What is the fastest speed we can travel in space?

  • Context: Graduate 
  • Thread starter Thread starter Tabaristiio
  • Start date Start date
  • Tags Tags
    Space Speed Travel
Click For Summary

Discussion Overview

The discussion revolves around the theoretical limits of speed in space travel, particularly focusing on the possibility of traveling at speeds approaching the speed of light. Participants explore various factors that could influence safe travel at high velocities, including acceleration, fuel limitations, and potential safety risks associated with high-speed travel.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that if acceleration is managed to avoid G forces, it may be possible to travel at high speeds, but questions what maximum speed could be safely achieved and what safety risks might arise.
  • Another participant emphasizes that maintaining continuous acceleration poses significant challenges.
  • A different viewpoint raises concerns about encountering matter in space, noting that even small particles could cause high radiation damage at relativistic speeds.
  • One participant mentions the need for modifications to adjust course during travel, highlighting practical considerations in a hypothetical scenario.
  • Another contribution points out that fuel limitations are a significant constraint, as increased mass requires more fuel for propulsion, referencing the Tsiolkovsky rocket equation.
  • One participant argues that, theoretically, a spaceship could achieve arbitrary speeds with low acceleration, asserting that constant acceleration could allow a ship to reach near light speed without mechanical issues, while acknowledging practical challenges.

Areas of Agreement / Disagreement

Participants express a range of views on the feasibility and safety of high-speed space travel, with no consensus on the maximum achievable speed or the primary limiting factors. The discussion remains unresolved regarding the implications of various challenges and risks associated with such travel.

Contextual Notes

Limitations include assumptions about perfect engineering and the neglect of practical issues such as fuel, mass, and obstacles in space. The discussion does not resolve the complexities of acceleration and its effects on spacecraft integrity.

Tabaristiio
Messages
61
Reaction score
2
Without taking into consideration any G forces or other phenomena's. So say we slowly and gradually speed up, eliminating any risks of G Force related issues. Fly in empty space without any obstacles in our way and will not be in our way in this scenario, and finally the spacecraft is perfectly engineered and cannot go faulty. Can we continue traveling faster provided we were below the speed of light? Or will we experience problems a long way before we reach anywhere near the speed of light? If so, at around what max speed could we safely travel and what would some of the safety risks be? Ship becoming unstable? Weight or energy increasing? Or could we theoretically travel safely at 99% of the speed of light? Please state what are some possible safety problems if there are any.

Thanks
 
Physics news on Phys.org
In my opinion, keeping the acceleration going would be the most difficult problem of them all.
 
Running into spurious matter might be a problem, even hitting hydrogen atoms at relativistic speeds will result in high radiation.
 
This is an extremely hypothetical situation; I think we would want to make mods for adjusting course and such.
 
Totally ignoring the engineering / practical problems (fuel, mass, obstacles, etc) that make it completely impossible, there is nothing inherently stopping a spaceship from going at any arbitrary speed as long as the acceleration is low enough to keep it from suffering metal fatigue.

The point is, the ship doesn't CARE how fast it is going, only how much acceleration is being applied to it. A constant acceleration of 1G would likely in no way cause any mechanical problems with a ship and it would reach near light speed reasonably quickly. I've seen the calculations here on this forum and as I recall, .99c takes about a year of ship time at 1G.

As to what's practical, that's a whole other can of worms.
 
  • Like
Likes   Reactions: Imager

Similar threads

  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 22 ·
Replies
22
Views
7K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 53 ·
2
Replies
53
Views
7K
  • · Replies 22 ·
Replies
22
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
60
Views
5K