Links to other Space/Astronomy Sites

Observing Satellites

Visual Satellite Observer's Home Page

General information on observing visible satellites

Information on Satellites
The following sites offer information about the satellites themselves, such as their purpose, mass, dimensions etc.

Jonathan's Space Report	Issued about once a week, it provides information on all recently launched satellites.
Mark Wade's Encyclodedia Astronautica	Information on most satellites in Earth orbit and beyond
NASA Human Spaceflight Pages	Information on the ISS and Space Shuttle missions
JPL's Basics of Space Flight	An online training module to help you grasp some of the concepts of deep space missions.

Sources of Satellite Orbital Elements

Space-Track	Run by the US Department of Defense, responsible for making unclassified orbital elements available to the public. This organisation has taken over the task from the OIG which was run by NASA. You will need to get an account to access the data.
Mike McCants' Elements	A good page containing elements of satellites organised by category, and stored in ZIPped files for easy downloading. Also contains elements for classified satellites, and a single large file with the most recent elements of most satellites.
Celestrak WWW	Historical data for a selection of satellites

Space Agencies

NASA	National Aeronautics and Space Administration
DLR	The German Aerospace Research Center
ESA	The European Space Agency
UKSA	The UK Space Agency
CNES	The French Space Agency
ASI	The Italian Space Agency
JAXA	The Japanese Space Agency
IKI	Russian Space Research Institute
CSA	Canadian Space Agency
ISRO	Indian Space Research Organisation

Partner Companies
INSYEN AG