[The_Reader_David]

If a muslim astronaut is out in deep space, which way is east???

That would be an interesting question if Muslims faced East when praying. Traditional Christians (Orthodox, Copts, Armenians, Assyrians, Latins, traditionalist Anglicans) face east when praying, Muslims face Mecca, and Jews face Jerusalem.

[downtownconservative]

I guess Mecca would be toward Earth, which would be a three dimensional direction.