Earth and Moon Gravity Well Comparison

[Vier5501]

The notion of a gravity well, when dealing with spherical objects, is incorrect. The gravity exerted by one side of the planet is matched almost perfectely by the other side, resulting in a quasi-well structure that resembles a cone in the middle that reaches back to the surface. In retrospect, this is actually true of any object, so gravity wells don't exist, with the notable exception of black holes, and other nigh infinitiley small objects that aren't large enough to have 2 noticable sides.

[Levon9404]

It looks very funny all this explanation & kind of stupid too!!

[ellaphant1]

hi

[ellaphant1]

i love it and ur voice is so fuzzy i could touch it

[ellaphant1]

tight man

[Mister006]

Can you really engage in manufacturing, in a bubble, on the moon without polluting the environment beyond the ability for human habitation? Even manufacturing outside of the closed environment, is it possible? How about smelting aluminum in space?

[tetekofa]

LMAO !!!

[MegaBharat500]

i just wnated to know gravity in some parts of eath example like in a pice of land there is a little of gravity!

[nofatchxplzthx]

i dont think those wells are portrayed accurately, the "freespace" they are taking about doesnt exist, no matter where you are in the universe, gravity somewhere always has a pull on you

[Zutraxi]

@nofatchxplzthx This is true gravity will allways try to pull you in but, the power of the pulling is rapidly dissapering as you get further and further away. forexample if you were to suddenly double your distance to the center of earths gravitationel center than the power would be divided by 4 so it will become one fourth of the previous power. Because when you calculate the power of gravity you divide by r^2.

[bbphnix]

WTF? the moons gravity is 6 times less that of Earth why the hell is the well so much smaller? 22 times? 'the fuck?.....

[dresdnhope]

@bbphnix the gravity well is the kinetic energy needed to escape orbit, which is affected by the surface gravity AND the radius of the planet or moon. The moons radius is 0.273 of the Earth's and the surface gravity is 0.165 of the Earth's 0.273*0.165=0.045, roughly 1/22 times that of Earth.

[TimJSwan89]

So the moon is 1/81 mass of earth, which means that the volume of that well is 1/81 of the earths, and, according to this video, the height is 1/22 of the height of the other one. What's the formula to get the "height" of the well ratio from knowing the mass.

[dresdnhope]

@TimJSwan89 xkcd.com/681_large/ gives the formula [Newton's Gravitation Constant * mass of object]/(earth's gravity at surface * radius of object), where the object is a planet or moon or star or whatev.

[srofficial06]

to dig a tunnel thru the center of the moon from the polar region which we observe on earth to the other polar region which we never see here on earth .Structure maintained with aluminum spars smelted rom indigenous lunar elemental aluminum. tunnel to also incorporate segmented aluminum rail and magnetic propulsion

[fvgdfbdokd]

How will we get raw materials from the moon? We have never been there (don't believe NASA's lies) and we never will because its too dangerous.

[Koujinkamu]

@fvgdfbdokd lol

[fvgdfbdokd]

@Koujinkamu Let me ask you a question. You look up in the sky, you see the moon. But how do you know it really exists? Have you been there? Nope. :)

[Koujinkamu]

@fvgdfbdokd Lots of trolls today. I'm done. Later, bro.

[charmeleon10]

@fvgdfbdokd Ok first, you're just another one that believes that NASA's expedition to the moon is a lie? All right then, I respect your opinion, but let me tell you something, NASA did go to the moon. If you have any doubts, search for the mythbusters episode on that. Also, we're just talking about NASA, the world's best and biggest "universe studying" company. They wouldn't just commit so many errors like the ones that are talked about, like the shadows and the footprint... They're NASA u know?

[yo45671]

@charmeleon10 Ya dam right!

[Peaserist]

>The moon is one small step deep

>one small step for man one giant leap for mankind

[Everyman1337]

There sure are alot of LUNAtics around here.

[erikgfrey]

Look into La Grange Points, or space elevator theory if you like that.

[EGMAG]

DOUBLE TALK

[cutewhosena96]

i don't understand !!@!!!!!!!

[pitupraveen]

sounds like Lt Commander Data narrated in this video :-)

[22Burnette]

Fantastic!

[Daavoid]

wow these curves are SOOOO exagerated. the sun looks like a black hole

[melis256]

@Daavoid

Ya I thought about that too...

[Cinnarbar]

@Daavoid In a astronomy museum they had milk cartons, that you can lift up, with weights to represent the weight of a milk carton and each planet & the sun. The sun was attached to a spring.

[joshuapooleanox]

@Siniztar88 BRAKE ITUP LADIES BRAKE IT UP!!!!!!!LOLOLOL

[lilmnm616]

@Siniztar88 lol dude yeah sure you are right im a durp and you are so win now i know your mother is proud of you. oh yeah again im sorry i keep forgetting your mom is dead )':

[lilmnm616]

@Siniztar88 oh look the adopted kid that thinks everyone is a nigger cause they are right and owned you is dumb for dumbing down the conversation so you can understand it? way to go troll you made all the people in australia proud what little there are but at least its someone lest just hope your mom is a part of that. oh yeah sorry forgot about your lose :'(

[lilmnm616]

@Siniztar88 oh well and your adopted cause your mother didnt love you just sayin

[lilmnm616]

@Siniztar88 lol nope not at all seems like you are as you gotta spam this vid with your trollness

[lilmnm616]

@Siniztar88 lol its not that you wont read its cause like most australians they cant read well as well having bad site as i am not a pile of sticks nor black so you are a successful fail troll

[lilmnm616]

@Siniztar88 sounds like you are mad to me lol also no i am not a pile of sticks i am a human you would know that if you actually had the IQ of a baby instead of a stone. also dude you need to grow up with that lame name calling its very immature and really dont do anything to anyone except little kids like you who play hard. but hey you succeeded in being a Fail-Troll. good job your mother must be very proud! oh yeah thats right shes dead. hell id kill myself to if you was my kid

[lilmnm616]

@Siniztar88 its as fake as your mother's love for you. so i guess your mother hates you. sorry you are a red headed adopted kid... sorry, better luck next time.

[kljppppp]

@Siniztar88 wtf ita a simulation HOW CAN IT BE FAKE??? wtf

[Pappyroys]

ROFL

[Tzacharu123]

Its not just moon mining that needs to be done. It's exploration of the rest of the Solar System, as well as other systems in the distant future, that needs to be done. The Sun is not infinite, and will die. The only thing that will destroy all we've worked to achieve is ourselves and nature at this point. It only makes sense for humans to look to the stars and find another place to possibly live. Earth will not be here forever, after all.

[edmfw]

@Tzacharu123 Pointless. The Earth will kill off the human race long before the Sun dies. Mass extinctions have happened many times in the past. They will happen again.



[stubbornVN]

Takes very much energy to move around. Considering a lot of energy is involved in celestial bodies moving around and it would be hard to their escape orbits. Because orbits are the natural characteristic of a body to remain approximately distanced despite being in a gravity lock. But in comparison with matter processes required at surface level on Earth it may be said a plain of movement is easy. But then gravity is easy to move in too; its just one way, thats all.

[EsheAhkura]

"Our sun produces a highly penetrating radiation in the electromagnetic spectrum. This frequency is approximately a trillion cycles a second. This frequency is located between the lower portion of the infrared and radar band. It is this radiation from the sun that causes gravity, not the planets rotation." - Alex Collier.

[rulz492]

@EsheAhkura hahaha good one

[witecracker2]

ill keep that in mind...

[eqtworld]

I thought the moon had 1/6 the mass of the Earth, not 1/22

[rulz492]

@eqtworld it's a lot less than 1/6th, you're thinking of the gravitational acceleration at its surface. The bend created in space-time by a mass is worked out with general relativity rather than newton's law. I would go into more detail but I don't know anything other than that.

[swunt10]

if you are on the moon (even in his orbit) you are still in the gravity fild of the earth.

[tomanyasses]

@swunt10 yep they tug on each other

[melfik]

1:22 ration, wow, havent known its such a difference

[leerock491]

hey srofficial06 watch the movie time machine.. lol

[kayakboyuk]

Or watch the movie 'Moon'

[srofficial06]

should we be cautious about "mining" the moon ? Does not the moon and its accompanying gravitational influences provide us earthers with the tides for the oceans and would it be fair to characterize the moon as an integrel " part " of the clockwork that allows us to exist here on earth ? Im not saying you mustnt mine the moon I think however it should be a " balanced" proposition as with any mathematical equation ?

[bja6a]

I doubt that humans will be able to take enough material off the moon in the near future to affect the tides or anything else.

[lacanau]

@bja6a I can remember people saying that the consumption of natural gas would have no significant effect on earth too

[danishterminator]

though the moon is small compared to the earth, it is still huge compared to what amounts of mass we will be able to mine for the forseeable future. we'll only be scratching the surface.

[savagedias]

Good point but I'm sure we would counter that with the garbage we would leave behind. Maybe depleted uranium from earth could be stored there.

[TGGeko]

@srofficial06 There's no way we would be able to mine enough material from the moon to have any significant effect.

[sirachman]

Awesome video! This will really come in handy.