Lunar Space Elevator: Is a Rocketless Trip Possible?

Click For Summary

Discussion Overview

The discussion revolves around the feasibility of a lunar space elevator that does not utilize rockets or chemical propulsion. Participants explore the implications of such a system, including travel time, anchoring challenges, and the dynamics of movement between the Earth and the Moon.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that omitting rockets from a lunar space elevator could lead to impractically long travel times, questioning the feasibility of the concept.
  • Another participant points out the challenge of anchoring the base of a lunar space elevator due to the Moon's variable position relative to Earth, while noting that a space elevator to a geostationary satellite is theoretically simpler.
  • A different participant proposes a hypothetical scenario where a space elevator could dangle above the Earth's surface, questioning how fast the tip of such an elevator would move due to Earth's rotation.
  • One participant provides a fact about Earth's rotation speed, indicating that this motion would complicate the dynamics of a lunar space elevator.

Areas of Agreement / Disagreement

Participants express various viewpoints regarding the feasibility and challenges of a lunar space elevator, indicating that multiple competing views remain without consensus on the practicality of the concept.

Contextual Notes

Participants have not fully explored the assumptions regarding the mechanics of a lunar space elevator, including the effects of the Moon's motion and the implications of the Earth's rotation on the system's design.

BosonJaw
Messages
39
Reaction score
0
Lunar space elevator...

Based on my limited understanding of the idea.

If this system were to omit a rocket or chemical propellant power plant and is not an unbound free traveling vehicle, I would infer, given the distance of the journey the travel time may venture into the realm of the preposterous... Am I wrong?
 
Astronomy news on Phys.org
A space elevator directly to the moon has the disadvantage that the moon isn't always over the same place on Earth making it rather tricky to anchor the bottom of the cable.

A space elavator from the Earth to a geostationary satelite is theoretically quite simple, although a bit of a materials challenge. A simialir elevator from the moons surface to a satelite around the moon is even easier. Going between the two statiosn is pretty easy,
 
How fast the Moon?

Just supposing you dropped a space elevator from the Moon to the Earth. The bottom doesn't have to be attached to the Earth, the bottom could just, well, sort of dangle there over the surface of the Earth.

If you did do that, how fast would the dangling tip of the Lunar S.E. move over the surface of the Earth?
 
The Earth is rotating (at the equator ) at around 900mph (40,000km in 24hours)
Even ignoring the motion of the moon that is going to create problems.
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 65 ·
3
Replies
65
Views
13K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 15 ·
Replies
15
Views
6K
  • · Replies 23 ·
Replies
23
Views
5K
  • · Replies 9 ·
Replies
9
Views
7K
  • · Replies 35 ·
2
Replies
35
Views
4K
  • · Replies 1 ·
Replies
1
Views
6K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 5 ·
Replies
5
Views
13K