Mars Loops The Loop

Submitted by: rubrepublic 6 years ago Science

The ancients once believed we were at the centre of the universe but this clip reveals how that idea was debunked
There are 39 comments:
Female 2,695
the rock he used to represent the sun is awesome
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Female 236
Finally something that I can watch that America can`t!! WOOOOO!
(yes, I`m am tired of getting "This service is only provided for the US")
SUCK IT!!

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Female 249
They couldn`t get this guy a chalk board?
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Male 15,832
tainteddeity "Theory says there isn`t a centre of the universe."

Actually, the Universe may or may not have a center, but the OBSERVABLE Universe does have a center: it`s at the location of the observer. If anyone asks you the location of the center of the Universe, you can answer truthfully and correctly, "It`s right here."
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Male 185
peloos12,

please dont use logic on this forum, many members take offense to such a thing.
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Male 12,365
[quote]Tried viewing the BBC channel on YouTube for more videos like this and it states: This channel is not available in your country. wtf?[/quote]

The BBC is a socialised TV organisation, paid for by taxes in the UK. So it`s not legally available for free outside the UK and the BBC has an obligation to UK taxpayers to uphold that. Some stuff gets ripped off, some doesn`t.
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Male 112
"Tried viewing the BBC channel on YouTube for more videos like this and it states: This channel is not available in your country. wtf?"

Haha, no good programming for you. lucky im in the uk and can enjoy the bbc any time
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Female 376
that`s pretty cool ^_^
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Male 795
Tried viewing the BBC channel on YouTube for more videos like this and it states: This channel is not available in your country. wtf?
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Male 3,819
I`m with Pink on this one. The point isn`t the ZOMGGROUNDBREAKINGREVELATION that the Earth isn`t the center of the universe. It`s simply demonstrating how they figured this out using only far less advanced technology and sheer logic.
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Male 757
and grass is still green...
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Male 784
I thought Mars was a chocolate...hmmm
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Male 848
Theory says there isn`t a centre of the universe.
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Male 749
We watched this in Physics class just before the holidays.
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Female 3,828
Ya it does seem obvious, but i still interesting i guess. and it DOES prove were not the center of the universe.Interesting to know how the ancients found that out.
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Male 4,547
I think Rick meant that the Earth not being the center of the universe should be known by everyone, not that Mars has a retrograde motion from an Earthly perspective caused by a combination of the delta in velocity and the circumference of the differing orbits.

Either way, this site has a 13-17 age bracket as a fairly big part of the community. I doubt most 13 year olds know this already.
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Male 12,365
[quote]For those IAB`ers under 40, the presenter Brian Cox once played keyboards for English new wave band "D Ream". He`s currently working experiments using the Large Hadron Super Collider in Switzerland.[/quote]

In case anyone gets the wrong impression from the above (which is true), he`s a bona fide physicist. He`s a professor at the University of Manchester and specialises in particle physics.

He played keyboards for the then-unknown band D Ream when he was a student, like lots of students who play in unknown bands. What was different was that they had a massive hit ("Things can only get better"). He`d finish lectures and then go off to play live in front of 50,000 people. That must have been an odd contrast.

Each episode has viewing figures over 5 million. Pretty impressive for a science documentary series in a country of 61m people.

He`s also co-authored a book, "Why Does E=mc^2?", which explains relativity
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Male 3,915
was i the only one that already knew this? this just seemed boring and obvious....but i guess not everybody took an astronomy class 5 months ago...=D
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Male 894
that was cool
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Male 660
For those IAB`ers under 40, the presenter Brian Cox once played keyboards for English new wave band "D Ream". He`s currently working experiments using the Large Hadron Super Collider in Switzerland.
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Male 17,512
These observations are what began calculus. The mathematics involved in calculating just how and when these loops would occur was originally very complex, Especially when you also have to factor in the earth`s tilt and elliptical orbit.
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Male 820
For a guy with a burnt stick and some rocks, a fairly good job.
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Male 9,306
"If you have a TV, you should know this, really."

I only watched Animal Planet and Cartoon Network when I had a TV. I`m not stupid, I just enjoy positive programming that pertains to my interests.
( ._.)
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Male 15,832
Yeah, what xiquiripat said.

This was correct in theory, but the geometry was off quite a bit. The retrograde motion starts BEFORE Earth overtakes Mars; it reaches its fastest apparent backward motion when the planets align with the sun (opposition), and it resumes its forward motion long before he shows in the video.

One fact that he didn`t mention that would have made the explanation much more clear is that the Earth travels faster along its orbit than Mars does (29.78km/s for Earth vs. 24.13km/s for Mars, mean orbital velocity). This is why when we pass on the inside, Mars appears to be moving backwards against the distant background stars.
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Male 3,619
i never thought about that...
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Male 2,422
"stoopid Ptolemy and his epicycles"

Ptolemy`s theory lasted 2000 years because it worked like a peach. The only problem was the complexity of the mathematics. Copernicus` theory wasn`t much better because he kept all the epicycles and retrograde motions. In fact, on strict scientific grounds available at the time it was probably worse than Ptolemy`s (that dammed parallax) and he was forced to argue from aethetics. He was still obsessed with the idea of perfect circles. It wasn`t until Kepler that we got a theory of celestial mechanics that was both useful and simple.
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Male 102
Easy... whatever dude. Wasn`t so easy 500 years ago.
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Male 25,416
Cool makes total sense! didnt really care to much about it but still cool!
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Male 10,339
Duffy. That`s not religion. That`s old crappy astrology.
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Male 1,190
Please tell me I am not the only one who learned this in junior high school?!?!
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Male 5,194
Earth not at the center of the solar system? Dammit, IAB, I wish you would quit baiting religious types.
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Male 3,314
I realize that this took us years to figure out, but the way he presents it like it`s new science. "The key thing is that the Earth is NOT at the center of the Solar System." If you have a TV, you should know this, really.
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Female 1,071
Clever video, thanks =)
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Male 5,314
it`s funny this is up here, because just a week ago i had an astronomy test and this was one of the short answer questions. i got 5/5 pts. :-)

stoopid Ptolemy and his epicycles.
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Male 7,585
and it took us many, many years to figure that out.
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Female 92
I feel smarter now.
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Male 12,365
It`s a good series in general and Professor Brian Cox is just the job for presenting science programs in a way that has broad appeal and is educational.
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Male 554
it all makes sense now =O
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Female 10
Link: Mars Loops The Loop [Rate Link] - The ancients once believed we were at the centre of the universe but this clip reveals how that idea was debunked
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