Celestia Forums

I think.... Giant stars(I-III) are dying stars. O, B and A type stars are too massive to live long enough time. M type stars are extremely dim and most of them exhibit fatal flare. In the result, F, G and K main sequence(V) and subgiants(IV) may host stable system. Of course companion stars makes pl...

An idea occured to me. Long ago, there was intelligent life. They crossed the star ocean and prospered. They needed a lot of Fluorine industrially, so they made some stars into a Fluorine factory. Time had passed. Fluorine factory star had died. But fluorine remained. Their fragment got together and...

More amount of rare elements will exist in the far future,
but even then, they are still rare,
because more and more amount of other element
easier to generate will be made at the same time.....I think.

Massive star is short life.
During forming planets, or on forming planets, the star will die.
So it is difficult for lives to develop...( ' (Y)')

I think any place is center of universe!

I think such rings are difficult to exist. If two inclined moons are destroied at the same time, they can become two inclined fragments belts. But they should have more spread shape.I think fragments will later get together above the equator of the planet and become sharper ring but I have no confid...