Talk:Lunar distance (astronomy)
|WikiProject Astronomy||(Rated Stub-class)|
Does "the distance from the Earth to the moon" mean the distance between their centres?
The article states that the Moon is spiraling away from the Earth at an average rate of 3.8 cm per year. With this level of achievable accuracy, why is the Lunar Distance specified to the nearest kilometer and not, say, to the nearest meter?
- (1) Yes, between the centers. (2) I'm not sure. It may be that it is easier to measure the rate at which it is receeding than measuring the absolute distance that accurately. Bubba73 (talk), 01:28, 30 May 2007 (UTC)
- Because of the eccentricity of the Moon's orbit around the Earth, the distance is varying all the time. A quick calculation suggests that the distance varies at an average of about 35 m/s (slower near perigee and apogee, faster in between). On top of that, the distance to the Moon at perigee and apogee varies considerably, so quoting the distance more accurately would be spurious. treesmill (talk) 20:17, 10 March 2012 (UTC)
I saw a tv show where it said that the Moon was during the dinosaur era much closer to Earth, making the days shorter. I can´t find nothing of this. I don's peak english very well.--Comu_nacho (spanish speaker) (talk) 18:48, 17 June 2010 (UTC)
What is the point of this article?
Everything in this article is covered by other articles on the Moon, two of which (Orbit of the Moon, Lunar Laser Ranging Experiment) are even linked from this article. treesmill (talk) 20:06, 10 March 2012 (UTC)
- Near-Earth asteroids use this term all the time to clarify close approaches to the Earth. -- Kheider (talk) 20:10, 10 March 2012 (UTC)
File:Earth-Moon.png to appear as POTD
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|Picture of the day|
Lunar distance is a measurement of the distance from the Earth to the Moon. This diagram shows the distance, averaging 384,400 km (238,900 mi), to scale, as well as the Earth and the Moon (scroll to see the entire image).