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• Herschel

  18 Apr 2012

  The European Space Agency's (ESA) Herschel Space Observatory is the largest ever infrared space observatory. It collects radiation from some of the coldest and most distant objects in the Universe. The UK has led the development of one of the three instruments on board.

• Hinode

  19 Apr 2012

  The Japanese Hinode mission is studying the processes involved in solar flares and Coronal Mass Ejections. These events send billions of tonnes of particles spewing out into space and can have a major effect on the Earth.

• Hipparcos

  17 Nov 2011

  During its three and a half year mission, Hipparcos pinpointed the positions, and measured distances, of more than 100,000 stars with an accuracy that had never been achieved before.

• HOTBIRD

  15 Nov 2011

  The HOTBIRDs are a series of satellites providing high powered broadcast communications.

• Hubble space telescope (HST)

  17 Nov 2011

  The Hubble Space Telescope is one of the most important astronomical projects of all time. Orbiting 600 km above the Earth at eight kilometres every second, Hubble is our window into the cosmos.

• HYLAS-1

  19 Sep 2012

  The Hylas-1 communication satellite provides advanced high-speed broadband technologies and enable innovative internet-based services across Europe.