Facts About Our Planet

(Photo Credit: Cameron Spencer/Getty Images)
Moonquakes, or "earthquakes" on the moon, do occur, but are less common and less intense than those that shake Earth. (Photo Credit: Cameron Spencer/Getty Images)
(Photo Credit: Image Source/Getty Images)
Because our Earth is not a perfect sphere, its mass is distributed unevenly. Given that, we deal with slightly uneven gravity. (Photo Credit: Image Source/Getty Images)
(Photo Credit: Johannes Simon/Getty Images)
The oceans cover some 70 percent of Earth's surface, but humans have only explored about 5 percent. This means that 95 percent of the planet's vast seas have never been seen! (Photo Credit: Johannes Simon/Getty Images)
(Photo Credit: Daniel Berehulak/Getty Images)
The Earth is approximately 93 million miles (150 million kilometers) from the sun. (Photo Credit: Daniel Berehulak/Getty Images)
(Photo Credit: Daniel Berehulak/Getty Images)
It is possible that there may be more planets like ours. Space scientists have found evidence of Earth-like planets orbiting distant stars, including an alien planet called Kepler 22-b. (Photo Credit: Daniel Berehulak/Getty Images)
(Photo Credit: Andreas Schott/Getty Images)
Scientists believe that the Earth is about 4.54 billion years old. (Photo Credit: Andreas Schott/Getty Images)
(Photo Credit: Adam Pretty/Getty Images)
Our home, Earth, is the third planet from the sun and the only world known to support an atmosphere with free oxygen, oceans of liquid water on the surface and life. (Photo Credit: Adam Pretty/Getty Images)
(Photo Credit: Adam Pretty/Getty Images)
The Earth is not a perfect sphere. As Earth spins, gravity points toward the center of our planet and a centrifugal force pushes outward. (Photo Credit: Adam Pretty/Getty Images)
(Photo Credit: Adam Pretty/Getty Images)
At the equator, the circumference of the Earth is 24,901 miles or 40,075 kilometers. (Photo Credit: Adam Pretty/Getty Images)
(Photo Credit: Adam Pretty/Getty Images)
Did you know that the earth moves around the sun at 67,000 miles (107,826 km) per hour? (Photo Credit: Adam Pretty/Getty Images)
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