Milankovitch Cycles Precession and Obliquity
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85 videosCosmology and Astronomy- 2:06
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Wow, does this mean that when civilization began 10,000 years ago, polaris was almost 45 degrees from the zenith? Almost half way towards the equator?
cassideh 3 weeks ago
This is a very good explanation, thanks.
MrJosephNicholson 4 weeks ago
How is the angle measured?
Zidriz 1 month ago
Milankovich also along with one serbian math teacher `invented` the most accurate calendar, but it is not accepted so far
Bayubadu 4 months ago
I'm taking Astronomy now and had a hard time understanding this obliquity vs precession thing but this video just hit the spot. I completely get it. Sal, you're a godsend!
Dorkus89Malorkus 6 months ago
@ScrakeShredder They probably are insane, but actually they're talking about the magnetic poles, which don't really have anything to do with what Sal has been talking about in these videos. The magnetic and rotational poles aren't the same.
hooloovoo1st 7 months ago
Also if precession was in sync with orbit, would everything fly off the back half of the earth, and gravity increase on the sunny half, or would earth's own spin maintain gravity?
ScrakeShredder 7 months ago
So if precession was in sync with orbit, one ice cap would dissappear and the other would grow in size. Also, the more I watch these videos, the more "sudden pole shift panicers" sound insane.
ScrakeShredder 7 months ago
If i understood this correctly, precession changes the time of the seasons over long periods of time, and obliquity changes the strength of the seasons over long periods of time. So in a several thousand years, if we still use the same calendar system, summer and winter will happen in different months and they will be more mild or more harsh.
vicksoma 7 months ago
Whyyyyyyyyy, Mr. Khan, I took this course two years ago - if only I could go back =( good job though!
orcelb 7 months ago