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The Motion of Mars: Part 2


KWIT - Apr 26, 2018
Last week we discussed how Mars periodically exhibits retrograde motion, where the planet moves east to west relative to the background stars instead of its more typical west to east motion. Understanding why Mars undergoes this motion has been a ...
 

The Motion of Mars


KWIT - Apr 19, 2018
This retrograde motion was very confusing to early sky watchers who initially thought it represented an angry god or some other mystical meaning. Later, it was believed to represent the actual motion of Mars in its orbit (we'll discuss this more next ...
 

The Motion of Mars: Part 3


KWIT - May 3, 2018
With Mars and all the planets now orbiting the Sun, the retrograde motion of Mars is what we see from Earth as the faster-moving Earth passes the slower-moving Mars in their respective orbits. So according to Copernicus, the retrograde motion of Mars ...
 

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Retrograde Motion of Planets Explained


Why do planets occasionally move backward in the night sky? This video explains the phenomena known as retrograde motion. (Spoiler Alert): The apparent ...
 

Retrograde Motion


The planets normally move from west to east against the background of the stars, but every so often they backtrack for a while before resuming their eastward ...
 

Retrograde Motion and the Opposition of Mars


Superior planets (planets that are further from the Sun than Earth) can undergo retrograde motion when they are near opposition (the point in the sky that is ...
 

Retrograde Motion


This video surveys observations, historical theories, use of a mechanical demonstration, and compares the apparent motion for all superior planets of the motion.
 

Retrograde Motion of Mars 2016


This is a time-lapse video of the retrograde motion of the planets Mars and Saturn during the summer of 2016. The second part of the video are the same images ...