Planet Visibility Explorer
Find when planets are above your horizon. Compare rise and set times, sky positions and dark hours for your location.
When is a planet above the horizon at my location?
Choose the Sun, Moon or planets and your observer coordinates. Compare altitude curves, move through five-minute samples and inspect rise, set and upper-transit events. Set a minimum altitude and maximum Sun altitude to find sampled observing windows. Export positions as CSV, events as an ICS calendar and your settings as a reusable project.
Find your window to look up.
Choose a place and time. Explore what happens overhead.
Enter times as UTC, for example 2026-10-01T00:00:00Z. Display zone uses names such as America/Toronto. Latitude is positive north; longitude is positive east.
Your chart and event list will appear here.
Three simple steps
How to use Planet Visibility Explorer
Choose an observer location, UTC time range and display time zone.
Calculate, explore the results and inspect event details.
Save your settings and download a calendar or data report.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
Calculations run locally in a cancellable browser worker. Terrain, clouds and weather are not modelled. Times use UTC inputs and your chosen IANA zone for display. Save a project file to keep your settings.
Dates 1900–2100; up to 72 hours and ten objects. Curves and observing windows use five-minute samples; rise/set and transits are searched separately. Local obstructions and actual visibility are not predicted.