Human Space Travel is so expensive because it takes alot of money to build the spaceship and then you would have to test it which might cause it to crash.
That special gear that has been developed for human space travel was the space suits. The space suits kept human alive in the harsh environment of space, temperature extremes and vacuum.
To see if it was safe for a human to travel into safe. If the monkey made it, a human might survive space travel. If the ape died, then it was not safe for a human to go into space. The chimp lived, so human beings were sent into outer space.
Some disadvantages of gravitational energy include limitations on location for installation, as it requires specific geographical conditions like high elevation differences. It also has lower efficiency compared to other renewable energy sources like solar or wind power, as the energy output from gravitational systems might be affected by factors such as friction and resistance. Additionally, large-scale implementation of gravitational energy systems could have environmental impacts on the surrounding ecosystem and wildlife habitats.
Russia.
By rockets
rocket
Yuri Gagarin
It a spacecraft
humans need to travel to outer space to reduce the chances of human species being wiped out by a single disaster such as meteor
Space travel can have various effects on the human body, such as muscle atrophy, bone density loss, cardiovascular changes, and vision impairment. Exposure to radiation and the psychological effects of isolation and confinement can also impact astronauts. However, ongoing research is focused on understanding these effects and developing countermeasures to mitigate them for long-duration space missions.
Yuri Gagarin was the first human to travel in outer space on April 12th, 1961
It was the Russian, Yuri Gagarin.