A fast YouTube lookup reveals a myriad of floating astronaut video clips. They can spin in the air, juggle bubbles of drinking water, and their hair appears to be like absurd. It absolutely appears that there’s no gravity in space—but appearances are deceiving.
Astronauts in orbit are more properly in no cost slide. They are frequently slipping in direction of Earth—which indicates Earth is holding pretty the gravitational keep on them. They just come about to be also transferring rapid sufficient that they preserve lacking the ground.
The Root of Gravity: Does the latest research convey us any closer to comprehending it?
Gravity does weaken with distance. But for significant objects like stars and planets, their gravitational reach is massive. Without the need of Earth’s gravity, the Moon (which orbits roughly a thousand periods farther absent than the Intercontinental Space Station) would fly off into the depths of space. In its place, Earth retains it on a gravitational tether. Similarly, the Sunshine retains a grasp about not just Earth and Jupiter and Pluto, but even the Oort Cloud of comets, which extends a complete light-weight-year absent.
The Sunshine is topic to the gravity of the significant black hole at the middle of the Milky Way. And the Milky Way itself dances to the gravitational drumbeat of other close by galaxies.
In small, it’s really hard to uncover objects in space that are not topic to something else’s gravitational tug.