2025年1月13日 · The ISS orbits at a height of about 402 kilometers, or 250 miles (we'll explain why we describe it as "about" shortly) and is traveling at 7.6 kilometres (4.7 miles) per second, …

Why do astronauts aboard the International Space Station seem to float? The ISS is only about 200 miles above Earth—where, according to Newton, gravity is almost as strong as it is here on...

2017年5月3日 · The answer is that astronauts float in space because they are free-falling toward the Earth (see the “orbital speed” title below). They experience the same thing experienced by a roller coaster rider on an amusement park ride.

Why some people say yes: Earth's gravitational field extends into space, and therefore pulls the ISS and astronauts inside it. In fact, the force of gravity does act on objects in the ISS although they appear to float freely, as they would in deep space in the complete absence of gravity.

2024年6月25日 · The astronauts float inside the space station because they are in a state of free fall, where gravity causes all objects to fall at the same rate. In a vacuum, the mass of the object does not matter.

Both the ISS and its occupants are falling due to the Earth's gravitational field, but their tangential momentum means that they keep missing and so orbit the Earth. Since they are falling at the same rate, the occupants appear to float inside. Probably safer to talk about weightless than effective gravity.

2024年7月25日 · The ISS and the astronauts are in free fall around the Earth. That’s why the astronauts float in the International Space Station. Gravity, Weightlessness, Zero Gravity, Microgravity! Before answering the question of why astronauts float in the International Space Station (ISS), we need to clarify some physics terms simply.

2013年5月6日 · Answer: The International Space Station (ISS), like all other objects in orbit, experiences a slight amount of air drag, even at an altitude of hundreds of kilometers. The air gets pretty thin up there, but it’s still enough to cause friction and gradually reduce the …

2025年2月27日 · One of the most fascinating aspects of the ISS is the way astronauts and objects move within its interior, seemingly defying the laws of gravity. But why do astronauts and their clipboards and pens float around in the ISS instead of falling? Let's dive into the physics behind this phenomenon. A. The ISS is so far from the Earth, gravity is ...

2025年2月26日 · We kicked off with some hypotheses about why astronauts float — either “there’s no gravity in space” or “it’s way weaker up there.” Here’s what we’ve uncovered and learnt on the way: