gammapy.data
gammapy.irf
MapCoord
SkyCoord
gammapy.maps
gammapy.image
gammapy.image.models
gammapy.cube
gammapy.detect
gammapy.background
gammapy.spectrum
gammapy.time
gammapy.stats
gammapy.datasets
gammapy.catalog
gammapy.astro.source
gammapy.astro.population
gammapy.astro.darkmatter
gammapy.utils.coordinates.
angle_to_radius
Radius (pc), distance(kpc), angle(deg)