Please help me with this riddle...its blowing my mind?

Question

i was told...

its a planet

you can go in but not out

there are floors but not cielings

there is gas but no gasoline

there is glass but no windows

there is cars but no engines

the dude said he wouldnt tell me unless i got it right

Answer 1

Saturn

Answer 2

It is a planet... he says ... its a planet...

In but not out can possibly refer to some sort of gravitational fields,

floors but no ceilings means nothing other than that there is ground but no buildings...

gasses on planets exist already with no gasoline (cause its processed)

I am lost on the last two...

Glass but no windows... I mean all glass is is superheated sand... so ... that could be on a planet somewhere.

I don't know where there is a car with no engine on a planet. that is the only one that i couldn't even try and fight...

I mean is a car with no engine just metal?

I can't help ya on that one dude... let me know if you get it.