Questions tagged [retrograde-orbit]

Questions regarding the movement of a celestial body that is in the opposite direction of another celestial body the original one is orbiting.

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How would a retrograde satellite experiencing tidal deceleration affect the rotation of the primary?

There are two common scenarios like this one, where an orbiting body orbits its primary slower than the primary rotates, resulting in the orbiting body moving away and the primary experiencing a ...
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How to easily find out the periods when a planet gets into retrograde?

How to easily find out the periods when a planet gets into retrograde? for eg I want to find out all the periods, in last 5 thousand years, when mars goes into retrograde in Sidereal Scorpion? Is ...
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1answer
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If I know apparent planetary positions how do I calculate the date?

I have planetary position in retrograde how do I calculate the date? For eg, I know Mars was in retrograde in Scorpion (Sidereal 210 to 240 deg), how do I calculate the date and year of this? As of ...
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1answer
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Retrograde Motion: Stars in the background

I was reading about the retrograde motion of Mars. All explanations give reference to the stars in the background. But I do not understand why this is necessary. I say this since stars themselves also ...
6
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2answers
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what is the resolution of the magnitude that is distinguishable to the naked eye?

Or is it possible to spot the changing brightness (magnitude) of a planet with a naked eye The context of the question is this: If I'm not mistaken Ptolemy was able to say (using observation alone) ...
4
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1answer
103 views

Do astronomers have any idea what percentage of our galaxy’s stars move in retrograde orbits?

I recently noticed that none of the planets in our solar system orbit the Sun in a retrograde direction. This is likely because they formed moving in the same direction as the planetary disk did in ...