Earth's other moons

Some related small keywords, sorted, duplicates out:

'Quasi' Moon Discovered Orbiting Earth [06/16/2016]
Earth's other 'moon' and its crazy orbit could reveal mysteries of the solar system [02/26/2015]
Hunting for "Minimoons" Orbiting Earth [09/02/2014]
Mystery Mini Moons: How Many Does Earth Have? [02/10/2013]
Earth Must Have Another Moon, Say Astronomers [12/22/2011]
Earth's "Other Moon" [04/17/2007]
Say hello to our new moon [03/29/2004]
ODD ASTEROID [04/15/2003]
Cat-And-Mouse Asteroid Pulls Close To Earth [01/04/2003]
Cat-and-mouse asteroid nears Earth [01/03/2003]
Earth's Little Brother Found [10/21/2002]
New 'Moon' Found Around Earth [09/11/2002]
Near danger? Then why this international apocalyptic asteroid impact drill right now [04/27/2021]
The Largest Asteroid to Pass Earth This Year Is Rapidly Approaching [03/12/2021]
A car-sized asteroid made the closest Earth flyby a space rock has ever survived [08/18/2020]
Massive 2,034-foot asteroid will zoom past Earth just after Christmas [12/22/2019]
NASA emails reveal agency's surprise at asteroid's near-miss of Earth [09/19/2019]
Look Up! You Might Be Able to See a Green Comet Tonight [08/07/2018]
Surprise! Earth Passing Asteroid 1998 QE2 Has a Moon [05/30/2013]
Asteroid may have killed dinosaurs quicker than scientists thought [02/10/2013]
Asteroid 2005 YU55 to Approach Earth on November 8, 2011.. [03/25/2011]
In the shadow of the Moon [08/31/2004]
Probe To 'Look Inside' Asteroids [07/28/2004]
Reworked images reveal hot Venus [01/14/2004]
NASA says Mystery Object Orbits Earth [09/20/2002]
There and Back Again: Apollo 12 part spotted? [09/12/2002]

https://www.google.com/search?q=Earth+moons&tbm=vid

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Bmk.

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"The moon might not be the earth's only moon. It all depends on your point of view".

Sort of like how Obi-wan can tell Luke that Darth Vader killed his father Anakin, when actually Obi-wan chopped Anakin's arms and legs off and left him to die on a lava planet. And then stole his light saber.

That makes no sense. Joke?

You never saw Star Wars episode VI?

Episode III, rather. That chronological order thing is confusing.

Transcript
0:00 foreign
0:03 the vastness of space might make the
0:05 earth look a little lonely in its
0:07 Journey around the Sun but our planet is
0:09 far from alone it has us for better or
0:11 worse and the thousands of human-made
0:14 satellites we've thrown up into orbit
0:15 and it's had one constant companion
0:18 these past four and a half billion years
0:20 the moon but it turns out that the moon
0:23 might not be the Earth's only Moon it
0:26 all depends on your point of view first
0:28 we should set up some terminology moon
0:30 is a weird word with a fuzzy definition
0:33 the international astronomical Union or
0:35 iau are the Arbiters of naming things
0:37 that are up there you might know them as
0:39 the ones who kicked Pluto out of the
0:40 planet Club back in 2006 and according
0:43 to the iau there is only one Moon around
0:46 the earth that's the big bright gray
0:48 thing in the sky that we are all
0:49 familiar with and its name is spelled
0:51 with a capital M the moon any other
0:54 solid object that orbits a planet dwarf
0:56 planet or any other rock that orbits the
0:58 Sun is called technically a natural
1:00 satellite so the moons that Galileo
1:03 discover covered around Jupiter in the
1:04 early 1600s and the dinky potato-shaped
1:07 moons in orbit around Mars and all of
1:09 the other moons in the solar system that
1:10 aren't the Earth's traveling but he
1:12 technically not moons at least according
1:15 to the iau they do however accept that
1:17 most people call those things moons
1:19 anyway just with a lowercase M so feel
1:22 free to debate with your friends if the
1:24 following satellites are some of Earth's
1:27 other moons anywhere the earth goes in
1:29 its orbit it is by far the most massive
1:32 object so it tends to dominate the scene
1:34 gravitationally speaking that means
1:36 either pulling smaller space rocks into
1:39 itself ending up in a fiery death or
1:41 into orbit around itself sometimes that
1:44 orbits just literally a single loop
1:46 around before the rock escapes back out
1:48 into the solar system sometimes it
1:50 sticks around for a few more Loops that
1:52 only happens for rocks that get close
1:54 enough to the Earth close enough that
1:56 the Earth's gravity becomes more
1:57 important than the gravity of other
1:59 bodies in the solar system mostly the
2:01 sun astronomers call that region of
2:03 space the hill sphere technically every
2:06 object in the solar system has one but
2:08 the more massive the object the larger
2:10 the hill sphere the Earth is about three
2:12 million kilometers across about four
2:14 times larger than the distance between
2:15 the Earth and the capital am a moon so
2:18 if there's something small hanging in an
2:20 object's Hill sphere even if it's just
2:22 one orbit you can think of it as a
2:24 lowercase M Moon while it is there in
2:27 fact there is an unofficial term for
2:29 these temporary satellites many moons
2:31 and astronomers can use the size of
2:33 Earth's Hill sphere and the abundance of
2:36 space rocks in the neighborhood to
2:37 calculate how often our planet can
2:39 capture a Mini Moon back in 2012 one
2:42 international team crunched the numbers
2:43 and found that in an average year one
2:46 new natural satellite about a meter
2:48 across will come join us on average it
2:51 will stick around for nine months before
2:53 spiraling down to earth and burning up
2:55 in the atmosphere or getting flung
2:57 further afield the latest one was
2:58 observed back in 2020 we even covered
3:00 its Discovery in a previous episode
3:02 given their short lifespan fans these
3:04 mini moons might not seem as moon-like
3:05 as quasi-satellites quasi-satellites are
3:08 space rocks that stay floating beyond
3:09 the Earth's Hill sphere but their orbits
3:11 around the Sun always keep them close
3:13 enough to Earth that from our
3:15 perspective down here they appear to
3:17 hang out like our capital and moon does
3:19 astronomers have found five of these
3:21 quasi-satellites so far each measures
3:23 roughly a few hundred meters across the
3:25 most recent one discovered back in 2016
3:27 is called komoa Leva simulations of its
3:30 orbit suggest it's been around for at
3:32 least a century and will stick around
3:34 for even longer sure that pales in
3:36 comparison to the capital M moons four
3:38 and a half billion years but it's a lot
3:40 longer than the many moons we've talked
3:42 about so far and in 2021 one team
3:44 proposed that kamoa Leva might have come
3:46 from the Moon itself after a collision
3:49 chipped it off now if you don't think
3:50 any of these are moons because they're
3:52 too small you're gonna love our final
3:54 example A mysterious cloud of dust that
3:57 might share the moon's orbit or a
3:59 special place in the moon's orbit when
4:01 you have two orbiting bodies like the
4:03 sun in the Earth or the Earth and the
4:05 moon there are a few locations where
4:06 their gravitational influences kind of
4:08 cancel out these are called LaGrange
4:10 points and two of them called L4 and L5
4:13 are located off to the side of the
4:15 smaller body it is these points that
4:17 intrigued a Polish astronomer named
4:18 casimir's cordelewski back in the 1960s
4:21 he published a paper claiming that he
4:23 saw bright spots at the Earth Moon L5
4:26 Point indicating that some kind of dust
4:29 was hanging out there unfortunately for
4:30 him nobody took that claim very
4:32 seriously most astronomers thought that
4:34 anything that tried to settle down in
4:36 one of these two points would quickly
4:37 get ejected by collisions with energetic
4:40 particles streaming through space or by
4:42 the Sun's gravity but in 2018 a team of
4:45 Hungarian astronomers came to a
4:46 different conclusion they modeled the
4:48 four body Earth Moon Sun and Cloud Moon
4:51 system and found that these points would
4:53 be stable for at least a month maybe
4:55 even years but they also went looking
4:57 for physical evidence of cordelowski's
5:00 cloud moons sharing the moon's orbit and
5:02 they did find some the presence of
5:04 polarized light coming from L5 suggests
5:06 some amount of dust is hanging out there
5:09 and if there's a clump of dust following
5:11 the moon in its orbit around Earth well
5:13 then you just might be able to call that
5:15 Clump a moon of sorts you know if you
5:18 really want to poke at those astronomers
5:20 in the iau whether or not a cloud moon
5:22 really does exist the stability of these
5:24 L4 and L5 points brings up an intriguing
5:26 possibility what if we could tow an
5:28 asteroid there and park it astronomers
5:31 could get the chance to study an
5:32 asteroid up close for decades while More
5:35 industrial-minded Humans mind it for
5:37 resources while nowhere close to a
5:39 reality yet this is a serious
5:40 consideration from space agencies after
5:43 all while the iau says that we only have
5:45 one capital M Moon who says we can't add
5:48 a couple more small M ones but maybe one
5:50 thing that's got you thinking about what
5:52 would happen if the Earth had a much
5:53 larger second moon than a small asteroid
5:56 something similar to the Moon in size
5:58 what would that mean for life on Earth
6:00 well it's your lucky day we've got an
6:02 episode about that over on our main
6:03 Channel all ready for you right now
6:05 check it out here and thanks for staying
6:07 curious
6:08 [Music]

It doesn’t relate to the video linked above.

Do any of these captured asteroids stay more than one or two solar orbits ?

Fascinating nevertheless thanks

I was ignorant

Thanks for the transcript, SunkenCiv!

I think I'll spare myself the video.

A sixth-grader could have generated those ramblings.

Regards,

OK, this is why I'd suck as a stand up comedian. In Episode IV Obi-wan tells Luke Skywalker that Darth Vader killed his father (Anakin), but later in episode VI tells him that it's only from a "certain point of view", since Darth Vader was his father. But then in episode III it was shown that Anakin became Darth Vader only after Obi-wan cut him down with a light saber left him to die. Any of that make sense?

Yeah, that part about you’d suck as a stand up comedian. ;^)

BTW, hadn’t Anakin already murdered all the jedi children by that time?

Yeah, Anakin had already murdered the jedi children, and he'd already been named Darth Vader by Palpatine, so I guess my analogy isn't perfect.

Also, as far as my "from a certain point of view" reference goes, the video basically says that it depends on your point of view whether a temporary object with an unstable orbit constitutes a moon. In mine it doesn't, but that's just me.

The links to earlier topics about this will lead to the answer — short answer is yes.

Quasi-satellite may be better, they are temporary moonlets.

We should try to trap a moon for the Moon.

It could be a Moon moon.

Transcript
0:00	foreign
0:03	the vastness of space might make the
0:05	earth look a little lonely in its
0:07	Journey around the Sun but our planet is
0:09	far from alone it has us for better or
0:11	worse and the thousands of human-made
0:14	satellites we've thrown up into orbit
0:15	and it's had one constant companion
0:18	these past four and a half billion years
0:20	the moon but it turns out that the moon
0:23	might not be the Earth's only Moon it
0:26	all depends on your point of view first
0:28	we should set up some terminology moon
0:30	is a weird word with a fuzzy definition
0:33	the international astronomical Union or
0:35	iau are the Arbiters of naming things
0:37	that are up there you might know them as
0:39	the ones who kicked Pluto out of the
0:40	planet Club back in 2006 and according
0:43	to the iau there is only one Moon around
0:46	the earth that's the big bright gray
0:48	thing in the sky that we are all
0:49	familiar with and its name is spelled
0:51	with a capital M the moon any other
0:54	solid object that orbits a planet dwarf
0:56	planet or any other rock that orbits the
0:58	Sun is called technically a natural
1:00	satellite so the moons that Galileo
1:03	discover covered around Jupiter in the
1:04	early 1600s and the dinky potato-shaped
1:07	moons in orbit around Mars and all of
1:09	the other moons in the solar system that
1:10	aren't the Earth's traveling but he
1:12	technically not moons at least according
1:15	to the iau they do however accept that
1:17	most people call those things moons
1:19	anyway just with a lowercase M so feel
1:22	free to debate with your friends if the
1:24	following satellites are some of Earth's
1:27	other moons anywhere the earth goes in
1:29	its orbit it is by far the most massive
1:32	object so it tends to dominate the scene
1:34	gravitationally speaking that means
1:36	either pulling smaller space rocks into
1:39	itself ending up in a fiery death or
1:41	into orbit around itself sometimes that
1:44	orbits just literally a single loop
1:46	around before the rock escapes back out
1:48	into the solar system sometimes it
1:50	sticks around for a few more Loops that
1:52	only happens for rocks that get close
1:54	enough to the Earth close enough that
1:56	the Earth's gravity becomes more
1:57	important than the gravity of other
1:59	bodies in the solar system mostly the
2:01	sun astronomers call that region of
2:03	space the hill sphere technically every
2:06	object in the solar system has one but
2:08	the more massive the object the larger
2:10	the hill sphere the Earth is about three
2:12	million kilometers across about four
2:14	times larger than the distance between
2:15	the Earth and the capital am a moon so
2:18	if there's something small hanging in an
2:20	object's Hill sphere even if it's just
2:22	one orbit you can think of it as a
2:24	lowercase M Moon while it is there in
2:27	fact there is an unofficial term for
2:29	these temporary satellites many moons
2:31	and astronomers can use the size of
2:33	Earth's Hill sphere and the abundance of
2:36	space rocks in the neighborhood to
2:37	calculate how often our planet can
2:39	capture a Mini Moon back in 2012 one
2:42	international team crunched the numbers
2:43	and found that in an average year one
2:46	new natural satellite about a meter
2:48	across will come join us on average it
2:51	will stick around for nine months before
2:53	spiraling down to earth and burning up
2:55	in the atmosphere or getting flung
2:57	further afield the latest one was
2:58	observed back in 2020 we even covered
3:00	its Discovery in a previous episode
3:02	given their short lifespan fans these
3:04	mini moons might not seem as moon-like
3:05	as quasi-satellites quasi-satellites are
3:08	space rocks that stay floating beyond
3:09	the Earth's Hill sphere but their orbits
3:11	around the Sun always keep them close
3:13	enough to Earth that from our
3:15	perspective down here they appear to
3:17	hang out like our capital and moon does
3:19	astronomers have found five of these
3:21	quasi-satellites so far each measures
3:23	roughly a few hundred meters across the
3:25	most recent one discovered back in 2016
3:27	is called komoa Leva simulations of its
3:30	orbit suggest it's been around for at
3:32	least a century and will stick around
3:34	for even longer sure that pales in
3:36	comparison to the capital M moons four
3:38	and a half billion years but it's a lot
3:40	longer than the many moons we've talked
3:42	about so far and in 2021 one team
3:44	proposed that kamoa Leva might have come
3:46	from the Moon itself after a collision
3:49	chipped it off now if you don't think
3:50	any of these are moons because they're
3:52	too small you're gonna love our final
3:54	example A mysterious cloud of dust that
3:57	might share the moon's orbit or a
3:59	special place in the moon's orbit when
4:01	you have two orbiting bodies like the
4:03	sun in the Earth or the Earth and the
4:05	moon there are a few locations where
4:06	their gravitational influences kind of
4:08	cancel out these are called LaGrange
4:10	points and two of them called L4 and L5
4:13	are located off to the side of the
4:15	smaller body it is these points that
4:17	intrigued a Polish astronomer named
4:18	casimir's cordelewski back in the 1960s
4:21	he published a paper claiming that he
4:23	saw bright spots at the Earth Moon L5
4:26	Point indicating that some kind of dust
4:29	was hanging out there unfortunately for
4:30	him nobody took that claim very
4:32	seriously most astronomers thought that
4:34	anything that tried to settle down in
4:36	one of these two points would quickly
4:37	get ejected by collisions with energetic
4:40	particles streaming through space or by
4:42	the Sun's gravity but in 2018 a team of
4:45	Hungarian astronomers came to a
4:46	different conclusion they modeled the
4:48	four body Earth Moon Sun and Cloud Moon
4:51	system and found that these points would
4:53	be stable for at least a month maybe
4:55	even years but they also went looking
4:57	for physical evidence of cordelowski's
5:00	cloud moons sharing the moon's orbit and
5:02	they did find some the presence of
5:04	polarized light coming from L5 suggests
5:06	some amount of dust is hanging out there
5:09	and if there's a clump of dust following
5:11	the moon in its orbit around Earth well
5:13	then you just might be able to call that
5:15	Clump a moon of sorts you know if you
5:18	really want to poke at those astronomers
5:20	in the iau whether or not a cloud moon
5:22	really does exist the stability of these
5:24	L4 and L5 points brings up an intriguing
5:26	possibility what if we could tow an
5:28	asteroid there and park it astronomers
5:31	could get the chance to study an
5:32	asteroid up close for decades while More
5:35	industrial-minded Humans mind it for
5:37	resources while nowhere close to a
5:39	reality yet this is a serious
5:40	consideration from space agencies after
5:43	all while the iau says that we only have
5:45	one capital M Moon who says we can't add
5:48	a couple more small M ones but maybe one
5:50	thing that's got you thinking about what
5:52	would happen if the Earth had a much
5:53	larger second moon than a small asteroid
5:56	something similar to the Moon in size
5:58	what would that mean for life on Earth
6:00	well it's your lucky day we've got an
6:02	episode about that over on our main
6:03	Channel all ready for you right now
6:05	check it out here and thanks for staying
6:07	curious
6:08	[Music]