Add 'cosmo' cosmology calculation astronomy library.
diff --git a/Projects.md b/Projects.md
index 44eb80b..20a1611 100644
--- a/Projects.md
+++ b/Projects.md
@@ -98,6 +98,7 @@
 
   * [go-fits](https://github.com/siravan/fits) - FITS (Flexible Image Transport System) format image and data reader
   * [astrogo/fitsio](https://github.com/astrogo/fitsio) - Pure Go FITS (Flexible Image Transport System) format image and data reader/writer
+  * [cosmo](https://github.com/wmwv/cosmo) - Cosmological distance and time calculations for common cosmologies (Friedmann-LemaƮtre-Robertson-Walker metric).
   * [gonova](https://github.com/pebbe/gonova) - A wrapper for libnova -- Celestial Mechanics, Astrometry and Astrodynamics Library
   * [meeus](https://github.com/soniakeys/meeus) - Implementation of "Astronomical Algorithms" by Jean Meeus
   * [novas](https://github.com/pebbe/novas) - Interface to the Naval Observatory Vector Astrometry Software (NOVAS)