open-source APIs & services for astronomical data:

iObserve on macOS and iOS

open-source astro libraries

open-source components for macOS pro apps


My name is Cédric Foellmi, a.k.a @onekiloparsec. I currently work as Head of Software in a tech startup focusing on Virtual Reality. I also have a Ph.D. in astrophysics, and a large experience at manipulating big telescopes and datasets. I have been working quite a few years for E.S.O. in Chile, especially in the beautiful La Silla Observatory, hence the pictures of this site.

Here you will find everything about the software I write. I am mostly located on the Internet during waking times. But on Earth I am located in the Alps, between France and Switzerland. 

The origin of this url, which became my signature, is to be found in the work I've done about a given black-hole in our galaxy.

Image Credits: P. Horálek/ESO (top) – myself (bottom)