TL;DR of the post, generated automatically.

A browser flight from Earth to Andromeda, at true distances.

• Scale: about 1 metre to 2.5 million light-years, built in three.js.
• Sky: about 110k HYG stars. Press V for the full-sky ultraviolet map.
• Feedback wanted: white blowout at UV landmarks, frame rate, scale glitches.