Sol

Humans have tracked the movements of the sun, moon, and planets since before written history — using them to mark the seasons, navigate oceans, plan harvests, and build calendars that still echo in the ones we use today. Sol — Latin for "sun", named for the Roman solar deity, and a nod to Sól, the Norse goddess who carries the sun across the sky — brings that same obsession to Home Assistant, with rather better tooling.

HA-Sol is a high-precision celestial mechanics integration for Home Assistant.

• Fully local and offline. All calculations run on your Home Assistant instance. No external services, no rate limits, no outages.
• NASA JPL DE421 ephemeris. The same data used for spacecraft navigation, now powering your automations.
• Atmospheric refraction. Elevation calculations account for your actual elevation, temperature, and pressure — not just a spherical cow in a vacuum.
• Step-based updates. Azimuth and Elevation sensors fire when the body moves by a configurable amount (down to 0.1°), not on an arbitrary timer. Your automations trigger exactly when the position…
• Multi-location. Add as many locations as you want — your house, your cabin, anywhere on Earth.
• Multi-body. Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.