Aliens

How does this make you feel? on Its own, and as far as the colour and composition goes, it probably doesn't create too many emotions, the emotion lies in the context of the image. In my opinion there are two types of immersive visual works, there are pieces that create immersion on a purely visual level, the colours, composition, setting, when a photo or landscape painting is powerful enough to make you feel like you are actually there.

The other type is contextual immersion, which the image above displays, in order to reach immersion (which usually jumps out and pulls you in), you have to consider what the image means, you have to start exploring the implications of the image. This is the Andromeda Galaxy, over 2 million light-years away, and visible to the naked eye under the right conditions, it has 1 trillion stars (That's 1,000,000,000,000!), most of which will have planets, how many of them will be able to sustain life? the answer is simple : loads.

And that's just one galaxy, there are probably as many galaxies as there are stars in a galaxy, what does this have to do with colour? nothing.

Or does it?

Which image do you prefer? WHY? - I prefer the one with colour, but the greyscale image is how we all see the distant universe through a telescope, every image we see of the universe outside of our solar system is "false" colour (sort of, it's actually representative of the physical properties of what we see), but these images are still beautiful, even though they are coloured "scientifically".

Do Astronomers colour the Hubble space telescopes images in order to strategically create mood? no, they do it in order to convey as much scientific information as possible, but we still find them beautiful - because science is nature, and nature is beautiful.