How does the space elevator work?

A space elevator is a proposed transportation system connecting the Earth’s surface to space. The elevator would allow vehicles to travel to orbit or space without the use of rockets. Gravity would pull downward on the cable, while centrifugal force from the orbiting counterweight would pull upward.

Why does the space elevator need a counterweight?

A counterweight at the upper end keeps the center of mass well above geostationary orbit level. This produces enough upward centrifugal force from Earth’s rotation to fully counter the downward gravity, keeping the cable upright and taut. Climbers carry cargo up and down the cable.

Where do space elevators go?

To reduce risks to people, a space elevator should be located on or next to an ocean and away from any large population centers. Environmental Impact – Any elevator site will need major infrastructure improvements constructed around it and thus could not be placed in an environmentally or ecologically sensitive area.

Would a space elevator be stable?

Even with adequate materials, space elevators might be highly unstable. Gravitational tugs from the Moon and Sun, as well as pressure from gusts of solar wind, could shake the tether, potentially causing the elevator to crash into nearby satellites or space junk. Thrusters might be needed to keep the tether in line.

What is the principle of a space elevator?

Modern concepts of space elevators are based on a different principle — tension. The elevator would be built using a cable attached at one end to the Earth’s surface and to a massive counterweight at the other end, above geostationary orbit (35,786 km). Gravity would pull downward on the cable,…

What is the gravitational force on a space elevator cable?

Apparent gravitational field. A space elevator cable rotates along with the rotation of the Earth. Therefore, objects attached to the cable would experience upward centrifugal force in the direction opposing the downward gravitational force.

How long would it take to travel in a space elevator?

Travel on a space elevator would not be fast! The travel time from one end to the other would be several days to a month. To put the distance in perspective, if the climber moved at 300 km/hr (190 mph), it would take five days to reach geosynchronous orbit.

What are the different types of space elevator?

There are a variety of space elevator designs proposed for many planetary bodies. Almost every design includes a base station, a cable, climbers, and a counterweight. For an Earth Space Elevator the Earth’s rotation creates upward centrifugal force on the counterweight.