All Questions
15
questions
27
votes
6
answers
16k
views
Does gravity get stronger the higher up you are on a mountain?
So I saw this article stating that gravity is stronger on the top on the mountain due to there being more mass under you however I have read some questions other people have asked and most of the ...
1
vote
0
answers
74
views
Find minimum radius of an asteroid before it becomes round using bulk modulus and hydrostatic equilibrium
How big must an asteroid be before gravity makes it round and hydrostatic equilibrium comes into the equation? Let's say that being a round planet requires a radius error of $\frac{\delta R}{R}$ that ...
- 11
-1
votes
1
answer
59
views
If Moon escapes to infinite distance from Earth gravity, will its gravity change?
As we know that gravity of earth influences Moon gravity and vice-versa. Suppose, Moon escapes to infinite distance where there is no other object to affect it, will we weight higher there? If yes how ...
1
vote
1
answer
150
views
Will a body as big as the moon collapse inwards if it was partially hollow?
Take a hypothetical scenario where the moon is hollow upto R=R/2
So will the moon collapse inwards as there is nothing to balance the gravitational force from outside?
- 21
0
votes
2
answers
2k
views
Range of Earth's gravitational field
We know that the acceleration due to gravity acting on a body situated h meter away from the surface of the earth is given by,
$$g' = (1 - 2h/r)g,$$ where $\,r$ = Radius of the earth ($R$) + $h$. Now ...
- 1,018
9
votes
7
answers
5k
views
If the mass of the Earth is decreasing by sending debris in space, does its angular momentum also decrease? [duplicate]
We are sending huge amount of debris into space from earth, and also very heavy satellites and rockets, then the mass of earth must be decreasing over time.
If the mass will decrease, then ...
- 213
0
votes
2
answers
165
views
How far can you pee on the moon vs. mars? [closed]
Let's suppose you are at Elon Musk's Future Mars colony and you drank too much beer, how far can you pee on Mars if you can pee one meter on earth?
If the next day you get on the shuttle to the ...
- 11
4
votes
1
answer
713
views
Would the Star Wars Death Star in a low Earth orbit be torn apart by Earth's gravity?
I got the question from this reddit comment:
Well the moon is a quarter million miles from earth. The death star would only need to be in low earth orbit to stay aloft (which according to Wiki is ...
- 497
4
votes
2
answers
2k
views
Does surface tension play a role in planet's shape?
I'm thinking that when the planets and stars were forming along with gravity surface tension also could have played a role in making them spherical.
Am I correct?
- 435
4
votes
3
answers
2k
views
What influence has the distance of the moon on the height of the tides?
As the Moon recedes from the Earth, are the tides getting taller or shorter? If the Moon is, someday, twice as far from the Earth, how many high tides will be there be each day?
3
votes
3
answers
1k
views
What would be the minimum size of a planet which would allow a human being to walk around without falling out in the open space?
On the Earth you can walk - of course we all know it - in the southern hemisphere without falling out in the open space, and you feel no difference between being at the North Pole or on the Equator.
...
- 133
4
votes
3
answers
2k
views
Are we increasing the gravity of Earth with our population?
I have these questions related to my question title:
Do we, other species and things have our own gravity?
How much Gs a human have?
Are we effecting Earth, nearby moons and planets with our gravity?
- 291
1
vote
2
answers
91
views
What conditions would allow planetary-sized objects to collide and remain intact?
I am modeling some off-the-wall scenarios to try out with a game engine.
One idea is trying to make a planet where some weird catastrophic incident has creates a funny shaped planet. I'm hoping to ...
-2
votes
1
answer
249
views
Largest size of a low gravity, Earth-like planet with Volcanoes and Earthquakes?
Provided that the Solar System consists only of Sol, a planet, and the planet's moon....
How large can my planet be so that it has low enough gravity that teenage human girls trained for jumping, are ...
- 151
3
votes
1
answer
143
views
Can a Celestial body have a mountain rise all the way to Synchronous Orbit?
On Earth, the tallest mountain is Mauna Loa. In the solar system, to date, the tallest mountain is Mons Olympus. Both fall far short of GSO.
Mars gravity is 0.376 of Earth gravity. If Mauna Loa were ...
- 4,723