Earth - Wikipedia
网页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.
Planet Earth | BBC Earth
网页David Attenborough celebrates the amazing variety of the natural world in this epic documentary series, filmed over four years across 64 different countries.
Facts About Earth - NASA Science
网页Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet.
All About Earth | NASA Space Place – NASA Science for Kids
网页4 天之前 · All About Earth. Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70% of Earth's surface. Explore Earth!
Earth | Definition, Size, Composition, Temperature, Mass, & Facts
网页6 天之前 · 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.
Earth - National Geographic Society
网页2024年4月30日 · Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus, and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun.
In Depth | Earth – NASA Solar System Exploration
网页While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal.
Earth 101 | National Geographic - YouTube
网页2018年11月22日 · Earth is the only planet known to maintain life. Find out the origins of our home planet and some of the key ingredients that help make this blue speck in sp...
Planet Earth facts and information - National Geographic
网页Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life.
Earth - NASA Science
网页We observe our planet’s oceans, land, ice, and atmosphere, and measure how a change in one drives change in others. We develop new ways to observe and study Earth's interconnected systems and we build long-term data records of how our planet evolves.