Thanks for your answers. After checking the HIPPARCOS.csv file, I can see that we basically have the distance, apparent magnitude and spectral class of the star. This allows to retrieve the luminosity and temperature of the star (with some assumptions of course, but that are not shocking at all for ...

Hi all, I wonder how is implemented star classification in SpaceEngine. I just found today a weird case today: HD115678 is a M-type star (which is right, in accordance with Simbad ). But also, it is a high-luminosity star (absolute magnitude of ~0, even less according to Gaia DR2). It is therefore a...