Aquatic mammals evolved on land for awhile before embracing more water bound life. This process also applies on aquatic reptiles, since the basic of reptilian evolution is for a better adaptation on land.
Is it possible or necessary for life to adopt reptilian/mammalian traits on a planet without terrestrial body?
Google search habitable moon and you get these pictures of moons orbiting gas giants but none orbiting a rocky planet. I know why this is, it's because they would have to be Earth sized moons and no rocky planet can host a moon that big. But, they could be wrong. Because there have been some estimates the largest of rocky planets could be at most 40000 km wide putting them close to the size of Neptune and a few Earth masses less than Neptune, these planets would be so big they could be too big to be habitable and at such a huge mass they might be able to have an Earth sized moon, such a planet could live in the habitable zone and since its so big it would probably have a very large magnetic field to keep this Earth sized moon safe from radiation if it doesn't have its own field. Then that moon could develop life around its dead barren giant rocky planet parent. Am I stupid or is there some possibility to this?
i mean planets with no life btw
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Hi, I'm working on a media project set in a fictional planet, and the question of the availability of gems and other precious minerals came up, I know very little about geology and chemistry so I thought it's best to ask online.
I understand that some minerals are formed from very basic elements (diamonds, rubies, amethysts, etc) and I imagine those would exist on other terrestrial planets, at the very least on planets bearing some resemblance to Earth.
But would minerals like turquoise, jadeite, or lapis lazuli, which to me look like they have very particular chemical formulas and are only found in specific localities on Earth, exist on other planets? would they have similar, but not quite exactly the same types of stone, or would they have completely different catalogues of unique minerals, depending on major or minor differences in the planets composition?
if the question is too broad to answer, then let us assume a limit of those minerals existing in terrestrial planets with a geologicaly active core/volcanism, a water cycle and a vaguely earthlike atmosphere.
Appreciate any leads you all can provide.
https://www.youtube.com/watch?v=DBr2DjUPc9U
(This may help you in your planet creation process)
Well, if it wasn't a challenge I wouldn't have brought here.
Compared to Earth, what if a planet has five times the atmosphere pressure and half the ocean coverage? What if it was smaller and hotter? What if it was bigger and colder?
I can draw a general outline of climates, of course, but I need help with the finer details such as precipitation and ocean currents, would anyone kindly help me?
They have little to no presence on Earth or Mars* unlike Mercury and Venus. Do they draw power from the Sun?
They also are absent from the gas giants. Do the Vex require a rocky surface and mantle to start their invasion/conversion of a planet?
*I know the gate exists but afaik they aren’t pouring onto the surface and making an effort to permenantly occupy the planet.
Hi!
Can terrestrial Earth-like habitable worlds have gravity less than 0,8 of Earth gravity?
Artifexian said that the atmosphere would be too thin and it wouldn't be dense enough
When did the universe have the right stuff for planets, and possibly technology and intelligence? Much earlier than we thought. This fundamentally changes some parameters in the Drake equation. Like Christopher Mellon said about SETI and UAPs, "maybe they found us first." It's a great article if you're also into astronomy and space.
https://www.space.com/17441-universe-heavy-metals-planet-formation.html
