Obviously coloured gases due to absorption in the visible range that are gaseous under hospitable conditions include chlorine. But chlorine is itself...
You do not need to get within 2 m distance of a black hole to be spaghettified. In fact, you would be spaghettified thousands of km away from a black...
In Kepler 3rd, the distance is the distance between the centres of the bodies (the centre of mass lies somewhere on the line) and the mass is the sum...
My points:
1) "magnitude plausible"? Tidal heating of Io only happens because Io happens to be strongly perturbed out of a circular orbit. If a moon...