Use a tripod and a shutter speed between 15–25 seconds. Any longer, and the rotation of the Earth will turn your stars into "trails" rather than sharp points.
Avoid pure black. Real night skies have deep navy, charcoal, or dark purple undertones. Use "Curves" to crush the blacks but keep the highlights (the stars) crisp. 1366x768 Space Star Night Galaxy Nature Dark. D...
Apply a "High Pass" filter to the star layer. This makes the stars "pop" against the dark background, giving it that high-definition feel. 4. Optimization for 1366x768 Use a tripod and a shutter speed between 15–25 seconds