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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 ...
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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,...
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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? ...
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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, ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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....
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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  • 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 ...
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  • 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 ...
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