Tap to select, hold to fly there, and the sky you move through is measured rather than imagined: HYG v4.4 and Gaia DR3 for the stars, the NASA Exoplanet Archive for the planets, OpenNGC and HyperLEDA further out, a 2024 dust map for the murk. Where the data runs out, Shane Loeffler says so — “the generated parts are marked as generated wherever they appear.” No advertising, nothing for sale.