What Is Gravity? | NASA Space Place – NASA Science for Kids
2024年12月5日 · Earth's gravity is what keeps you on the ground and what makes things fall. An animation of gravity at work. Albert Einstein described gravity as a curve in space that wraps around an object—such as a star or a planet.
How Do We Launch Things Into Space? - NASA Space Place
2024年12月5日 · If you’re trying to get to another planet, you’ll need a fast-moving rocket to overcome Earth’s gravity. To do that, you’d have to speed up to around 25,000 mph. But you’ll also need to figure out the best time to leave Earth to get to that planet.
Gravity | NASA Space Place – NASA Science for Kids
2024年12月5日 · What Is Gravity? Gravity is the force by which a planet or other body draws objects toward its center. explore; What Is a Black Hole? Space Place in a Snap tackles this fascinating question! explore; What Is a Barycenter? And how does it help us find new planets? explore; Why Are Planets Round? And how round are they? explore; How Do We Weigh ...
All About the Moon | NASA Space Place – NASA Science for Kids
All About the Moon | NASA Space Place – NASA Science for Kids
How Do We Weigh Planets? | NASA Space Place – NASA Science …
2024年12月5日 · What does gravity have to do with weight? Earth's gravitational pull is what keeps the Moon in orbit around our planet. Voyager 1 snapped this picture of Earth and the Moon from a distance of 7.25 million miles.
Black Hole Rescue! | NASA Space Place – NASA Science for Kids
2013年12月20日 · Here on Earth, gravity is what makes things fall down, rather than just float away, when you let go of them. Gravity is what you are measuring when you step on a scale to weigh yourself. Your weight is the amount of force that Earth's gravity exerts on you.
What Is a Barycenter? | NASA Space Place – NASA Science for Kids
2024年12月5日 · The sun, Earth, and all of the planets in the solar system orbit around this barycenter. It is the center of mass of every object in the solar system combined. Our solar system’s barycenter constantly changes position.
What Is a Gravitational Wave? - NASA Space Place
2024年12月5日 · When a gravitational wave passes by Earth, it squeezes and stretches space. LIGO can detect this squeezing and stretching. Each LIGO observatory has two “arms” that are each more than 2 miles (4 kilometers) long. A passing gravitational wave causes the length of the arms to change slightly.
Videos | NASA Space Place – NASA Science for Kids
2024年12月5日 · You need a rocket with enough fuel to escape Earth’s gravity! What Is a Nebula? A nebula is a cloud of dust and gas in space. What Is a Solar Eclipse? Learn more about what happens when the moon passes between Earth and the sun! explore; Searching for Other Planets Like Ours. Exoplanets are far away and hard to see. How do we look for them ...
Glossary | NASA Space Place – NASA Science for Kids
2024年12月5日 · It’s a system that uses satellites, ground stations, and receivers to tell you exactly where you are on Earth. Gravity: A force that pulls matter together. Greenhouse gas: Gases in the atmosphere that trap heat from the sun. Some greenhouse gases are carbon dioxide, methane, water vapor, and nitrous oxide.