An interactive visualizer for
Paul Fellows'
excellent "Once Around" series of astronomy YouTube videos.
Explore the night sky and discover the celestial objects featured in the series.
Data Sources
Stars: Hipparcos Catalogue (~118,000 stars) with fallback to Yale Bright Star Catalog
Planets: VSOP87 planetary theory for high-precision positions
Moon: Simplified lunar ephemeris based on Meeus's Astronomical Algorithms
Constellations: IAU constellation boundaries with stick figures