All these worlds...

[raymoh]

The last aeon

This hypothetical Earth-like exoplanet with three moons orbits a sun-like star together with several other planets.
However, the system is 2 billion years older than the solar system.
Since its formation, the parent star has already become twice as bright and is slowly moving out of the main sequence.
Due to the increasing deterioration of living conditions on the planet the higher plants and animals became extinct more than a billion years ago. Only lichen-like life forms can still withstand the current hot conditions on the surface.
The oceans that once existed have evaporated apart from a few small remnants. A few algae-like organisms still survive there.
In the cloudless sky, only the occasional high-flying ice crystal cloud remains.
There is hardly any oxygen left in the atmosphere as most of the oxygen producers have already died out. Due to the increasing radiation pressure of the brightening sun, the atmosphere will probably be completely destroyed in the next billions of years and swept into space.

We are standing at the hot and shadeless bottom of a former ocean and can see former high coastal reefs in the distance.

[raymoh]

A hypothetical view of the surface of HD 219134 c, the second planet of the HD 219134 system. The system probably has 7 planets, all uninhabitable. The star HD 219134 itself is a sun-like main sequence star at a distance of 21 light years, somewhat smaller, fainter and lower in mass than the sun.
HD 219134 c is a rocky super-Earth with more than 4 times the mass and 1.5 times the diameter of the Earth. Its gravity is twice that of the Earth and its surface temperature is over 500° C. It is so hot that there are puddles of molten metals with a low melting point, such as lead, etc. HD 219134 c revolves very close to its sun, so it has a locked rotation: One side always has day, the other always night.
If the planet has an atmosphere, it probably consists of various volcanic gases under tremendous pressure, more a very stormy dense gas envelope than a layered atmosphere.
It is probably a huge, second Venus, only even more inhospitable. However, it is probably much brighter than on Venus. Due to its proximity, HD 219134 c receives 50-60 times more light and energy from its parent star than the Earth receives from the sun.

[Dune]

Very nice. You must have quite a library of exoplanets already.