Space & Astronomy Math Center
Angular measurements, telescopes, light travel, apparent size and orbital classroom models. 20 tools with purposes, formulas and worked examples.
Simple mode uses starting defaults for extra scenario controls. Advanced exposes those controls where available. Change an entry, then press Calculate.
Complete truth table
Formula, calculation steps & example
All 20 tools: purposes and formulas
- Vacuum light travel seconds — Use the labeled measurements to calculate vacuum light travel seconds.
A ÷ B (A, B, C refer to the labeled entries)
- Astronomical units to kilometers — Use the labeled measurements to calculate astronomical units to kilometers.
A × B (A, B, C refer to the labeled entries)
- Julian light-years to kilometers — Use the labeled measurements to calculate julian light-years to kilometers.
A × B (A, B, C refer to the labeled entries)
- Telescope visual magnification — Use the labeled measurements to calculate telescope visual magnification.
A ÷ B (A, B, C refer to the labeled entries)
- Telescope focal ratio — Use the labeled measurements to calculate telescope focal ratio.
A ÷ B (A, B, C refer to the labeled entries)
- Telescope exit pupil — Use the labeled measurements to calculate telescope exit pupil.
A ÷ B (A, B, C refer to the labeled entries)
- Approximate true visual field — Use the labeled measurements to calculate approximate true visual field.
A ÷ B (A, B, C refer to the labeled entries)
- Circular aperture area — Use the labeled measurements to calculate circular aperture area.
π × A² (A, B, C refer to the labeled entries)
- Aperture area ratio — Use the labeled measurements to calculate aperture area ratio.
A ÷ B (A, B, C refer to the labeled entries)
- Small-angle angular size — Use the labeled measurements to calculate small-angle angular size.
A ÷ B (A, B, C refer to the labeled entries)
- Radians to degrees — Use the labeled measurements to calculate radians to degrees.
A × B (A, B, C refer to the labeled entries)
- Degrees to arcminutes — Use the labeled measurements to calculate degrees to arcminutes.
A × B (A, B, C refer to the labeled entries)
- Arcminutes to arcseconds — Use the labeled measurements to calculate arcminutes to arcseconds.
A × B (A, B, C refer to the labeled entries)
- Orbital cycles in an interval — Use the labeled measurements to calculate orbital cycles in an interval.
A ÷ B (A, B, C refer to the labeled entries)
- Circular orbit path length — Use the labeled measurements to calculate circular orbit path length.
2π × A (A, B, C refer to the labeled entries)
- Path speed from distance and period — Use the labeled measurements to calculate path speed from distance and period.
A ÷ B (A, B, C refer to the labeled entries)
- Rotation period seconds — Use the labeled measurements to calculate rotation period seconds.
A ÷ B (A, B, C refer to the labeled entries)
- Scale solar-system distance — Use the labeled measurements to calculate scale solar-system distance.
A ÷ B (A, B, C refer to the labeled entries)
- Observation integration time — Use the labeled measurements to calculate observation integration time.
A × B (A, B, C refer to the labeled entries)
- Ideal independent-frame SNR factor squared — Use the labeled measurements to calculate ideal independent-frame snr factor squared.
B ÷ A (A, B, C refer to the labeled entries)
Definitions and source references
Unit definitions and selected model references:
- Virginia Tech: wing geometry and mean aerodynamic chord
- Aircraft Design course: tail volume definitions
- Prusa: filament and printer calculation references
- NIST: SI defining constants
- NASA: aerodynamic lift models
- Horizon Hobby: product and battery documentation
- Smithsonian: Maya calendar units
- NIST: frequency intervals and cents
- NIST: binary prefixes
- NOAA: nautical miles and knots
- RFC 3021: IPv4 /31 point-to-point links
- MDN: exact integer arithmetic
- NIST: international-foot unit conversions
- NASA/JPL: astronomical unit definitions
- NASA: ideal rocket equation
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