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Re: Was planet Mercury ever Venus' moon???

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65LegoZiller65 is not online. 65LegoZiller65
Joined: 07 Apr 2010
Total Posts: 819
18 Mar 2015 06:24 PM
This might sound crazy people, but I thought of a theory that Mercury was once a moon of Venus. Here's how; so our moon moves away from us I don't even know how many inches or centimeters ever year, that happens with every single moons of planets. Haven't you think that Mercury was once Venus' moon pulled apart from Venus' gravity due to that natural process of movement? I mean think about it. Our moon moves away from us some centimeters or inches each year. Same with Mercury, it might have been pulled away from Venus, making Venus what it is right now. I think this is very likely to be true. Mercury even has the same composition as our moon does, but it also has iron due to the fact that it is so close to the sun that it just creates some other material on it's surface and because the Sun's radiation creating stuff on it.

Another theory, Mercury could have been a remnant of a gas planet. If you look at other gas planets such as Saturn or Jupiter, it's core is made of iron and rock. Same goes with Mercury, but Mercury's surface is stripping away due to the heat it gets from the sun. And because of that, Mercury's atmosphere stripped away due to the amount of heat because of how close Mercury is to the sun.

Anyone want to take a theory of this and add on or give feedback? This both are extremely likely to have had happen.
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HimemiKimiko is not online. HimemiKimiko
Joined: 13 Nov 2014
Total Posts: 381
18 Mar 2015 06:26 PM
I like this guy.
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65LegoZiller65 is not online. 65LegoZiller65
Joined: 07 Apr 2010
Total Posts: 819
18 Mar 2015 06:30 PM
Uh thanks..
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iiNerdii is not online. iiNerdii
Joined: 08 Apr 2011
Total Posts: 5343
18 Mar 2015 06:31 PM
our moon won't ever end up leaving earth's orbit because the sun will die off before then, and humanity may be dead before we can even be close to it escaping

bwahaha
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LionheartV3 is not online. LionheartV3
Joined: 26 Jan 2013
Total Posts: 2114
18 Mar 2015 06:32 PM
Mercury is a planet
Venus is a planet
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wattati is not online. wattati
Joined: 14 Aug 2011
Total Posts: 2076
18 Mar 2015 06:32 PM
i believe in the gas one
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65LegoZiller65 is not online. 65LegoZiller65
Joined: 07 Apr 2010
Total Posts: 819
18 Mar 2015 06:36 PM
You don't know the classification of a moon. Mercury is too small to be classified as a planet. It has all the composition of a moon, it's like just liquid metal evaporating due to it being so close to the Sun. Look at Io, that's a great example. Jupiter is like it's own solar system.
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iiNerdii is not online. iiNerdii
Joined: 08 Apr 2011
Total Posts: 5343
18 Mar 2015 06:42 PM
mercury is nearly 1/4 the size of earth larger than pluto

to be a planet, a planet has to
-Orbit around a star
-Have enough gravitational force to pull itself into an approximately spherical shape
-Have enough gravity to "clear its neighbourhood", meaning that all of the other space crap in its orbital path has to be absorbed into it.

pluto got turned into a dwarf planet because of the third reason

bwahaha
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lagio is not online. lagio
Joined: 16 Jan 2010
Total Posts: 10296
18 Mar 2015 06:42 PM
@iiN

It moves away pretty fast relatively. We will no longer have full solar eclipses in 400 million years.
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iiNerdii is not online. iiNerdii
Joined: 08 Apr 2011
Total Posts: 5343
18 Mar 2015 06:44 PM
"It moves away pretty fast relatively. We will no longer have full solar eclipses in 400 million years."

yes, but that still doesn't mean that the moon will be anywhere near leaving the earth's orbit

bwahaha
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Mantine55 is not online. Mantine55
Joined: 01 Jul 2010
Total Posts: 8417
18 Mar 2015 06:44 PM
um hi this is one of my favorite trivia tidbits

scientists hypothesize jupiter has a core of metallic hydrogen
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CyanideCyanMeeM is not online. CyanideCyanMeeM
Joined: 30 Jul 2013
Total Posts: 3080
18 Mar 2015 06:44 PM
you could have a planet the size of a tennis ball and its still a planet. its how it works; pluto has stuff in its way and its orbit is way off
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65LegoZiller65 is not online. 65LegoZiller65
Joined: 07 Apr 2010
Total Posts: 819
18 Mar 2015 06:46 PM
i just would like to hear some of your guys' theory, because this topic is very interesting to know about.
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iiNerdii is not online. iiNerdii
Joined: 08 Apr 2011
Total Posts: 5343
18 Mar 2015 06:48 PM
@mantine cool story bro

@cyan

an object the size of a tennis ball can't posses a strong enough field of gravity to be a planet

bwahaha
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JulianHallstrom is not online. JulianHallstrom
Joined: 29 Apr 2012
Total Posts: 2765
18 Mar 2015 06:50 PM
You're right, that does sound crazy.
Especially considering everything was created by the Flying Spaghetti Monster at once.
He boiled for your sins.
R'amen.
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IridiumFlare is not online. IridiumFlare
Joined: 03 Feb 2009
Total Posts: 18587
18 Mar 2015 06:54 PM
"Mercury is too small to be classified as a planet."

Then explain why it's classified as a planet by the IAU?
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Catzilla99 is not online. Catzilla99
Joined: 15 May 2011
Total Posts: 32175
18 Mar 2015 06:56 PM
"an object the size of a tennis ball can't posses a strong enough field of gravity to be a planet"

there is no gravity requirement, only that it clears any debris in its path and that it has a spherical shape

[audience laffs]
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lagio is not online. lagio
Joined: 16 Jan 2010
Total Posts: 10296
18 Mar 2015 06:57 PM
if the tennis ball was black hole material it'd swallow the damn sun
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tanlord173 is not online. tanlord173
Joined: 25 Nov 2009
Total Posts: 3916
18 Mar 2015 06:58 PM
As a free-lancing astronomer, I would say OP might have a point. Mercury is relatively just a little bigger then our own moon - I wouldn't be surprised if that's the case. However, if that's the case, we would have to take into consideration if Mars was ever Jupiter's moon.
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IridiumFlare is not online. IridiumFlare
Joined: 03 Feb 2009
Total Posts: 18587
18 Mar 2015 07:03 PM
"if the tennis ball was black hole material it'd swallow the damn sun"

No, black holes aren't made of a specific material. If Mercury would be compressed to a radius of 490.2 µm it would form a black hole that would have no affect on the rest of the solar system.
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IridiumFlare is not online. IridiumFlare
Joined: 03 Feb 2009
Total Posts: 18587
18 Mar 2015 07:04 PM
"As a free-lancing astronomer, I would say OP might have a point. Mercury is relatively just a little bigger then our own moon - I wouldn't be surprised if that's the case. However, if that's the case, we would have to take into consideration if Mars was ever Jupiter's moon."

How would you explain it lowers its orbit so much then?
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iiNerdii is not online. iiNerdii
Joined: 08 Apr 2011
Total Posts: 5343
18 Mar 2015 07:04 PM
"there is no gravity requirement, only that it clears any debris in its path and that it has a spherical shape"

it needs to be able to absorb anything in its orbital path which requires gravity

bwahaha
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JeSuisCharlie is not online. JeSuisCharlie
Joined: 07 Jan 2015
Total Posts: 770
18 Mar 2015 07:05 PM
Unless you have a degree in cosmology, astronomy, or astrophysics, I don't really care about your opinion.
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tanlord173 is not online. tanlord173
Joined: 25 Nov 2009
Total Posts: 3916
18 Mar 2015 07:08 PM
@irid
I said take into mind. As an asteroid belt separates the 2, I wouldn't say it's NECESSARILY an old moon of Jupiter. It could however in the early system have been knocked out of it's orbit but was brought into the Sun's gravitational field to allow it to orbit independently.
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IridiumFlare is not online. IridiumFlare
Joined: 03 Feb 2009
Total Posts: 18587
18 Mar 2015 07:16 PM
"I said take into mind. As an asteroid belt separates the 2, I wouldn't say it's NECESSARILY an old moon of Jupiter. It could however in the early system have been knocked out of it's orbit but was brought into the Sun's gravitational field to allow it to orbit independently."

So you have no explanation, your hypothesis is incorrect.

"it needs to be able to absorb anything in its orbital path which requires gravity"

A tennis ball sized sample of neutronium would be 3.298x10^13 kg.
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