The Earth's revolution occurs in two different ways. The Earth revolves around the sun, and it also revolves, or rotates, on its own axis.Continue Reading
The Earth revolves around the sun at a speed of about 67,100 miles per hour. One whole orbit or revolution around the sun takes approximately 365.25 days, which comes out to a year. The extra 0.25 day is accounted in the extra day on leap years every 4 years.
The Earth's axis is tilted slightly, meaning part of the planet is closer to the sun and part of it is farther away at any given time. The actual distance to the sun also changes throughout the year, from a high of 94,509,130 miles around July 4th to a low of 91,402,505 miles around January 3rd. Because the Earth tilts towards the Southern Hemisphere in January , it means that the Southern Hemisphere gets slightly more solar energy than the Northern Hemisphere over the whole year.
The Earth's rotation around the sun and its tilt also produce the seasonal variations in the weather. As the Northern Hemisphere tilts towards the sun, it experiences the warmer temperatures of summer. At the same time, the Southern Hemisphere is tilted away from the sun and experiences winter.Learn more about Earth Science
The Earth, like the other planets in the solar system, rotates due to the manner in which it was formed. Earth inherited its rotation from the spinning movement of the accretion disk, or formation of material moving around a large object, from which the solar system was formed.Full Answer >
While no one knows for certain how the Earth formed, scientists theorize that it formed over 4 million years ago after the sun went through its initial formation, gravity began to draw heavy particles together into a planet and solar winds blew away lighter gases. These heavy particles became the core of the planet. As the mass continued to grow, heavier particles sank to the center, according to Space.com.Full Answer >
Scientists agree that the Earth formed about 4.6 billion years ago out of accreted matter from the solar nebula. All planets in the solar system formed the same way. Once the proto-Earth was formed, many changes occurred over vast timescales to produce the Earth of the 21st century.Full Answer >
One interesting fact about Earth is its status as the fifth planet in terms of size but the densest of all. It also ranks as the largest of the terrestrial planets in the solar system and the only one on which water exists in liquid form on its surface.Full Answer >