- Earth | Definition, Size, Composition, Temperature, Mass . . .
Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbor life Learn more about development and composition of Earth in this article
- Earth - Wikipedia
Earth is rounded into an ellipsoid with a circumference of about 40,000 kilometres (25,000 miles) It is the densest planet in the Solar System Of the four rocky planets, it is the largest and most massive Earth is about eight light-minutes (1 AU) away from the Sun and orbits it, taking a year (about 365 25 days) to complete one revolution
- Facts About Earth - Science@NASA
When Earth was a young planet, a large chunk of rock smashed into it, displacing a portion of Earth's interior The resulting chunks clumped together and formed our Moon With a radius of 1,080 miles (1,738 kilometers), the Moon is the fifth largest moon in our solar system (after Ganymede, Titan, Callisto, and Io)
- Planet Earth — Everything you need to know | Space
Earth's core is about 4,400 miles (7,100 km) wide, slightly larger than half the Earth's diameter and about the same size as Mars The outermost 1,400 miles (2,250 km) of the core are liquid
- Structure of the Earth! - National Geographic Kids
The Earth’s inner core is a huge metal ball, 2,500km wide Made mainly of iron, the temperature of the ball is 5,000°C to 6,000°C – that’s up to 6,000 times hotter than our atmosphere and scorching enough to make metal melt!
- The Earth - Imagine the Universe!
Both of these values are very close to the accepted modern values for the Earth's circumference and radius, 40,070 km and 6378 km respectively, which have since been measured by orbiting spacecraft The diameter of a circle is twice the radius, giving us a diameter for Earth of 12,756 km Note: The Earth is almost, but not quite, a perfect sphere
- Structure and composition of the Earth - Australian Museum
atmosphere: measured from the surface of the Earth upwards to 150 km (anything above this is called space) solid Earth: measured from the surface of the Earth downwards to the core; The atmosphere The atmosphere makes up less than one millionth of the total mass of the Earth, and contains mainly nitrogen and oxygen (99% of the total) as gases
- Earth - Simple English Wikipedia, the free encyclopedia
Earth also turns around in space, so that different parts face the Sun at different times Earth goes around the Sun once (one year) for every 365 1 ⁄ 4 times it turns around (one day) Earth is the only planet in the Solar System that has a large amount of liquid water on its surface
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