A Fully Customizable Procedural Space HDRI Node group and multiple Image resloutions (8K,4K and 2K) of this HDRI.
And with just 2 more Dollars you will get a Highly Optimized Galaxy Material(you can aslo buy The Galaxy Material Separately).

Space HDRI:The HDRI Images works Perfectly the same in EVEE and Cycles. The World Material Node Group also works the same in EVEE, Cycles.

Note:The Only Diffrence between EVEE and Cycles is how the Objects reflect/interact with The World HDRI
It's recommended to use the HDRI Images if you want faster render time, but if you want better quality and you want to customize the hdri it is better to use the Node group

Galaxy Material:Highly Optimized Galaxy Material with fast render time.
It only uses the Surface Output Material rather than Volume Output Material which make your viewport smooth and speeds up your render time even if you have a Normal PC. I also framed some Nodes in the material so you can easly understand it and change some things in it like for example Stars strength/color.