Astronomical Events 2026–2027

Solstices, equinoxes, and meteor showers — all dates verified against JPL DE440 ephemeris and IMO meteor shower calendar.

2026 Events

2027 Events

Frequently Asked Questions

How accurate are these astronomical event dates?
Solstice and equinox dates are calculated from JPL DE440 ephemeris data (the same planetary/lunar ephemeris used by NASA). Meteor shower peak dates follow the International Meteor Organization (IMO) annual calendar. All dates are in UTC.
Can I observe meteor showers from my location?
Meteor showers are visible worldwide, but the radiant altitude affects hourly rates. Use FastTool's Sidereal Time Calculator to plan when the radiant is highest at your longitude. The darkest hours after astronomical twilight are ideal — use our Twilight Calculator to find your window.
What is the difference between a solstice and an equinox?
A solstice occurs when the Sun reaches its northernmost (+23.44°) or southernmost (−23.44°) declination, giving the longest or shortest day. An equinox occurs when the Sun crosses the celestial equator (0° declination), giving roughly equal day and night worldwide.
Why are the events listed in UTC?
Astronomical events are independent of time zones — UTC is the universal standard. Convert to your local time by adding or subtracting your UTC offset. For example, Eastern Daylight Time (EDT) is UTC−4.

After the Event — Process Your FITS Captures

Captured FITS data during the celestial event? Turn raw astronomical data into stunning, wallpaper-quality images with AstroSky — a free Windows desktop app with intelligent auto-stretch, 12+ color maps, and 8K export.

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All tools on fastool.io run entirely in your browser — zero data leaves your device. No personal data is collected, stored, or transmitted to any server. Solar calculations use SunCalc.js; lunar data uses JPL DE440 ephemeris; coordinate transforms use publicly documented EPSG/OGC standards. This site requires no signup, no account, and no cloud processing.