![](https://pawb.social/pictrs/image/d96f1bab-be71-453d-b9be-59de25256aa0.jpeg)
![](https://lemmy.world/pictrs/image/7a3abe0c-c1ab-495c-bb0c-2e3621530d13.png)
You can think about it this way. In relativity:
- You’re not allowed to have any way to determine an absolute speed. If your perceived acceleration were to vary (for a constant thrust) depending on your speed, that would give you a mechanism to determine absolute speed, but absolute speed doesn’t exist in relativity.
- Rather than “nothing can go faster than the speed of light,” given that we’ve just determined that absolute speed doesn’t exist, the next rule is instead: you are not allowed to observe anything travelling faster than the speed of light relative to you, and relativistic effects will ensure that this is so.
The thread was started as a toot by a Mastodon user. All of the replies are actually Mastodon posts. Thanks to the magic of the Fediverse, these render in Lemmy as comments.