"Using iCalendar on macOS" matching MCP connectors:

Find craters, mountains and landing sites on the Moon, Mars and more to 3D print in OrbitStudio.

Read-only machine payment preflight using dated MEO evidence, with explicit unknowns.

NASA mission & space news: launches, science. $0.01/query. Register in-session — free testnet funds.

Space weather: Kp index, solar flare flux, alerts. $0.01/query, free testnet funds.

NASA astronomy photo of the day + imagery. $0.01/query. Register in-session — free testnet funds.

Civil twilight hour-band UTC

Rocket launch schedule: SpaceX, Falcon, Electron. $0.01/query, free testnet funds.

Julian Day Number integer band

GPS second-of-week band

sidereal day fraction band

Julian Day integer band

Modified Julian day band

Julian day number band