How are real celestial events named?

Astronomers use a mix of conventions: comets carry their discoverers' names and a code, novae are named for their host constellation and year, and notable eclipses get descriptive epithets like the Great American Eclipse. This tool blends those traditions for fiction.

What event types are included?

The generator covers eclipses, planetary conjunctions, comets, meteor showers, novae and supernovae, and rarer phenomena like syzygies and occultations, each with its own naming pattern.

Can I use these for a fantasy calendar?

Yes. The names suit recurring festivals, prophecies, and dated events in fantasy and science-fiction world-building. Pair an event with an in-world year to anchor it on your timeline.

Are the designation codes meaningful?

The optional codes mimic the format of real designations, such as a letter, a year, and a serial number, but they are decorative and carry no real astronomical meaning.

Is any data sent to a server?

No. All the word lists and patterns are bundled with the page, and every name is assembled in your browser, so nothing about your choices is uploaded.

Celestial Event Name Generator

Real astronomical events get evocative names: the Great American Eclipse, Comet Hale-Bopp, the Leonid meteor storm. This tool borrows those naming traditions to invent fictional celestial phenomena for science fiction, fantasy calendars, and tabletop world-building, complete with optional designation codes that echo how astronomers catalogue the real sky.

How it works

The generator pairs a curated list of evocative epithets, such as Crimson, Silent, and Twin, with an event type chosen from eclipses, conjunctions, comets, meteor showers, novae, and rarer occultations and syzygies. Comets and novae additionally receive a designation code in the style of real catalogues, combining a letter prefix, a four-digit year, and a serial number, for example C/2317 N4. Each event type uses a naming pattern that fits how its real counterpart is described.

Tips and notes

For a calendar festival, an eclipse or conjunction name works well, such as The Crimson Eclipse.
Comets and novae feel most scientific with their designation code attached.
Reuse a memorable event name across a story as a recurring omen or anniversary to tie your timeline together.