I built this tool to remove the friction from astrophotography planning and turn it into a single, coherent process.

Instead of jumping between catalogs, weather services, sky charts, and manual calculations, everything is unified into one system where objects, conditions, and imaging geometry are evaluated together—consistently and in real time.

At its core, the system respects the cosmic distance ladder—the fundamental framework used in astronomy to determine distances across the universe.

Universal Object Lookup

• Messier, NGC, IC, Caldwell, Sharpless, clusters, stars, galaxies, planets, moons, comets, and spacecraft — all searchable from a single box.
• Names and magnitudes — distances, velocities, fluxes, orbital parameters, closest approaches, ephemerides.
• One image per target for quick visual context.
• Camera framing with your setup — sensor, rotation, and focal length — computes FOV and fit for each target.

Weather Intelligence

• 14-day, hour-by-hour forecast restricted to true astronomical darkness.
• Conditions graded into a 0–100 Imaging Score — clouds, moonlight, humidity, wind, and pressure condensed into a single metric.
• Powered by Astronomical Timing for your exact position (set manually or by map), ensuring forecasts align with your true night sky.

Target Finder

• Tonight’s best deep-sky objects ranked by visibility, altitude, airmass, and angular size.
• Grades calculated using the same Astronomical Timing as the forecasts — factoring in sky darkness, moonlight, and observing windows at your chosen location.

Solar System Map

• Live, high-precision visualization of the Solar System using NASA JPL ephemerides.
• Shows real-time planetary positions and accurate elliptical orbits.
• All distances are computed relative to Earth for true observational context.
• Interactive view — zoom and pan to explore the current configuration.

How We Measure Cosmic Distances

Astronomical objects span vastly different scales, so no single method works for all. Distances are determined by a cosmic distance ladder — a hierarchy of techniques applied according to distance range:

• Parallax (nearby stars): Tiny apparent position shifts (e.g., Sirius) as Earth orbits the Sun yield direct distances through geometry.
• Gaia proxies (nebulae and stellar groups): Gaia’s precise parallaxes and proper motions provide distances to nebulae and young associations.
• NED-D (galaxies): For galaxies (e.g., M51, M106), standard-candle and empirical relations (Cepheids, Type Ia supernovae, Tully–Fisher) are compiled; we show the median value and number of estimates.
• Literature fits (clusters): Distances to clusters (e.g., NGC 346) come from isochrone fitting to stellar evolution models.
• Radial velocity (nearby galaxies): For galaxies such as NGC 3109, recession speed via Hubble’s law gives approximate distances, though local motions introduce uncertainty.
• Hubble redshift (quasars): For extremely distant sources (e.g., 3C 273), redshift z from cosmic expansion defines their cosmological distance.

Together these methods form a calibrated hierarchy: parallax anchors the nearest rungs, Gaia extends them, standard candles calibrate galaxies, and redshift reaches the edge of the observable universe.