Private Apps

Planets visible tonight

Which planets are up tonight from where you are, when each one is highest, which way to face and how bright it will be — for new telescope and binocular owners, families and astrophotographers. Calculated on your device.

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How “visible” is decided

Accuracy

Positions come from Astronomy Engine (VSOP87 and NOVAS-based; its author states accuracy within ±1 arcminute and tests it against NOVAS and JPL Horizons). Before release this app is checked against NASA JPL Horizons for Mars over New York, Jupiter over Seoul, Saturn over London, Venus over Sydney and Jupiter's rise, transit and set at Los Angeles: every position within 0.1° and every time within 2 minutes.

Astronomy Engine © 2019–2025 Don Cross, MIT License — license text.

Privacy

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