bright blue and purple object close by
Im new to this... how would I describe this please
The bright blue and purple object close by is a star, in our own galaxy, the Milky Way.
It looks like this because it's fairly bright (for stars in SDSS), and the software which processes the data to make the image goes a bit nuts for things this bright, creating these color #artifacts.
Here's the same field (more or less; different orientation) processed using different software: