Since so many of you took the time to respond to this photo I am going to give you the first piece early so that you know I am just not playing around like others do.

The first one is AGNLF 51. If you do not know what it is that is ok because you have to be in this field to really understand it. Basically they are watching light disappearing into a black hole. They do this so they can find black holes or things blowing up or combining. They then take the data can try to make an educated guess about whatever it is they are looking for.
This is also used to measure red shift changes to our sun. Our sun is what you want to focus on. The next thing you want to ask yourself is why is it in a post from Elon Musk?

Think outside the box. There is so much here for you to find.

https://ui.adsabs.harvard.edu/abs/2009A&A...507..781S/abstract

http://sait.oat.ts.astro.it/MSAIt790408/PDF/2008MmSAI..79.1075G.pdf

2b0y？
https://www.rcsb.org/structure/2B0Y

Nice. Very nice.

Is the object with the red cross on a white background a flag?
It seems to have a little flex, so it might be a person.

Great eye. Who's flag could that be? Someone of today or of days gone by?

Here's the description I found for this flag.
Is this a world line where we're still fighting dragons (kabar)?
Or destroyed them?

The flag of England is the "Cross of St. George
The flag of England is a white flag with a red cross on it, symbolizing St. George (St. George). St. George (3rd century) is the patron saint of England and is credited with slaying the dragon.

When St. George's Cross was to be used as the flag of the Crusades in the 12th century, England used a white cross on a red background and France used a red cross on a white background, but in the 13th century, the English and French flags were switched. It is not known why this happened.