Some negative consequences of space exploration include the emission of ozone-depleting substances and the presence of man-made debris in the earth's orbit. In addition, astronauts may experience some negative physical effects of space exploration.Know More
Space exploration can have a negative impact on the environment. When rockets launch into space, their engines let out gases and debris such as aluminum oxide and soot. These substances can damage the ozone layer and contribute to global warming.
However, space travel is not nearly as commonplace as car or airplane travel, which also release harmful substances into the atmosphere. Therefore, space exploration does significantly contribute to global warming. As space exploration becomes more commonplace, scientists must tackle environmental issues associated with rocket launches.
In addition to gases and particles, man-made objects often get left behind in the earth's orbit. There are over 500,000 pieces of orbital debris in orbit, according to NASA. Orbital debris includes broken spacecraft, pieces of launch vehicles, pieces of spacecraft and satellites that break off during explosions, pieces of paint and used batteries. Orbital debris does not significantly affect the earth itself, but it does pose a small risk to astronauts working in space. The U.S. and other countries such as Russia and China have guidelines in place to reduce orbital debris.
Space exploration can have negative health consequences to astronauts. Zero gravity conditions can cause bones to release less calcium, causing them to become brittle. Radiation can also impact bones. Floating also causes back and lower body muscles to become weaker, as they are not used in the same way.
In addition, space exploration can cause changes to the body's balance system and inner clock. Astronauts must undergo a period of adjustment after returning to Earth.Learn more about Space Travel
According to Universe Today, space begins where the Earth's atmosphere stops. However, the Earth's atmosphere does not stop abruptly. The Earth's atmosphere gradually grows thinner with increasing distance from the surface of the planet.Full Answer >
The first U.S. space shuttle to orbit the Earth was Columbia. It launched on April 12, 1981, from Kennedy Space Center. Crewed by astronauts John W. Young and Robert L. Crippen, it remained in orbit two days before landing safely, airplane-like, at Edwards Air Force Base in California.Full Answer >
In 2009, scientists at the University of Calgary used measurements of atmospheric wind and the flow of charged particles to determine that space begins at 73 miles above the Earth's surface. However, there are competing, and sometimes conflicting, assessments of Earth's boundaries.Full Answer >
According to data collected by the University of Calgary, space begins and the Earth's atmosphere ends at 73 miles above the Earth's surface. However, other countries and agencies have a differing opinion on where space begins.Full Answer >