In April, you are invited to join thousands of enthusiasts to invent and create applications to help space exploration and improve life on Earth at the International Space Apps Challenge.
During this app-jam, participants are challenged to use freely available data and rework them for new purposes or present them in new ways.
Can you return the Mars Curiosity rover to Earth, visualise Solar flares that are invisible to the naked eye, catch a meteor, improve air traffic control or print an ESA satellite?
ESA's main presence during the app-jam will be at Sapienza University in Rome. Sign up, bring your sleeping bag and be inventive.
Participation is free and events are organised in over 75 cities on all continents and beyond. The chances are that an event is being organised close to you.
With the exception of events on the International Space Station and in Antarctica, registration is still open. For a full list of locations and to register visit the Space Apps Challenge website.
ESA is one of the main partners of the Space App Challenge organised by NASA.