“There is no gravity in space”

The idea that gravity ceases to exist once you leave Earth's atmosphere is a widespread misconception, largely fueled by images and videos of astronauts floating effortlessly in space. This visual representation of weightlessness often leads people to believe that beyond a certain point, Earth's gravitational pull simply disappears. However, the truth is far more complex and fascinating, revealing the pervasive nature of gravity throughout the cosmos.

What astronauts experience in orbit, like those on the International Space Station (ISS), is not an absence of gravity, but rather a continuous state of freefall, often referred to as microgravity. The ISS and everything within it, including the astronauts, are constantly falling around Earth, orbiting at tremendous speeds. This perpetual fall creates the sensation of weightlessness, similar to the brief feeling you get at the top of a roller coaster drop. In reality, at the altitude where the ISS orbits, Earth's gravity is still quite strong, approximately 90% of what we experience at the planet's surface.

The persistence of this myth stems from confusing the sensation of being weightless with the actual presence of gravitational force. Gravity is a fundamental force that extends infinitely, though its strength diminishes with distance from a mass. Every object with mass in the universe exerts a gravitational pull, from tiny asteroids to colossal galaxies. Therefore, gravity is not absent in space; it is the invisible architect of the universe, holding planets in orbit around stars, stars in galaxies, and galaxies within clusters.