For the launch of Sentinel-2A, ESA is inviting you to take part in a photo contest focusing on the theme of 'colour vision'. Enter for a chance to win a trip to ESA's operations centre for the satellite's launch event.

The Sentinels are a fleet of satellites designed specifically to deliver the wealth of data and imagery that are central to the European Commission's Copernicus programme.

This unique environmental monitoring programme is making a step change in the way we manage our environment, how we understand and tackle the effects of climate change and even safeguard our everyday lives.

Sentinel-2 carries an innovative high-resolution multispectral imager with 13 spectral bands for a new perspective of our land and vegetation.