🎓 Doc Freemo 🇳🇱 @freemo@qoto.org

katie @katefeeti
is the #left "obsessed" with #gender, #sexuality, #race, etc, or are they just constantly having to defend people in #marginalized groups against a #right wing that's ACTUALLY obsessed with gender, sexuality, race, etc

είναι η #αριστερά «εμμονική» με το #φύλο, τη #σεξουαλικότητα, τη #φυλή, κ.λπ., ή απλώς πρέπει συνεχώς να υπερασπίζεται ανθρώπους σε #περιθωριοποιημένες ομάδες ενάντια σε μια #δεξιά πτέρυγα που ΠΡΑΓΜΑΤΙΚΑ έχει εμμονή με το φύλο, τη σεξουαλικότητα, τη φυλή κ.λπ.

#left_wing_agenda #woke_agenda #right_wing_agenda

In some previous posts, I’ve been chipping away at the question of how two objects falling into a black hole appear from each other’s vantage, and now I’ve put all the pieces together to answer a question @johncarlosbaez posed on his blog:

If a fleet of spaceships all fall into a black hole from different starting points along the same radial line, how would the other ships appear to one in the middle of the fleet?

https://johncarlosbaez.wordpress.com/2024/11/30/black-hole-puzzle/

The plot here shows the “apparent distance” of the other ships (as determined by the angle each ship subtends, if you know its size, or by its parallax if you view it from slightly different positions). It also shows where the ships were located, when the light now being received from them was emitted.

The details are quite different depending on whether we’re seeing a ship that is closer to the black hole than us, by means of “outgoing light” — light moving away from the hole — versus a ship further from the hole that we see by “incoming light”.

Because the event horizon itself is formed by the paths through spacetime traced by outgoing light rays, we see all the ships closer to the hole than us cross the event horizon just as we cross it ourself.

But the incoming light from ships that are further from the hole than us reaches us later, for any given r coordinate where it was emitted, and we hit the singularity at the centre of the hole before we see any light emitted from those ships when they crossed the horizon.