On Earth, we have to contend with our own gravity well when we launch rockets ... a boundary in space marking the point of no return. Nothing inside the event horizon can escape from a black ...

Isaac Newton - isn't he the guy who discovered gravity? Great! So, what's gravity? Aaaah, gravity is the force that makes objects fall towards the ground. And, without gravity, we'd all float!

The moon, is only a quarter the size of the Earth. Gravity holds it in an ongoing embrace, its orbit taking nearly 27 and a half days to complete. The planet Earth is about 4.5 billion years old.

After more than eight months aboard the International Space Station (ISS), astronaut Sunita Williams is bracing for one of her toughest challenges yet—readjusting to Earth’s gravity.

Feb. 19, 2025 — Arctic glaciers are leaking significant amounts of methane, a potent greenhouse gas. Glacial melt rivers and groundwater springs are transporting large volumes of methane from ...

This story appears in the August 2018 issue of National Geographic magazine. Indonesia has 127 active volcanoes. Only the U.S. (168) and Russia (144) have more. Essential packing list: We landed ...

Atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

Feb. 3, 2025 — A recent study has uncovered compelling evidence suggesting that the climate effects of new particles in urban areas have been significantly ...

Our planet, Earth, is structurally composed of a series of concentric internal spherical layers that are divided into: crust, upper mantle, mantle, outer core and inner core. Everything we know ...

Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds. Known as large low-seismic-velocity provinces (LLSVPs), these blobs are both hotter and ...

Ukraine boasts vast reserves of ilmenite — a key element used to produce titanium — in the heavy mineral sands that stretch ...