5 votes

Is the Moon really oscillating around its orbit as seen from Earth?

This is a perspective effect. We are on a revolving planet, so as the planet rotates, the moon will appear to move slightly with respect to the distant stars. You can see that if you place yourself ...
James K's user avatar
  • 122k
2 votes
Accepted

Is the Moon's orbital plane angle relative to the ecliptic constant?

Not quite. The angle of the Moon's orbital plane with respect to the ecliptic is fairly constant at ~5.1° with a bit of variation as pointed out by @PM2Ring in their comment. The orbit and the plane ...
planetmaker's user avatar
  • 19.4k
2 votes
Accepted

Copernican model for motion of Mars in Solar Ecliptic Coordinate System

if my ascending node was at 50 degrees and the argument of perihelion is 286 degrees, then Mars should be in the neighbourhood of 336 degrees longitude at its perihelion That's correct, assuming that ...
PM 2Ring's user avatar
  • 14.5k
2 votes

Will a circular orbit cause doppler shift?

There are two effects to be taken account of, both of which are easy to handle for the case of a circular orbit around a spherically symmetric static body where the orbiting mass is much smaller than ...
ProfRob's user avatar
  • 152k
1 vote

Is the Moon's orbital plane angle relative to the ecliptic constant?

Is this a correct understanding? Not exactly. The Sun is a huge perturber of the Moon's orbit. From a heliocentric perspective, the gravitational acceleration of the Moon toward the Sun is over twice ...
David Hammen's user avatar
1 vote

Will a circular orbit cause doppler shift?

In a circular orbit there is obviously no classical radial Doppler shift observed from either of the bodies as the distance is always constant. However Relativity predicts an additional frequency ...
Thomas's user avatar
  • 3,476

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