Retrograde Motion

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Published 2015-05-16

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

All Comments (21)

@CrisHaasbro 5 years ago

I finally understand, that demonstration was phenomenal
@suketupb 3 years ago

I teach Astronomy, and this is one of the best demonstrations I have seen explaining retrograde motion! Congratulations!!
@noneyabeezwax8865 5 years ago

Finally, a prefect explanation and beautiful visual model!
@wojohugo 5 years ago

This is the BEST video I have come across explaining "apparent" retrograde motion of superior planets... a job very well done!
@Tamara-dv7vo 1 year ago

Thank you for finally helping me understand. I think maybe it 85% make sense to me now which is SO much more progress than I've made with other videos / explanations!
@pchebbi 4 years ago

Simply love the speaker's voice. Crystal clear. What an awesome and novel effort of mechanical demo! Hats off!!!
@yaltschuler 2 years ago

In case anyone is curious, the song is "I Don't See the Branches, I See the Leaves" by Chris Zabriskie.
@ShivangiKrishna 2 years ago

That demonstration tool was sooo good and well explanatory
@mikesnyder1788 5 years ago

As a newcomer to star watching I observed retrograde motion of Mars in either 1978 or 1979 but had no idea what was happening. Took me a few years to run across a scientific explanation and - Bingo - my riddle was solved. Very good presentation! Regards.
@saadasad6481 4 years ago

Thanks for this video, I understand this phenomenon now due to your phenomenal demonstration and explanation.
@brigettebradley9914 3 years ago

Mind blown. Thank you. This visual was Much needed! And I love the hand crank for teaching
@hoorainbaig2024 1 year ago

I am an audit and accounting student. I've recently grew an interest in astronomy so i've been watching videos related to it. Your video explained it really well. And if anyone sees my comment do recommend good beginners guide to astronomy.
@eiliam7274 5 years ago

Simply, brilliant! Thank you for this.
@nanivins 8 years ago

Excellent presentation.
@DifferentSaturner 1 year ago

You explained it very well, Tina. Thank you. It's about how we see those from distance. The sun & the moon are too far & very close, so we don't see those go retrograde. It's including galaxies, distant planets, objects. (Fri 12 Aug 2022 15h32)
@VishalMotwani9 4 years ago

So clear and simple .. finally understood the thing .. thanks for your efforts
@sumitdagar9806 3 years ago

Excellent explanation, thanks for such a great video.
@Shiva1945 2 years ago

Best I have seen yet
@marutinandan67532 2 years ago

Thanks for the wonderful explanation. 🙏
@pramodm3540 2 years ago

It is sometimes observed in transparent lift confusing whether we are going up or down after it stops midway, watching outside. It happens coincidentally and not consciously.