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Cruithne

Hits: 4034 | Rating: (2.5) | Category: Science | Added by: Gerry1of1
Jump to: Bottom    Last Post
5Cats
Male, 50-59, Canada
 25750 Posts
Tuesday, August 20, 2013 3:11:57 PM
@Gerry1: That graphic is what Cruithne's orbit "looks like from Earth" and not it's actual path...
I have bad news about Pluto...

@Draculya: Yeah, you're right. And I also think Cruithne is WAY too small to be considered a "moon".

Gerry1of1
Male, 50-59, Western US
 33910 Posts
Tuesday, August 20, 2013 10:52:50 AM

For Alan Davies the answer is always "blue whale"

Wendypants
Female, 30-39, Canada
 2098 Posts
Tuesday, August 20, 2013 9:47:11 AM
I love QI... it's so much fun watching Alan Davies freak out when his answers are deemed incorrect when they were supposed to be truths from earlier shows. :)

Gerry1of1
Male, 50-59, Western US
 33910 Posts
Tuesday, August 20, 2013 6:07:34 AM

Next you guys will be saying Pluto is not a planet.

taylor_stone
Male, 30-39, Eastern US
 2692 Posts
Tuesday, August 20, 2013 3:54:24 AM
In a later episode, the same question is asked, and Alan (whom is the only one of the 4 panelists that is in every episode) says 2 and is given the buzzer again because Cruithne was later found to NOT be a true moon.

Vimto
Male, 40-49, Europe
 2593 Posts
Tuesday, August 20, 2013 2:08:59 AM
If i remember correctly this was all sorted out in a later series.

Draculya
Male, 40-49, Asia
 12337 Posts
Tuesday, August 20, 2013 12:22:37 AM
@5Cats "It is in orbit of BOTH the Sun and the Earth"

Nope. It is not in orbit around the earth. In fact it will not come close enough to be measurably affected by earth's gravity until a brief series of orbits around the year 2292.

That's no moon.



Gerry1of1
Male, 50-59, Western US
 33910 Posts
Monday, August 19, 2013 10:22:29 PM



5Cats
Male, 50-59, Canada
 25750 Posts
Monday, August 19, 2013 9:40:14 PM
There are several "objects" which orbit the Earth aside from the Moon (Luna).

Some only stay a little while and then zoom back into space. All are VERY small.

I see @richanddead has mentioned this.

Wiki Says: Cruithne
It is in orbit of BOTH the Sun and the Earth:



Because the Earth's gravity affects it's rotation around the Sun in a big way.

Draculya
Male, 40-49, Asia
 12337 Posts
Monday, August 19, 2013 9:31:35 PM
Not a moon. Quasi moon. Not even in earth orbit. Not the most interesting such quasi moon. Not even one of the natural temporary satellites sometimes in earth orbit.

patchouly
Male, 40-49, Canada
 4598 Posts
Monday, August 19, 2013 3:53:11 PM
I was going to mention that orbiting the Sun means it's not Earth's moon but I can see that others beat me to it.

Jake_Justus
Male, 50-59, Eastern US
 5176 Posts
Monday, August 19, 2013 2:47:35 PM

A simple rule of thumb : it's not technically a moon if it doesn't generate werewolf transformations ...


enolamron
Male, 18-29, Eastern US
 199 Posts
Monday, August 19, 2013 2:38:09 PM
Ah, but this information was corrected in a later episode of QI. He's not wrong if he corrects himself! :)

richanddead
Male, 18-29, Eastern US
 1953 Posts
Monday, August 19, 2013 2:21:49 PM
Cruithne is call earth's second moon but it is how you determine what is a moon. Earth actually has thousands of satellite rocks ranging from a pebbles to those a couple of miles across. We also have "temporary moons," such as RH120. It's who is calling a satellite object a moon. Sometimes "the Moon" is not called a moon either, and it is said that Earth and "the Moon" are binary planets with no moons.

Kain1
Male, 18-29, Europe
 1463 Posts
Monday, August 19, 2013 2:14:03 PM
oh, i see i'm too late.. oh well, no matter..

Kain1
Male, 18-29, Europe
 1463 Posts
Monday, August 19, 2013 2:13:40 PM
It's NOT a moon. It orbits the sun, not the earth. All you have to do to find that out is to go to wikipedia.

*sigh*

djwajda
Male, 40-49, Midwest US
 851 Posts
Monday, August 19, 2013 2:06:47 PM
So yes, I do mock the wonderful Stephen Fry in that his information was false.

djwajda
Male, 40-49, Midwest US
 851 Posts
Monday, August 19, 2013 2:06:02 PM
As-ter-oid


[quote">Cruithne is an asteroid in orbit around the Sun in 1:1 orbital resonance with the Earth. It is a minor planet in solar orbit that, relative to Earth, orbits in a bean-shaped orbit that ultimately effectively describes a horseshoe, and which can transition into a quasi-satellite orbit.[3"> It has been incorrectly called "Earth's second moon".[2"> Cruithne does not orbit Earth and at times it is on the other side of the Sun.[4"> Its orbit takes it inside the orbit of Mercury and outside the orbit of Mars.[4"> Cruithne orbits the Sun in about 1 year but it takes 770 years for the series to complete a horseshoe-shaped movement around the Earth.[/quote">

ryguy639
Male, 18-29, Midwest US
 2 Posts
Monday, August 19, 2013 2:01:44 PM
Cruithne does not actually orbit Earth and therefore would not be considered a moon.
http://en.wikipedia.org/wiki/3753_Cruithne

drawman61
Male, 50-59, Europe
 6048 Posts
Monday, August 19, 2013 1:44:59 PM
I see none of you dare mock the wonderful Stephen Fry and his moon story.

Gerry1of1
Male, 50-59, Western US
 33910 Posts
Monday, August 19, 2013 1:33:35 PM
Link: Cruithne [Rate Link] - How many moons do you think the Earth has? Are you sure?


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