Earth formed around 4.6 billion years ago by collisions in a giant disc-shaped cloud of material. Gravity caused this gas and dust to slowly accrete into clumps ,which became the asteroids and small early planets called ... More »

www.reference.com Science Astronomy Planets

An earth tremor is another term for an earthquake, although it is most commonly used to describe earthquakes of low intensity. Earthquakes are measured with tools called seismographs, and their intensity is rated on a lo... More »

Scientists estimate that the Earth was created approximately 4.54 billion years ago, which is less than 100 million years after the formation of the solar system. It is thought that the planet was created as a result of ... More »

www.reference.com Science Astronomy Planets

Earth formed around 4.54 billion years ago and is the third planet from the Sun. It is the fifth largest planet in the solar system and the largest of the terrestrial planets. It is also the densest of all the planets. More »

The hottest place on Earth is in its molten core, where temperatures reach approximately 10,800 degrees Fahrenheit. The surface temperatures on the planet vary widely, but according to NASA, the average surface temperatu... More »

The distance between Earth and Uranus changes constantly, due to the solar system not being entirely concentric. However, the closest Earth and Uranus get is 1.6 billion miles, which is 2.6 billion kilometers. At furthes... More »

The Earth has a mass of 5.97 times 10^24 kilograms. Because weight is defined as the gravitational force exerted on one body by another, the Earth cannot be heavy. More »