ns1
@ns1@feddit.uk
- Comment on Time travel doesn't work unless you also have teleportation. If you travel to the past/future, Earth will be in a different position in its orbit, and you'll die in space. 1 hour ago:
This is interesting because the most “realistic” (i.e. still not realistic) depictions of time travel in fiction involve travelling through a singularity or wormhole. So you probably have to be in space to start with, but also both ends of the wormhole have mass so they can be orbiting a planet or star and stay within a stable distance of it. It solves this particular problem (just leaving the other usual problem of causality!) It also proves your point since it does allow travelling in space, in fact it allows travelling faster than light.
I think the converse is true as well, that if faster than light travel is possible then time travel must be possible, at least if you take relativity at face value. As others have pointed out there’s no universal reference frame, and for any journey that is faster than light in one reference frame, there is another frame in which the journey goes backwards in time.
- Comment on UK to build 12 nuclear submarines in preparation for potential war with Russia 4 weeks ago:
Thank you, this prompted me to go and look up the meaning of that song. It hadn’t occured to me before that it was about the Falklands
- Comment on [deleted] 1 month ago:
This post has a list of casual communities which might help: lemmy.world/post/2216085
- Comment on What does ZFC do that Peano arithmetic can't do? 1 month ago:
- Comment on Can anybody anywhere in the world 🌍 create a website like lemmy and Mastodon with possibility of creating multiple instances and feed it into the fediverse so that it gets shared into both lemmy and? 2 months ago:
Not sure exactly what the question is but I’m fairly sure the answer is yes. 😀 Anyone can start a Lemmy/Mastodon instance and anyone can create new software that federates with it.
- Comment on I made a tiny WebGL game/thingy! 2 months ago:
Very cool! I’m still impressed by seeing anything 3D in a browser even though I know it’s been possible for a while.
- Comment on I’m new to Lemmy 3 months ago:
Welcome! Good to have you here
- Comment on Is there a Lemmy equivalent of "r/bestofredditorupdates"? 3 months ago:
Doesn’t have the “updates” part, but there is !bestoflemmy@lemmy.world
- Comment on Centuries-old leasehold system to be abolished in England and Wales 3 months ago:
Good to see, but a shame that the plans only apply to new housing developments, and they’re being very vague about anything after that. Seems to take an extremely long time to do anything on this issue despite the changes apparently having wide support
- Comment on How are you dealing with the UK's Online Safety Act, that comes into effect this March? 5 months ago:
[feddit.uk/post/21568696](Feddit UK post about this)
The admins are hopeful at the moment that we will be able to comply without too much trouble
- Comment on Brought my Celestron NexStar 6SE out on a camping trip last weekend and pointed it at the moon 8 months ago:
Not an expert but I’d guess that is Tycho crater, and the stripes are called its ray system en.wikipedia.org/wiki/Ray_system
- Comment on My blog now has Lemmy comments 8 months ago:
Nice work!