Exoplanet Art

I have studied some astrobiology (just enough to understand a few major concepts).  I now realize how many different kinds of solar systems there could be.  Many are WAY different from our solar system.

For example, we don't have any "super Earths." These are between twice the size of Earth and up to 10 times its mass.

We also don't have any "mini-Neptunes." These are smaller than Neptune and bigger than Earth.

As an artists, this gives me license to just go wild and create any kinds of planetary systems I want!

I have some examples below.

Two moons orbiting a desert planet three times the mass of the earth.
All three are in the habitable zone of their sun-like star.
One of the moons has oceans and green areas.  Vegetation?

These planets were ejected from their original solar system and
have been drifting through interstellar space for millions of years. 
Now, they are passing a supernova, an exploding star.

 

Two moons orbit above a gas giant's swirling clouds.
Its blue atmosphere is made of hydrogen and helium,
with a touch of methane. The methane gives the blue color. 
The red moon is covered in active volcanoes.

More about exoplanets here: https://exoplanets.nasa.gov/what-is-an-exoplanet/overview/