Astronomy Toolkit
How to use
What it does
Astronomy calculations and lookups: estimate the position and altitude of the sun and moon at a given moment, determine the current moon phase and whether it is waxing or waning, look up solar and lunar eclipse times, list positional information for the visible planets, check meteor shower activity periods and peak dates, and estimate aurora probability from geomagnetic parameters. Useful preparation before a night of observing. A procedural star-field with constellations is merged as an extra tab.
How to use it
Tabs at the top switch between the features. Position calculation needs a date, a time and the observer's coordinates, returning azimuth and altitude; the moon phase panel draws the current phase and gives the dates of the next full and new moons; eclipse tables are queried by year with notes on visibility; the planet panel lists rise and set times; the meteor shower panel provides an annual list; the aurora panel estimates probability from a latitude and a geomagnetic index.
FAQ
Should I take the azimuth and altitude figures seriously?
They are astronomical estimates from your date, time and observer coordinates — good enough to know roughly where the sun or moon will sit when planning a session, but use professional ephemeris software for navigation or research.
How is the aurora probability worked out?
From your latitude and a geomagnetic activity index, the tool returns a rough likelihood; it describes what those conditions typically allow, not a promise for any particular night.
What does an eclipse lookup include?
Querying by year lists when each solar and lunar eclipse happens, with notes on its visibility region, so one glance tells you whether the event is worth waiting up for.
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