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Welcome to the Skyfield Repository

Skyfield is a pure-Python astronomy package
that is compatible with both Python 2 and 3
and makes it easy to generate high precision research-grade
positions for planets and Earth satellites.

.. code-block:: python

from skyfield.api import load

planets = load('de421.bsp')
earth, mars = planets['earth'], planets['mars']

ts = load.timescale()
t = ts.now()
position = earth.at(t).observe(mars)
ra, dec, distance = position.radec()

print(ra)
print(dec)
print(distance)

The result:

::

10h 47m 56.24s
+09deg 03' 23.1"
2.33251 au

Skyfield’s only binary dependency is NumPy.
Once that is available, Skyfield can usually be installed with::

pip install skyfield

Here are the essential project links:

• Home page and documentation <http://rhodesmill.org/skyfield>_.

• Installing Skyfield <http://rhodesmill.org/skyfield/installation.html>_.

• Contributing to Skyfield <https://github.com/skyfielders/python-skyfield/blob/master/Contrib.rst>_.

• Skyfield package <https://pypi.python.org/pypi/skyfield>_
  on the Python Package Index.

• Issue tracker <https://github.com/brandon-rhodes/python-skyfield/issues>_
  on GitHub.