Earth in the middle as a plain circle, the Moon-link Sun, Moon and planets around it, and the white barycentric displacement vector (BDV). Every planet line runs from its dot through the small Earth-Moon barycenter dot inside Earth to the far side, and the white BDV runs from the Sun dot through that same barycenter dot to the far side, exactly as on the globe. The EMB button switches that meeting point to the Earth-Moon barycenter (on) or Earth's centre (core mode). The pink SSB mark sits at a fixed step beside the Sun and flips sides exactly as the globe marker does, and Auckland (AUK) / New Delhi (DEL) / London (LON) / Lima (LIM) dots ride the Earth rim with rotation so direction can be guessed. Rings are schematic spacing only, directions are true for the date above. Opens on the current time. Dates are day/month/year.
Earth-centered sky · top-down ecliptic
North is up, 0° points right. Dots sit on even rings so crowded planets stay readable; only the bearing from Earth is astronomical. The pink SSB dot sits at a fixed step beside the Sun so its side-switch is visible, matching the globe marker. Meteor shower radiants ride the outer rim in green at their ecliptic bearing, with the shower nearest the chosen date in gold; tap one for its peak date. Tapping a dot shows its bearing below.
Documented volcanic eruptions · click to jump
Onset dates and vent locations from the Smithsonian Global Volcanism Program and historic records. Tapping an eruption sets the graph above to 00:00 UTC on that date so the Sun, Moon, planet bearings and BDV match the day it began.
Locations are the volcano vent; the 2D view is geocentric so only the date changes the sky, the coordinates tell you where on Earth it happened.