What Is Gravity? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · The answer is gravity: an invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. An animation of …
Gravity | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · 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 …
What Is a Gravitational Wave? - NASA Space Place
Sep 25, 2025 · Before this, just about everything we knew about the universe came from studying waves of light. Now we have a new way to learn about the universe—by studying waves of …
What Is an Orbit? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · This statement is called Newton's first law of motion. Without gravity, an Earth-orbiting satellite would go off into space along a straight line. With gravity, it is pulled back …
All About the Moon | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · We know that the Moon has almost no atmosphere and only about one-sixth of Earth’s gravity. We even know that there is quite a bit of frozen water tucked away in craters …
Why Are Planets Round? | NASA Space Place – NASA Science for …
Jun 27, 2019 · Why Are Planets Round? The Short Answer: A planet is round because of gravity. A planet's gravity pulls equally from all sides. Gravity pulls from the center to the edges like the …
Is Time Travel Possible? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · Here's how: Einstein's theory also says that gravity curves space and time, causing the passage of time to slow down. High up where the satellites orbit, Earth's gravity is …
What Is a Black Hole? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · What Is a Black Hole? The Short Answer: A black hole is an area of such immense gravity that nothing -- not even light -- can escape from it.
How Did the Solar System Form? - NASA Space Place
Aug 29, 2022 · Bits of this material clumped together because of gravity. Big objects collided with bigger objects, forming still bigger objects. Finally some of these objects became big enough …
What Is a Satellite? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · A satellite orbits Earth when its speed is balanced by the pull of Earth's gravity. Without this balance, the satellite would fly in a straight line off into space or fall back to Earth.