***
API
***

.. autosummary::
  :toctree: generated
  
  pygnuastro.cosmology.age
  pygnuastro.cosmology.angular_distance
  pygnuastro.cosmology.to_absolute_mag
  pygnuastro.cosmology.critical_density
  pygnuastro.cosmology.comoving_volume
  pygnuastro.cosmology.proper_distance
  pygnuastro.cosmology.luminosity_distance
  pygnuastro.cosmology.distance_modulus
  pygnuastro.cosmology.velocity_from_z
  pygnuastro.cosmology.z_from_velocity

  pygnuastro.fits.img_read
  pygnuastro.fits.img_write