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Questions tagged [terrestrial-planets]

compact rocky planets, in our solar system these would be Mercury, Venus, Earth & Mars

5 votes
1 answer
312 views

Geological/tectonic/thermal/etc. implications of Rayleigh numbers ≥ 100,000,000

What's a Rayleigh number? Well, it doesn't have anything to do with Rayleigh scattering. Here's a Wikipedia page on this concept, but I believe Elvira Mulyukova's and David Bercovici's Mantle ...
KEY_ABRADE's user avatar
3 votes
0 answers
24 views

What Simple and Multiple Linear and Logistic Regressions Would Be Valuable for a Celestial Mechanical Data Set for Exoplanets with Density?

I have created a celestial mechanical data set for exoplanets with density values (https://github.com/tslever/Tom_Levers_Git_Repository/blob/main/UVA/2--Linear_Models_For_Data_Science/Project_2/...
Tom Lever's user avatar
  • 191
6 votes
1 answer
96 views

Where can I find datasets for all confirmed exoplanets, terrestrial exoplanets, and Super-Earth exoplanets?

The NASA Exoplanet Archive has a Planetary Systems dataset offers celestial mechanical data for 5,197 confirmed exoplanets. The Exoplanets Catalog classifies these exoplanets as terrestrial, super-...
Tom Lever's user avatar
  • 191
6 votes
1 answer
200 views

How to know if an exoplanet is terrestrial?

NASA exoplanet archive, open exoplanet catalog and exoplanet.eu are some of the most famous catalog of exoplanet discovered by all techniques. However, all of these catalogs are missing the ...
Abdul Muhaymin -Free Palestine's user avatar
4 votes
1 answer
323 views

Why do Venus, Earth, and Mars have tall volcanoes, but the Moon, Mercury, and Io don't?

There are numerous examples of multi-kilometre tall mountains such as Maat mons on Venus, Mauna Kea on Earth, the Tharsis volcanoes on Mars. We don't find similar such examples of volcanic edifices ...
we'll see's user avatar
  • 325
1 vote
1 answer
127 views

Can a terrestrial planet orbit an icy planet (or vice versa)?

I know that the composition of planets is dependant on the equilibrium temperature at its orbit - for example, if below a certain temperature, water and other volatiles become solid, allowing them to ...
Ale Kid's user avatar
  • 31
3 votes
1 answer
297 views

Why don't we detect planets around OB stars and no terrestrial planets around A or early F stars?

Looking at an exoplanet database, I noticed that there are very few planets detected around main-sequence OBA stars, and most of them are gas giants/brown dwarfs. Why can't we detect low-mass planets ...
WarpPrime's user avatar
  • 6,684
17 votes
3 answers
4k views

Do celestial objects need to be big to have liquid water on their surfaces?

I mean no asteroid, planetoid that I am aware of has water on its surface. It is way more common to see ice in it. So I figured that the size of the celestial body has something to do with the cycle ...
inquisitor's user avatar
1 vote
1 answer
97 views

If a planet gained too many moons could the tidal forces of those moons rip the planet apart?

Or would the planet just be subject to extremely intense tidal forces instead?
Gliese's user avatar
  • 839
5 votes
1 answer
258 views

Are there other planetary systems where gas giants are on the inside to rocky planet orbits?

I understand that formation theories for gas giants suggest they should be born further away where there is more gas for them to monopolize vs the sun, and then to form Hot Jupiters they need to ...
Axion's user avatar
  • 345
1 vote
0 answers
85 views

Why does half of a planet's radius end up being the radius of the core?

This answer makes the assumption that the ratio between the radius of a planet and the radius of its core is roughly constant shortly after planetary formation. Why should this be the case? Do we know ...
usernumber's user avatar
  • 17.6k
0 votes
1 answer
628 views

What is the gaseous-to-rocky ratio of exoplanets?

Around the Sun, there are as many gaseous planets (Jupiter, Saturn, Uranus and Neptune) as there are rocky planets (Mercury, Venus, Earth and Mars). Do other stars have similar gaseous-to-rocky ...
usernumber's user avatar
  • 17.6k
7 votes
1 answer
3k views

Is there a clear-cut difference between rocky and gaseous planets?

A gas giant planet is large enough that it retains a lot of hydrogen and helium. A rocky planet is one with a solid surface. That's the rule of thumb to distinguish between the rocky and gaseous ...
usernumber's user avatar
  • 17.6k
1 vote
0 answers
48 views

Magneto tail effect on the other planet in a binary planet system

Let's say there are 2 earth sized planets orbiting each other around 750,000km apart and at a distance of roughly 1.2 AU from a sunlike star with a mass of 1.105 solar masses. Since they are binary, ...
Markitect's user avatar
  • 305
14 votes
3 answers
5k views

Are there any planets or moons denser than Earth?

Earth has the highest density out of all planets, planetoids and moons of our planetary system, and also has a higher density than the Sun. Do we know any exoplanets or moons denser than Earth?
user30007's user avatar
  • 1,236

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