Links

This web page contains links to other websites which are not under the control of and are not maintained by Channel 4 Television. Channel 4 Television is not responsible for the content of these sites and does not necessarily endorse the material on them. 

National Physical Laboratory: atomic timekeeping. Measurement of time; why we have leap seconds; atomic clocks and how they work. How time is maintained around the UK by means of radio signals. Why this is important. Also, an FAQ about time and timekeeping.
Level: student and teacher.
http://www.npl.co.uk/npl/ctm/time_measure.html

NIST: US Government time site. An online exhibition about how time has been measured through the ages.
Level: student and teacher.
http://physics.nist.gov/GenInt/Time/time.html

Royal Observatory, Greenwich: Harrison exhibition. Pictures and information about the famous clocks made by John Harrison in the eighteenth century and how they were used for navigation.
Level: student and teacher.
http://www.rog.nmm.ac.uk/museum/harrison/index.html

Ordnance Survey. The Government organisation that maps the country.
Level: student and teacher.
http://www.ordsvy.gov.uk/

‘Time Lords’. Guardian article about the scientists who maintain time standards around the world.
Level: teacher.
http://www.guardianunlimited.co.uk/Archive/Article/0,4273,4061034,00.html

Landsat 7. The NASA spacecraft mapping the Earth’s surface to show different types of terrain and land use.
Level: student and teacher.
http://landsat.gsfc.nasa.gov/