# Why do astronauts in space not fall directly down to the ground?

## Why do astronauts in space not fall directly down to the ground?

Astronauts float around in space because there is no gravity in space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Well, astronauts are so far from the Earth that gravity is so small. This is why NASA calls it microgravity.

### How do orbiting spaceships avoid free falling to Earth?

Earth’s gravity pulls objects downward toward the surface. Gravity pulls on the space station, too. An orbiting spacecraft moves at the right speed so the curve of its fall matches the curve of Earth. Because of this, the spacecraft keeps falling toward the ground but never hits it.

Can you turn off gravity in a spaceship?

In science fiction, artificial gravity (or cancellation of gravity) or “paragravity” is sometimes present in spacecraft that are neither rotating nor accelerating. At present, there is no confirmed technique that can simulate gravity other than actual mass or acceleration.

How do spaceships fly without gravity?

Rockets and engines in space behave according to Isaac Newton’s third law of motion: Every action produces an equal and opposite reaction. When a rocket shoots fuel out one end, this propels the rocket forward — no air is required. NASA says this principle is easy to observe on Earth.

## What altitude does gravity stop?

Near the surface of the Earth (sea level), gravity decreases with height such that linear extrapolation would give zero gravity at a height of one half of the Earth’s radius – (9.8 m·s−2 per 3,200 km.)

### Will the ISS fall to earth?

The ISS doesn’t fall to Earth because it is moving forward at exactly the right speed that when combined with the rate it is falling, due to gravity, produces a curved path that matches the curvature of the Earth.

Do they have gravity in spaceships?

Yes, there is a gravitational force acting on everything—but there is also that air drag force that will make the spacecraft slow down as it moves down. If the human is going to stay inside the spacecraft, there must also be an extra force on that human (from the floor).

How do spaceships make oxygen?

The short answer is the astronauts and cosmonauts (that means a Russian astronaut) bring oxygen from Earth, and they make oxygen by running electricity through water. This is called electrolysis. The air and water on the Space Station all originally came from Earth.

## How does rocket move in space?

In a similar manner, a rocket moves in space because the gases are given momentum as they are expelled by the rocket engine. This momentum change of the gases gives the rocket the “push” to go forward. We call this push, the thrust of the rocket, i.e. the force exerted on the rocket.

### How do spaceships slow down in space?

To slow down, you fire a forward-facing thruster. To alter your course, you fire a thruster in a sideward direction. To rotate your spacecraft, you fire a pair of sideward-pointed thrusters located near opposite sides of the spacecraft. To stop rotating, you fire thrusters aimed in the opposite direction.

Why does a spaceship not fly in space?

So, spaceships doesn’t fly in space. It “falls” in space. It falls to nowhere because in outer space there is no up or down, it’s just all relative. Thus, the spaceship retains it’s relatively zero speed. Spaceships move by pushing itself around to go to somewhere with it’s engines.

How does a space ship fly around the Earth?

Space ships doesn’t fly. After reaching the earth’s gravity orbital velocity (the speeds an object is required to reach and not exceed to keep revolving around the earth like out moon does) and above the earth’s athmosphere, It becomes a planet of itself.

## What makes a spacecraft not fall back to Earth?

In short, it’s the altitude range where the gravitational pull of the planet is high enough that the object doesn’t fly off into space, but low enough that a spacecraft doesn’t instantly fall back to Earth in the absence of consistent boosts. Above this range, the gravitational pull of our planet becomes increasingly small.

### Why are there no up and down in space?

There is an up and down in space. Down is simply the direction gravity is pulling you, and up is just the opposite direction. Since there is gravit… Answers provided by Dr. Christopher S. Baird Recent Questions Biology Chemistry Earth Science Health Physics Society Space Why is there no up and down in space?