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 …

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 …

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 …

Sep 25, 2025 · Glossary explore How Do We Launch Things Into Space? You need a rocket with enough fuel to escape Earth’s gravity! What Is a Planet? explore Ions in action do How Do We …

Sep 25, 2025 · explore What Is Gravity? Gravity is the force by which a planet or other body draws objects toward its center. explore What Is a Satellite? A satellite is anything that orbits a …

Sep 25, 2025 · Answer your questions: What is the Big Bang? What is a black hole? What is a planet? What is gravity?

Sep 25, 2025 · Satellites that orbit close to Earth feel a stronger tug of Earth’s gravity. To stay in orbit, they must travel faster than a satellite orbiting farther away.

Sep 25, 2025 · When you stand on a scale, what it’s actually doing is measuring how hard Earth’s gravity is pulling on you. If you were to step onto a scale on another planet, it would say …

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. Click here to download this …

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 near the Moon's …