gravity

The mission is full of landmarks: it will be the first time a South Korean woman has headed into orbit, and it will also be the first time that "kimchi"—that spicy, garlicky cabbage dish that epitomizes South Korea—will be served at the zero-gravity dinner table.

It's gravity that makes satellites move around the Earth.

If you can use gravity to your advantage, do so.

Gravity brings everything down to Earth.