why i think the sky is a dome thoug probably im wrong

[winny]

The radius of the Earth is over 6000 Km not 600.

Nasa like to take photo's in the daytime, dunno why... maybe because then you can see what they're taking a picture of. And you're cherry picking, there are photos of the day/night boundary from nasa. Look harder.

Also if you'd look the shadow on the moon during an eclipse is nothing like clearly defined, it has a blur (again there are 100's of photons online that show this).

So yes, you probably are wrong.