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Results tagged with planetary-science
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user 7062
The study of planets, asteroids, comets, etc, including weather, geology, composition, etc. This tag should be used when the focus of the question is on the the science of a non-Earth non-star natural object, and not used when designing spacecraft to cope with said challenges.
12
votes
Habitable rocky exoplanet with radius 2 times of Earth but similar surface gravity
For such a planet to exist, twice Earth radius and similar gravity to Earth would mean the average density of the planet would be nearly half that of Earth. (see below)
Earth's average density is 5.51 …
- 13.3k
4
votes
Accepted
Possible explanations to a negative correlation between iron (Ferromagnetic) and magnetic fi...
Not all iron minerals are magnetic. Their magnetic properties vary from weak, through medium to strong. The Curie point determines whether an allotrope of iron is magnetic. If the Curie point is below …
- 13.3k
5
votes
Could there be caves/underground tunnels in Venus?
From what we know, Venus is still a geologically and volcanically active planet. Because of this volcanic activity, Lava tubes exist on the Venus.
A study published in 2020 states, it ...
identified …
- 13.3k
3
votes
Accepted
Do the size of rocky planets determine how hot they are inside?
You idea is supported by this source, which states:
Of the terrestrial planets in our solar system, Earth has the most internal heating because it is the most massive.
It is speculated that Venus al …
- 13.3k
3
votes
Accepted
Is the crust of the Moon different on the near side and the far side?
A couple of interesting hypotheses are given for the difference in Why Do We Have a Two-Faced Moon?
Both hypotheses stem from a small planet colliding with Earth - The Giant Impact Hypothesis followed …
- 13.3k
6
votes
Accepted
The Surface of Mars
The surface features on Mars are still present because of their resistance to erosion, the magnitude of erosive forces and geological inactivity on Mars: no active volcanoes, no plate tectonics and ne …
- 13.3k
16
votes
Accepted
What causes moonquakes?
You are correct about some of the sources of moon quakes.
NASA states there are are least four types of moon quakes:
There are at least four different kinds of moonquakes: (1) deep moonquakes abo …
- 13.3k
2
votes
What is the largest possible rocky body?
An article from 2016, yes old, stated that it was once thought any planet with a radius about 1.6 that of the Earth would become a gas giant, based the 2015 paper, Leslie A. Rogers, MOST 1.6 EARTH-RAD …
- 13.3k
2
votes
How does Mars have a Bow Shock and proton aurora? What is a hydrogen corona?
A stellar corona is the outermost layer of a star's atmosphere.
A geocorona is,
the outermost part of the earth's atmosphere consisting primarily of hydrogen.
Hydrogen corona's have been found on Ma …
- 13.3k
4
votes
Is crater counting accurate for relative dating between celestial bodies?
Crater density dating is used for each celestial object individually. A higher density for a particular object, say the Moon, implies that region of the Moon is older than a region on the Moon with a …
- 13.3k
3
votes
If a high-temperature melt of lunar soil cooled slowly, what layers might appear?
The concentration of metals with the regolith will be critical a factor to the amount of effort, energy required and regolith required.
The other important factors will be what other metals will be i …
- 13.3k
3
votes
Why does the Moon's Anaxagoras crater seem sort of jumbled?
There have been a few internet post about the Anaxagoras Crater, on the Moon.
Regarding the central peaks, the floor of the crater has "a section of the anorthositic central peak complex". Anorthosite …
- 13.3k
4
votes
How deep could a lunar mine go?
A point of correction – me being pedantic.
Mine shafts on earth are limited in how deep they can go by two
things, internal heat and rock pressure.
This is not correct. Remove the word shafts and ye …
- 13.3k
6
votes
Accepted
Any additional information required for colonising these rocky solar system bodies?
In addition to solar radiation/wind, cosmic radiation.
Regarding surface conditions (soil) you will need consider:
Potential nutrients for plants as well as toxins for plants, humans
and other animal …
- 13.3k
17
votes
Is there dirt or its structural equivalent on Mars?
The fine regolith on Mars is regarded as being the closest equivalent to an Earth like soil. It contains sand and dust. Clay deposits have been found. The two could be mixed to produce a more graded m …
- 13.3k