, but nothing to much as to change the view completely. Just add the 9% to how much you see of Earth.
We need a "Fake Moon Landing" forum.... Please Register or Log in to view the hidden image!
I bet you there is one.
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But look how good they are compared to this site. I would much rather do it here then any other. That place is a joke compared to this place. Please Register or Log in to view the hidden image!
why? whenever someone gets a wild hair up their butt we'll just drag this thread out.
Yeah, maybe they faked it, otherwise no one would have a reason to say they did.
You, c7ityi, were arrested in the spring of 2004 for having sex with a goat in a suburb of Miami. Because of a failure to read you, or the goat, your rights, the case was never brought to trial.
Maybe the above is true, otherwise no one would have a reason to say it.
Yeah, maybe they didn't fake it. But why would someone want to create a rumor like that? Why?
1) They believe it to be the truth as a consequence of mental illness.
2) They want to be famous.
3) They are conducting an experiment to see how gullible the public is.
4) They have a beef with the government and this is one way of getting back at them.
5) They hope to make money out of lecturing on the rumour and writing books.
That should be enough to get you started.
The same reason Happeh sticks around.
For once we are in agreement. A most perceptive comment.
Thank you. Mazel Tov to you with your Happeh problems.
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