zero gravity
If you mean aliens, then there are for sure some aliens in there. If you mean humans then there are some spacemen in space stations on Earth orbit who keep the space stations working.
Toilet Problems.
ya mom
Humans are able to moonwalk on the moon. Usually the humans have some kind of job to do.
the person will sufocate and die
space shuttles
Animals were sent into space before humans to test the life support systems and to generate some data regarding the hazards and potential medical concerns for humans.
You can't stand on something because it is gas
Humans have build a wide range of spacecraft in their voyage of space discovery, some manned and some not. A few of these include Vostok, the first manned spacecraft and the Colombia Orbiter which is considered a space plane.
Some problems that can happen in space include equipment failures, radiation exposure, isolation and psychological challenges for astronauts, debris collisions, and the potential for long-term health effects from extended space travel. Additionally, communication delays and navigation difficulties can also pose challenges in space missions.
none with humans although some probes have
There are thousands of bacteria that effect humans. Some cause problems or illness and others actually help the body function.