Merge pull request #2882 from ehsteve/gallery-allconstants

Added constants list to gallery

examples/units_and_coordinates/constants_reference.py

@@ -0,0 +1,20 @@
+# coding: utf-8
+"""
+===============
+SunPy Constants
+===============
+
+The example shows all of the solar physics specific constants provided by SunPy.
+"""
+
+from sunpy.sun import constants as con
+
+##############################################################################
+# All constants are stored in a dictionary. A list of all available keys
+# which describe each constant can be had with the following command.
+print(con.constants.keys())
+
+##############################################################################
+# The following command will display all constants as well as their values
+# in an astropy `Table <http://docs.astropy.org/en/stable/table/index.html>`_
+print(con.print_all())