458
The number will be high as we have to count the cosmonauts as well.The shuttle and space station had many at a time could be 400 in all.
Comets have been in space since the start of time. In the 1800's there were many people who knew comets where a space phenomena, there were people who thought it was a message from the gods. What people thought of the comets depended on their cultural beliefs.
7
Six starting in 1969
As of now, there are currently seven people in space. They are aboard the International Space Station conducting scientific research and maintenance tasks.
12 and a half
a lot. There are astronauts in space all time and they exchange routes as they are not allowed to be in space for more than six months
Everyone who isn't underwater or in outer space
That depends on how much supplies were on-board. If there was enough, the whole population could go. And if there was enough space.
Space travel to the Moon is not available at this time. With the cuts in the US Space program and the ending of the space shuttle program, it will be many years before there is a way for people to go on holiday to the Moon.
There are (so far) three dimensions of space, and one dimension of time.
STS-125: Final Shuttle Mission to Hubble Space TelescopeMichael J. Massimino, Michael T. Good, both mission specialists; Gregory C. Johnson, pilot; Scott D. Altman, commander; K. Megan McArthur, John M. Grunsfeld and Andrew J. Feustel