All Questions
12
questions
0
votes
1
answer
227
views
Why don't scientists believe Earth's surface water came up from the mantle?
I read, periodically, that there is more water trapped in the mantle than there is in the oceans - possibly a lot more.
If so, why don't any geologists believe that Earth's surface and near-surface ...
- 5,307
0
votes
1
answer
105
views
In which Indian Institutions can I find Planetary Scientists or Planetary Geologists? [closed]
Which institutions in India provide labs and facilities for research in the field of Planetary Sciences/Planetary Geology?
- 765
6
votes
1
answer
287
views
What value of density would a planet need to be classified as a mini-Neptune?
EDIT: well, now I have more
For reference:
A terrestrial planet is a planet that is made out of silicates and metals.
A Mini-Neptune is, as far as I know, the smallest type of giant planet (arguably,...
- 267
2
votes
3
answers
1k
views
Was the young Sun cooler or hotter than it is today?
Generally, astrophysicists say that the young Sun was only about 70% as warm as today, which leads to the alleged 'Faint young Sun paradox' about how a young Earth could have been as warm as it (again,...
- 5,307
12
votes
1
answer
632
views
Is there convection in Mars' mantle?
Mars is differentiated, with a core, a mantle and a crust. There are no (longer any) plate tectonics on Mars. Does this mean there is no convection in the mantle? Could there be convection in the ...
- 17.6k
2
votes
1
answer
225
views
Caves traced in nine planets of solar system
Are there chances of caves being found or traced on other planets of the solar system?
What's the solution?
Manufacturing special telescopes for viewing or observing caves on other planets?
or
...
- 195
2
votes
2
answers
371
views
Why are we so quick to proclaim the geological inhospitability of other planets based on extremely minimal information?
Now, I'm not questioning claims that any planet in the Solar System is atmospherically or externally inhospitable, but claims made that other planets have geology that is extremely hostile to ...
- 141
4
votes
1
answer
161
views
How to calculate the thickness of the ice crust on a frozen ocean planet/moon?
How do I calculate the thickness of the upper ice layer on cold ocean worlds like Europa, Enceladus, Ganymede, ...? I'm asking this for a programm I'm currently writing.
Given/Known is: mass, radius, ...
- 171
1
vote
1
answer
170
views
Could an Earth-sized planet be cold?
This question poses the question of why the Earth is still hot after 4.5 billion years, and the primary reasons were:
(1) heat from when the planet formed and accreted, which has not yet
been ...
- 143
5
votes
1
answer
437
views
If an earthquake happens on Mars, is it still an earthquake?
Or are seismic phenomenon named differently when they happen on other celestial bodies? If so, what are they called?
- 153
6
votes
3
answers
391
views
Is extraterrestrial mining more difficult or impractical for bodies without plate tectonics?
This article talks about the possibility of mining Uranium on the moon. Since the Moon lacks the geological forces that have created veins of concentrated minerals on Earth, would extraterrestrial ...
2
votes
1
answer
433
views
How significant is a planet's density to the formation of life?
I'm doing some writing set on a fictional earthlike planet that for reasons needs to be substantially larger than Earth but can't have substantially higher gravity. I've been able to compromise with a ...
- 129