Real sky · mock for approval
Your birth moment, read in six traditions under the real sky.
True scale: real sizes and distances, so planets are dots. Visual scale: radii ∝ √R and distances ∝ √r, clearly not to scale.
Stars: Hoffleit & Warren, Bright Star Catalogue, 5th rev. ed. (1991), via CDS. Figures: d3-celestial © 2015 Olaf Frohn (BSD 3-Clause), after the IAU and Sky & Telescope charts. Milky Way: NASA/Goddard Space Flight Center Scientific Visualization Studio; Gaia DR2: ESA/Gaia/DPAC. Earth: Blue Marble Next Generation, Reto Stöckli, NASA Earth Observatory. Moon: NASA SVS CGI Moon Kit. Planet positions: JPL approximate Keplerian elements (Standish & Williams). Moon: Meeus ch. 47 via soniakeys/meeus (MIT). 3D star distances: HYG database v4.4 by David Nash, CC BY-SA 4.0. All positions here are mock grade.
No chart yet. Press “Compute my chart”, enter a birth moment, and the steps appear here.
Every value is computed in the browser with mock-grade formulas: JPL approximate elements, Meeus ch. 47, IAU 1976 precession, 4-term nutation. The production site uses the zodiaK core.