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Loading contentHow AsteriaStar builds an interactive three-dimensional universe from real measured coordinates — true parallax distances, to-scale orbits, and the celestial sphere — and how it stays honest about what can, and cannot, be placed in true 3D.
An interactive, to-scale model of the Sun's planetary system. Each orbit ring is drawn at the planet's real semi-major axis, so the true structure of the system — the crowded inner planets and the vast reaches of the outer ones — is genuine. Drag to rotate the system, scroll to zoom.
The nearest stars to the Sun, plotted at their true three-dimensional positions from measured parallax distances. This is the view a two-dimensional star chart cannot give: not just where a star lies on the sky, but how far away it truly is. Drag to fly around the neighbourhood; the Sun sits at the centre.
The stars of a constellation shown by their real directions on the celestial sphere — the pattern as it appears from Earth. Turn on the true-distance figures in the table and a striking fact appears: the stars of a constellation lie at wildly different distances and are not physically connected at all. The familiar shape is a line-of-sight illusion.
Our home galaxy and the Sun's place within it. The measured part of this picture — the local stellar neighbourhood — is the real 3D star field; the wider structure of the Galaxy (its disc, bulge, bar, spiral arms, halo, and centre) is presented from the galactic-structure catalogue as described components, because numeric galaxy-scale positions are not part of the data.