1. Earth has only one natural satellite which is called the
‘Moon’. Luna (Moon) orbits at a distance of 384,000 km with a radius of 1738 km
and a mass of 7.32 e22 kg. There are thousands of small artificial satellites
which have been placed in orbit around the Earth. Because of its size and
composition it is also called a terrestrial planet along with Mercury, Venus,
earth and Venus.
2. The proximity prevents us from seeing Earth as a whole. If we wish to view the entire planet then we must travel to space and being at the vantage point of space we can view the planet globally as we do view others.
3. Earth is the only planet to harbor life as it has an atmosphere that sustains life. Its atmosphere is 76% Nitrogen, 21% Oxygen with traces of Argon, Carbon dioxide and water. The atmosphere affects Earth’s long term climate and short term local weather as well as shield us from nearly all harmful radiations coming from the Sun. It also protects from meteors as well as they mostly burn up before they strike the surface of the Earth.
4. Earth has four distinct seasons. This is an outcome of Earth’s axis of rotation being tilted more than 23 degrees. Seasons changes as the tilt of the Earth’s axis changes during its revolution around the Sun.
2. The proximity prevents us from seeing Earth as a whole. If we wish to view the entire planet then we must travel to space and being at the vantage point of space we can view the planet globally as we do view others.
3. Earth is the only planet to harbor life as it has an atmosphere that sustains life. Its atmosphere is 76% Nitrogen, 21% Oxygen with traces of Argon, Carbon dioxide and water. The atmosphere affects Earth’s long term climate and short term local weather as well as shield us from nearly all harmful radiations coming from the Sun. It also protects from meteors as well as they mostly burn up before they strike the surface of the Earth.
4. Earth has four distinct seasons. This is an outcome of Earth’s axis of rotation being tilted more than 23 degrees. Seasons changes as the tilt of the Earth’s axis changes during its revolution around the Sun.