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2 days ago · 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 harbour life. It is designated by the symbol ♁.
- Planetary Differentiation
Earth - Differentiation, Formation, Structure: Once hot,...
- The Atmosphere
Earth - Atmosphere, Climate, Ozone: Earth is surrounded by a...
- The Interior
Earth - Core, Mantle, Crust: More than 90 percent of Earth’s...
- Basic Planetary Data
Earth - Planet, Atmosphere, Geology: The mean distance of...
- The Outer Shell
Earth - Core, Crust, Mantle: Earth’s outermost, rigid, rocky...
- Impacts, Planetesimals, Craters
Earth - Impacts, Planetesimals, Craters: During its...
- Accretion, Formation, Core
Earth - Accretion, Formation, Core: As the gas making up the...
- Structure, Composition, Development
Earth - Structure, Composition, Development: The origin of...
- Planetary Differentiation
- Earth Has Liquid Water on Its Surface
- Earth Is The only Planet with Continents
- Earth Is The only Planet with Just One Moon
- Earth’s Atmosphere Is Very Different from The Other Planets’
- Earth’s Temperature Is Stable
Earth is the only planet in the Solar system that is located in the habitable zone. The habitable zone (also called the goldilocks zone) is the area around a star where a planet could support liquid water. The distance varies from star to star and depends on its size and type. The Sun’s habitable zone is somewhere between 0.9 and 1.2 Astronomical U...
Continents are large, continuous masses of land that sit on top of plate tectonics and “float” on the planet’s mantle. As plate tectonics move and geological activity happen in the form of volcanoes, for example, contents drift and re-adjust. That’s how we went from a single one to the seven that we know today. But Earth is the only planet in the S...
The following table lists the number of moons (satellites) each planet in the Solar system has. As you can see, planets in the Solar system have either zero satellites or more than one, with Earth being the only exception. This is because of a combination of factors. First, the planets that are closer to their stars can’t capture moons because the ...
The atmosphere is an outer layer of gas that planets have that is located between the planet and space. On Earth and other rocky planets, the atmosphere sits on top of the surface and it is what contains the air we breathe. One of the characteristics that make Earth so unique when compared to the other planets is the composition of its atmosphere. ...
Planets change significantly throughout their lifespan. There was a time when Earth’s surface was as hot as 3,680°F (2026°C) when the Moon was being formed out of an impact with another object, possibly a planet. But while other planets have seen extreme changes in their temperatures, Earth’s has remained more or less stable for most of its lifespa...
- Namesake. The name Earth is at least 1,000 years old. All of the planets, except for Earth, were named after Greek and Roman gods and goddesses. However, the name Earth is a Germanic word, which simply means “the ground.”
- Potential for Life. Earth has a very hospitable temperature and mix of chemicals that have made life abundant here. Most notably, Earth is unique in that most of our planet is covered in liquid water, since the temperature allows liquid water to exist for extended periods of time.
- Size and Distance. With an equatorial diameter of 7926 miles (12,760 kilometers), Earth is the biggest of the terrestrial planets and the fifth largest planet in our solar system.
- Orbit and Rotation. As Earth orbits the Sun, it completes one rotation every 23.9 hours. It takes 365.25 days to complete one trip around the Sun. That extra quarter of a day presents a challenge to our calendar system, which counts one year as 365 days.
Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust.
Oct 11, 2024 · Earth is a terrestrial planet. It is small and rocky. Earth's atmosphere is the right thickness to keep the planet warm so living things like us can be there. It’s the only planet in our solar system we know of that supports life. It is mostly nitrogen, and it has plenty of oxygen for us to breathe.
Apr 12, 2023 · Earth is the only planet in the universe known to possess life. The planet boasts several million described species, living in habitats ranging from the bottom of the deepest ocean to a few miles...
Earth is composed of four main layers, starting with an inner core at the planet's center, enveloped by the outer core, mantle, and crust. The inner core is a solid sphere made of iron and nickel metals about 759 miles (1,221 kilometers) in radius.
