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American Museum of Natural History

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27 Results for "gravity"

Gravity is the force of attraction between all objects in the Universe. Objects with more mass have greater gravitati...

Find out why a ball thrown in the air will return to the ground.

A galaxy is a giant, spinning object made of gas, dust, and stars held together by gravity. Galaxies come in differen...

Mass and weight may seem like the same thing, but in fact these two measurements are very different. Mass is the tota...

Since the 1920s, observations of distant galaxies reveal that our universe was expanding.

Many historians consider English scientist Sir Isaac Newton the first modern physicist. He explained how gravity affe...

A black hole is a collapsed star. When high-mass stars use up all their fuel, their cores collapse inward. The heavie...

Most mass in the universe is not normal matter we can see, like stars, planets, and puppies. In fact, 80% of the mass...

Ninety-three million miles from Earth, a giant ball of hot gas brightens the sky. Nuclear reactions in the Sun's core...

Asteroids are space rocks that have existed since the formation of the planets over 4.6 billion years ago. Scientists...

A star is a huge glowing ball of hot gas. Deep inside its core, hydrogen atoms smash together, forming helium and rel...

Einstein might never have become a worldwide celebrity had it not been for the English astrophysicist Arthur Eddington.

You have to be a really big thinker to imagine the size of the Universe.

Astronomy is a BIG subject. We've brought learning about it down to size with these big ideas.

Albert Einstein made many great contributions to science that include the Special Theory of Relativity and the Genera...

What was the universe like right after the Big Bang? To find out, you'd have to look back in time. That was the job o...

The Big Dipper is a grouping of stars within the constellation Ursa Major, also known as The Great Bear. The best tim...

As a kid growing up in New York City, Rebecca Oppenheimer always wanted to study stars and planets. She never dreamed...

In college, Mordecai-Mark Mac Low decided to take science classes that looked like fun. So he chose astrophysics, whi...

Look at all the things around you -- your computer, your finger, your desk, even the trees outside. They're all made...

Pluto was discovered in 1930 and considered to be the ninth planet in our solar system.

Comets are like "dirty snowballs" that have orbited the Sun since our Solar System formed, billions of year...

Did you ever see a "shooting star"? What you really saw was a meteor burning up in the Earth's atmosphere.

To find north, find Polaris. Earth rotates on its axis, which points directly at Polaris. From Earth, Polaris is the...

The Orion constellation is known for having some of the brightest stars in the night sky. On a clear night, try to fi...

There are many kinds of energy. But only one makes plants grow, drives the weather, and keeps our planet warm enough...

As a kid, Neil Tyson first glimpsed the magic of the Universe in the Hayden Planetarium at the American Museum of Nat...