com.cyclecalcs/astronomy

up checked 2026-11-11T06:39:56.820Z

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Publisher-provided title

CycleCalcs Astronomy

Publisher-provided description

Read-only astronomy calculations: sun, moon, planets, eclipses, twilight and star positions.

Summary by lookupd

Computes sun, moon, planet, eclipse and star positions, twilight, rise/set times and dark observing windows for a location.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http astronomy https://www.cyclecalcs.com/mcp

Codex, remote (streamable-http)

codex mcp add astronomy --url https://www.cyclecalcs.com/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "astronomy": {
      "url": "https://www.cyclecalcs.com/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (12 tools)

Publisher-provided text

• astro_sky_today One-call snapshot of the whole sky for a place and moment: moon phase and illumination, which planets are up and worth looking at, the next eclipse, and (with a
• astro_sun The complete solar day for one location: sunrise, sunset, solar noon, day length, civil, nautical and astronomical twilight boundaries, and explicit polar day/n
• astro_moon The Moon at an instant or as a daily series: phase name and angle, illuminated fraction, distance, apparent size, libration, bright limb, and the next quarter p
• astro_moon_phases Every new moon, quarter and full moon in a window (or the next few from a date): each with its exact instant, distance, apparent size, supermoon classification
• astro_positions Exact positions for up to 20 bodies at an instant or over a time grid: right ascension and declination in both J2000 and of-date frames, ecliptic longitude and
• astro_rise_set Rise, upper transit, set and lower transit for one body at one location, with an explicit status at extreme latitudes (circumpolar, never rises) instead of miss
• astro_eclipses Solar and lunar eclipses: the next or previous from a date, or all in a range, with type, magnitude, obscuration, Saros series and global geometry. A solar ecli
• astro_dark_window The genuinely dark, moonless observing window for a night: astronomical night intersected with the Moon being down, ranked across up to 62 nights with a trend.
• observing_windows Is tonight good for observing here, and when? The clear, dark windows of tonight, and of the next nights the hourly cloud forecast covers, for one place: astron
• astro_planet_board All eight planets in one call for a date and optional location: constellation, magnitude, apparent size, elongation from the Sun, morning or evening sky, retrog
• astro_planet_events Dated planet events. For Mercury and Venus, the apparition cycle: inferior and superior conjunctions, greatest eastern and western elongations, peak brightness
• astro_find_place Resolve a place name to coordinates, region, country, IANA timezone and a stable place_id, or reverse-look-up the nearest places to a lat/lon. Results are GeoNa

Details

• Version: 1.1.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 519 ms
• First indexed: 2026-11-01T08:53:35.277Z
• Last seen in registry: 2026-11-01T08:53:35.286Z
• Website: https://www.cyclecalcs.com/api/mcp.html

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[![lookupd status](https://lookupd.com/badge/com.cyclecalcs/astronomy.svg)](https://lookupd.com/servers/com.cyclecalcs/astronomy)

• 62092 servers
• Last crawl: 2026-11-11T17:17:22.074Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp