[Spellchamp]

Hello, not a direct reply to your questions but you'd be right to say that most photos you see of space are inaccurate for colour. We call them "false colour" images.

Typically what you'll do is take images of the same object with a telescope at a variety of different wavelengths. The basic pattern is to use 3 images, and then use each one to represent a different colour from red, green and blue. Then layering one on top of another you can create an image that looks like the bright and colourful ones you typically see of nebula/pulsars etc.

This way you get lots of detail, since different parts of the celestial bodies are only visible at certain wavelengths. So a single wavelength image would be over saturated with certain effects.

So even though these are technically "false" colour images of space. There is a scientific reason for doing it.

Not saying that the photo in the article is false, I think it's just had a long exposure time.

Anyway, hope this helps understanding of astrophotography in general.