Apr 13, 2026 · Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun. What else does gravity do? Why do …

Mar 13, 2026 · 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 …

Apr 13, 2026 · Jupiter's strong gravity constantly tugs on Europa. The pull is strongest on the side that always faces Jupiter. When Europa is close to Jupiter in its orbit, Jupiter’s gravity pulls even harder …

Apr 13, 2026 · A gravitational wave is an invisible (yet incredibly fast) ripple in space. Gravitational waves travel at the speed of light (186,000 miles per second). These waves squeeze and stretch …

Apr 13, 2026 · 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 …

Apr 13, 2026 · As seen from the side, a large planet and a star orbit their shared center of mass, or barycenter. The slightly off-center barycenter is what makes the star appear to wobble back and forth.

Jan 20, 2026 · NASA science games, articles and activities for kids

Apr 13, 2026 · Imagine a circle with a singularity in the middle. The gravity on the inside of the circle is so strong that nothing can escape—it sucks in everything, even light. That's why it's black! This circle …

Apr 13, 2026 · The impact sent chunks of Earth and the impactor into space that were pulled together by gravity, creating the Moon. How do we study the Moon? Even thousands of years ago, humans drew …

Apr 13, 2026 · What Is Dark Matter? The Short Answer: Dark matter is stuff in space that has gravity, but it is invisible and isn’t like anything else we know about. Dark matter makes up about 27% of the …