16
votes
Would a lower gravity planet have deeper oceans and higher continents?
Let's use our Solar System as sample to verify if planets with lower gravity have higher mountains, looking at the highest mountains in it.
Name
Height
Location (surface gravity $m/s^2$)
Olympus ...
- 238k
14
votes
Would a lower gravity planet have deeper oceans and higher continents?
Looking into your question, I found this at the Astronomy Stack Exchange: Does a planet's mass or gravity affect the height of it's mountains?.
There's some mathematical and scientific things in there,...
- 151
11
votes
Can Mars disintegrate entirely in this scenario?
One part of the question says:
Before the fly-over, Mars's rotation can be accelerated to up to 1 Martian day per hour if that helps Mars to disintegrate.
Would that help Mars break up into pieces?
...
- 23.8k
8
votes
Accepted
Metallurgy at different gravity strengths
No.
The rate of convection depends on the acceleration of heated air. Air heated to a given temperature is of reduced density, and buoyancy causes it to rise. Less gravity reduces the buoyancy, ...
- 1,166
7
votes
What problems will an intelligent species on a low gravity planet face advancing to space exploration?
Acceleration
For the most part, making a rocket that can reach space is exponentially easier the less gravity you have. At 0.6G you will still have no problem building gravity assisted machines. ...
- 64.1k
7
votes
Can a Birch planet send information out?
If the planet it's outside the event horizon of the black hole, it can send communication outside of it.
However whoever receives it will see it extremely red shifted, due to the distortion caused by ...
- 238k
5
votes
What problems will an intelligent species on a low gravity planet face advancing to space exploration?
In general, a smaller planet is significantly easier to launch from. However, that's not quite the same as saying a lower-surface-gravity planet is necessarily easier to launch from.
The first thing ...
- 1,166
4
votes
How might a lower gravity planet sustain a warm, earth-like atmosphere?
More atmosphere
https://www.coursehero.com/study-guides/astronomy/the-massive-atmosphere-of-venus/
...as percentages, the proportions of the major gases are very similar
for Venus and Mars, but in ...
- 273k
4
votes
If Earth was less massive, with 25% less gravity and an atmosphere scaled down proportionately, how would that affect climate?
If Earth had the same diameter and it's mass was reduced by 25 percent, its gravity would also be reduced by 25 percent, but it escape velocity would be 86.6 percent what it is now.
To put that into ...
- 2,940
4
votes
Can a Birch planet send information out?
SIGNAL CORRUPTED
It is impossible to send information from inside (the event horizon of) a black hole to outside. So build your shell planet outside the event horizon to allow messaging other planets....
- 38.6k
4
votes
Accepted
Can Mars disintegrate entirely in this scenario?
Yes, and no need to introduce fast rotation, or nukes or anything similar.
The Roche limit for liquid bodies is $d=2.544R \sqrt[3]{\frac{\rho_M}{\rho_m}}$, where $R$ is the radius of the more massive ...
- 274
2
votes
Can moon people generate electricity using a gravity dynamo that is turned by the gravity of their host planet?
Energy conversion
Electricity is produced by conversion of some other form of energy (mechanical, chemical, solar, thermal etc.) into it. Tidal waves have mechanical energy.
Tides
Tides are produced ...
- 3,905
2
votes
Would 25% less gravity produce dramatic differences in animal morphology?
Everything weight only 3/4 as much as the same mass would on Earth.
Thus, for a given mass that must be supported, and constant material strength, compressive structures can be about 87% small in ...
- 34.2k
1
vote
Would larger oceans stabilize temperature on a smaller planet with a thinner atmosphere?
Winds reach all parts of land and sea
In hot area (land or sea), air heats up, expands, raises up and lets cold air blow from sides. This causes sea breeze, land breeze, winds etc. to regulate ...
- 3,905
1
vote
Would 25% less gravity produce dramatic differences in animal morphology?
Here is a frame challenge to the idea that 75 percent of Earth's surface gravity is the minimum possible for a planet that can keep a dense atmosphere for geological eras of time.
Part One: the ...
- 23.8k
1
vote
Would a lower gravity planet have deeper oceans and higher continents?
It can do. There are a couple of other variables you may want to consider as well as gravity: temperature and level of volcanic activity.
Anything large enough to be classed as a dwarf planet by ...
- 111
1
vote
Would a lower gravity planet have deeper oceans and higher continents?
Looking at Mars, which has lower gravity than Earth, the crust does seem to be more uneven. It's home to both Valles Marineris, the deepest canyon in the solar system, and Olympus Mons, the highest ...
- 157
1
vote
Can a Birch planet send information out?
A Birch planet cannot be natural, it is a megastructure that compares to a giant Dyson Sphere. Suppose your civilization would be able to create a Dyson Sphere the size of Neptune's orbit, it needs ...
- 12.1k
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