path of one object around a more massive object. (a) What is this in cubic kilometers (km3)? If we consider the earth to be a sphere, we can use the following equation to determine its volume. The sun has extremely important influences on our planet: It drives weather, ocean currents, seasons, and climate, and makes plant life possible through photosynthesis. E=14πε0qr2   =keqr2. Short-period comets take fewer than 200 years to orbit the sun. All rights reserved. This shape, caused by the flattening at the poles, is called an oblate spheroid. National Geographic Headquarters Ui=-Gm1m2ri Join our community of educators and receive the latest information on National Geographic's resources for you and your students. Earth's mass is 6.6 sextillion tons (5.9722 x 10 24 kilograms). And if you have a news tip, correction or comment, let us know at: According to other astronomers, only about 960,000 Earths could fit inside the sun. Find answers to questions asked by student like you. National Geographic: Planetary Size and Distance Comparison, National Geographic Video: Solar System 101, National Geographic Science: Solar System. The total surface area of Earth is about 197 million square miles (510 million square km). Jupiter, which is 318 more massive than Earth, is less dense because it is made of gases, such as hydrogen. one of the four enormous outermost planets in the solar system (Jupiter, Saturn, Neptune, Uranus), composed mostly of gases instead of rock. Long-period comets take more than 200 years to orbit the sun, and are much more unpredictable. Using those measurements, the equatorial circumference of Earth is about 24,901 miles (40,075 km). It was born about 4.6 billion years ago, and has about 5 billion years left before it dies. About 71 percent is covered by water and 29 percent by land. Physician Daniel Chertow takes us through the clinic and shares his thoughts on what it's like to be volunteering in the midst of an epidemic like no other. What is the rms electric ... A: The power of the bulb P=2.6 W The mean radius of the earth is approximately 6.4 million meters (exact = 6.37 x 10 6 m). This is 6380 km. (c) What is it in cubic centimeters (cm3). Receive mail from us on behalf of our trusted partners or sponsors? Most planets have natural satellites, called moons, that orbit them. Earth is the largest of the terrestrial planets of the inner solar system, bigger than Mercury, Venus and Mars. Earth has a volume of 1.08 x 10 12 cubic kilometers. Earth's density is 5.513 grams per cubic centimeter, according to NASA. 1145 17th Street NW It reaches down about 36,200 feet (11,034 meters) below sea level. "main sequence" star with huge surface area, low surface temperature, and reddish color. Ganymede, the solar system’s biggest moon (it orbits Jupiter), is larger than Mercury, the solar system’s smallest planet. The mass and volume of the sun are so huge that some astronomers describe the solar system as “the sun plus some debris.” What are some examples of the “debris” of the solar system? The sun is an ordinary star, one of about 100 billion in our galaxy, the Milky Way. Related: What's the Speed of Earth Around the Sun? lifted at a constant veloci... A: The free body diagram of the I–beam is For information on user permissions, please read our Terms of Service. First, the sun will get bigger—so big it will be called a “red giant.” The red giant sun will expand as far as the orbits of Mercury and Venus—and might even gobble up Earth as well. The planet's rotation causes it to bulge at the equator. large, spherical celestial body that regularly rotates around a star. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource. measure of the amount of matter in a physical object. Maximum depths from ETOPO1 are not expected to exactly match known measured maximum depths as ETOPO1 … Mount Everest is the highest place on Earth above sea level, at 29,028 feet (8,848 meters), but it is not the highest point on Earth — that is, the place most distant from the center of the Earth.