Some of the disadvantages of space travel include NASA spending money on projects when it is not aware how much commercial investment it can rely on, there are risks to human safety with each mission and certain orbits are very slow. In addition, changes to space travel funding may make it difficult for students to become astronauts.Know More
Although NASA now partners with private firms for space travel funding, there is no guarantee that private companies can invest. While many show an interest, this may mean NASA begins working on projects which are then left without commercial funding. If only a small number of private firms show an investment, establishing contracts becomes inefficient. In addition, space travel is unsafe, with historic tragedies including the loss of Challenger in 1986 and Columbia in 2003. Further losses could be damaging in terms of human life and space travel's reputation, leading to restrictive regulations.
Logistically, some aspects of space travel are challenging. As ships can only carry limited amounts of fuel, they rely on planetary orbits and gravitational thrusts to complete missions. These transfers also limit the number of launches a ship can make. For example, the Earth-Mars transfer is only available once every 2 years, and the Earth-Jupiter transfer is available once every 13 months. Both are slow.
With the Federal government shifting space program funding to private sources, there are less opportunities for students to become astronauts. Usually they enter the program after a career in the airforce, but less federal funding means reduced chances of this happening.Learn more about Space Travel
The vision statement of the National Aeronautics and Space Administration is: "To reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind." NASA was created by President Dwight D. Eisenhower in 1958 in response to the launch of Sputnik by the Soviet Union. The precursor to NASA was the National Advisory Committee for Aeronautics created in 1946.Full Answer >
A satellite requires a speed of 17,450 miles per hour in order to maintain a low Earth orbit. Satellites in higher orbits travel more slowly; for example, a geostationary satellite only orbits at 6,858 miles per hour.Full Answer >
Mae C. Jemison is the first African-American female astronaut and the first African-American woman to ever go to space, according to Biography. She is also a trained dancer, doctor of medicine and Peace Corps volunteer, but being the first African-American female astronaut is what made her famous.Full Answer >
According to the National Aeronautics and Space Administration, astronauts are sent into space to operate the International Space Station, help develop commercial spaceflight, investigate the possibilities of human exploration of deep space, develop new technologies and conduct research in a wide range of scientific fields. Many aspects of scientific studies of the Earth and the rest of the universe are easier to conduct from space.Full Answer >