TRAPPIST 1 - a system of an ultra-small red dwarf (just 0.08 Solar masses) with a 7 Earth-sized exoplanets, 3 of which are in the habitable zone, has been discovered recently. (Well, first planets in this system was discovered in 2015, but today was presented 4 new planets).
Official press-release: https://www.eso.org/public/usa/news/eso1706/
You may recognize the software used to make some graphics and animations for it:)
To add this system to SE, download this file and put it into addons/
folder. Surface classes are given to planets based on their bulk density: b, f - oceania, d, e - terra, c, g, h - desert
according to the new article
, masses of outer planets are much less, so they all must be composed of water and/or ice: b, с - desert, d - terra, e, f - oceania (partially frozen), g, h - ice world.
Star luminosity is increased 2 times to make temperatures on planets more high (because in SE temperature calculation on planets of cool stars is somewhat inaccurate).The system map in the new planets Chart (coming in the 0.981). Maybe I should force 'correct' planet orientation in relation to the sun? Tidally locked planets looks weird without it.
4k view from the planet b on a planets c, d, h and e. Planets there does not needs moons, neighbouring planets sometimes became as large in the sky as the Moon in Earth's sky (planet с on this image is 1.2°, or 2.5 times larger than the full Moon).
4k view from the planet e on a parent star and planets b, c, d and f.