Know what's in your sky,
right now.
Efemora shows the real-time position of the Sun, Moon, planets and the ISS for any location on Earth — with a live sky chart and plain-language hints on where to look.
Open the AppSun, Moon & Planets
Altitude, azimuth and pointing direction for seven naked-eye bodies, computed from first-principles astronomy algorithms.
ISS Tracking
Live ISS position and upcoming visible passes for your location, with pass trajectory on the sky chart.
Sky Chart
Interactive circular chart showing every body's position across the full sky dome, oriented to your compass heading.
Moon Phase
Illumination fraction, phase name and phase angle — always in sync with the date and time you choose.