Nugatory's latest activity

Something I didn't learn in school (or maybe just misremembered) is that Magellan did not return to Spain, he was killed in the...

The term “fabric” is used as a metaphor in unserious descriptions of relativity to avoid the math required for a real explanation of the...

There is a (possibly apocryphal) account of great consternation when Magellan returned to Spain and his ship’s log was missing a day….

There is not. Nothing stops you from writing down a wave function and a Hamiltonian with spherical symmetry. These might not describe...

To @nataliaeggers: Let me elaborate a bit more along the lines presented by @jbriggs444. Suppose you have a collection of ##10^{24}##...

From the very first post in this thread: “the moment when B has ##|b>_B##” is specifying an event.

The collapsed state is a mixture of ##|+-\rangle## and ##|-+\rangle##; the uncollapsed state is a pure superposition of the two. These...

@Filip Larsen said in a later post that this was decades ago. Depending on how many decades ago (Python is 35 years old) this would...

We can’t say for these exact images because we don’t know where they came from - they may be real photos or they may be simulation...

The thread will remain closed.

You're still not getting it. If we are moving inertially relative to each other then either of us could validly claim to be at rest and...

You are just cheating yourself out of essential background understanding (which is the really fun part) if you've skipped chapters 1-3...

There’s no “if” here, dark matter is defined to be the stuff we haven’t seen yet that is interacting with the mass we have seen. It...

Yes, seriously in some philosophies of ethics and less seriously in new-age pseudo-philosophy. However this thinking has proven...

If you are interested in Multiverse theories, you could start here: https://en.wikipedia.org/wiki/Multiverse