Nonsense. You can make 2 objects appear pretty much any size relative to each other depending on your viewpoint/what kind of lens you use.

This is especially noticeable in 3D renderings where you can make your "lens" any size/shape you want.

Doesn't hurt to play around in one to see how much of an effect this can have on how we perceive objects.

In this case there's nothing special going on though. The moon is really as far away as it looks.

Earth and moon are separated by a distance roughly equal to 30 earth diameters.

What you may think of are some shots you've seen from moon's surface, which are usually cropped/zoomed in to make earth appear larger.

>Earth and moon are separated by a distance roughly equal to 30 earth diameters.

I admit I had to look this up simply because it sounds so off. I knew both numbers but never thought about them together. The moon is so much closer than I've always perceived it to be.

The Holy Bible

Can someone explain to me how a seal works in a vacuum?

The same way they work everywhere else. Its just a pressure differential and a relatively small one compared to things like high pressure gas tanks we have here on earth. The 14PSI they need to keep in vs the 0 PSI outside is relatively small compared to even something like a tubeless road bicycle tire.

Is there something in particular you're interested in?

Temperature swings affecting the seal materials are probably a bigger issue than the pressure differential. Your car's tires handle a similar ~1 atmosphere seal easily.