How it works
Four frames, one continuous geometry.
Universal Perspective moves you between four ways of looking at the same moment, so the sky stops being a picture and becomes a position.
01
Your horizon
Start with the view you actually have: a 180° panorama with the Sun, Moon, and visible planets placed at their real altitude and direction for your location and moment.
02
The ground turning
Step outside your own frame. The globe turns east beneath a fixed sky, which is why everything above you appears to drift west.
03
The solar system
Pull back to the real arrangement of orbits, switch between readable and true scale, and see where your horizon is pointing.
04
Another horizon
Add a second observer somewhere else on Earth and find one object both of you can hold in view at the same real moment.
What it computes
Positions are computed in your browser from published ephemeris models. Positions cover the Sun, the Moon, Mercury, Venus, Mars, Jupiter, and Saturn, recalculated for your location and the moment you choose rather than read from a fixed chart.
No account, no sign-up, and no install. Location is only requested when you ask for it, is stored in your own browser, and is rounded before it appears in a shared link.
Where it stops
- It shows astronomical geometry, not weather, clouds, or local obstructions.
- Distances and sizes are only to scale where the interface says so — readable mode deliberately exaggerates body sizes so they stay visible.
- The gravity sheets are teaching visualisations of relative gravitational depth, not literal spacetime renderings.
See it for your own horizon.
- Every position is recomputed for your location and chosen time.
- Where a view is deliberately not to scale, the interface says so.