Parabolic Arc: Since the launch of Zarya, the first module of the International Space Station (ISS), on November 20, 1998, five space agencies have worked together to build the orbiting science lab-one of the most complex scientific and technological endeavours ever undertaken. On November 20, 2013, celebrate with us as we launch a world-wide wave on Twitter to cheer the ISS! Starting at midnight GMT — the official time zone of the ISS — the European Space Agency (ESA), the Japan Aerospace Exploration Agency (JAXA), the National Aeronautics and Space Administration (NASA), and the Canadian Space Agency (CSA) are launching a world-wide wave for ISS on Twitter! We will issue 24 ISS-related tweets in 24 hours, one tweet every 60 minutes at the top of the hour. Join the wave by following the hashtag #ISS15! Keep the wave rolling by telling us what the International Space Station-its science, technology and astronauts-means to you. Head outside and see the space station for yourself. If you’re lucky enough to photograph it, share your photo by tagging it with #ISS15. It’s your space station, and it’s your turn to get involved! How will you do the world-wide wave? Join the #ISS15 wave! Follow these Twitter ...