26 results for “astronomy”
Minimum speed to escape a body's gravity.
Speed of a circular orbit.
Relates orbital period to semi-major axis.
Event horizon radius of a black hole.
Recession velocity of galaxies with distance.
Luminosity of a star from radius and temperature.
Fractional wavelength shift of light.
Distance in parsecs from parallax angle in arcseconds.
Gravitational acceleration at a body's surface.
Observed brightness from luminosity and distance.
Relates apparent and absolute magnitude to distance.
Distance light travels in a given time.
Peak emission wavelength of a blackbody.
The attractive force between any two masses.
Energy of a mass in another body's gravitational field.
How a main-sequence star's brightness scales with its mass.
The maximum steady luminosity before radiation blows a star apart.
The maximum mass of a stable white dwarf.
Temperature of the radiation a black hole emits.
Radius where gravity bends light into a circular orbit.
Time between repeated alignments of two orbiting bodies.
Fractional stretching of light climbing out of gravity.
The zone where a body's gravity dominates over its host's.
Continuous day count used by astronomers to compare dates.
Earth's rotation period measured against the stars, not the Sun.
Difference between sundial (apparent) and clock (mean) time.