Astronomy

Astronomy is a branch of science that studies celestial objects and phenomena occurring in the outer space.

Links:

1. Wikipedia — Astronomy

Contents:

• Celestial Mechanics
  • Radius of planetary orbits from number
    • orbit_radius
    • planet_number
    • first_constant
    • second_constant
    • law
• Observational Astronomy
  • Absolute magnitude from apparent magnitude and distance
    • absolute_magnitude
    • apparent_magnitude
    • distance
    • distance_constant
    • law
  • Change in apparent magnitude from distance
    • first_apparent_magnitude
    • second_apparent_magnitude
    • first_irradiance
    • second_irradiance
    • law
  • Luminosity of star from absolute magnitude
    • luminosity
    • absolute_magnitude
    • law
  • Ratio of luminosities from ratio of masses of stars
    • first_mass
    • second_mass
    • first_luminosity
    • second_luminosity
    • law
• Observational Cosmology
  • Speed of galaxy from distance to galaxy
    • recessional_speed
    • distance
    • law
• Positional Astronomy
  • Angular altitude in upper culmination
    • altitude
    • latitude
    • declination
    • ninety_degrees
    • law
  • Latitude from zenith angle and declination
    • latitude
    • north_zenith_angle
    • south_zenith_angle
    • north_declination
    • south_declination
    • law
• Stellar Evolution
  • Approximate lifetime of stars located on the main sequence
    • star_lifetime
    • star_mass
    • star_luminosity
    • sun_lifetime
    • law
  • Lifetime of star on main sequence
    • lifetime
    • mass
    • indicator
    • ten_billion_years
    • law
  • Luminosity of Sun in future from luminosity in present
    • future_luminosity
    • present_luminosity
    • time
    • one_billion_years
    • law
  • Luminosity of Sun in past from luminosity in present
    • past_luminosity
    • present_luminosity
    • time
    • one_billion_years
    • law