New call for Rocket & Balloon Experiments for University Students

Are you a university student and looking for an exciting opportunity to gain hands-on experience outside of the lecture hall? Here is your chance to fly your experiment on a sounding rocket or a stratospheric balloon with the REXUS/BEXUS programme!

The Call for Proposals for 14th cycle of the Swedish-German REXUS/BEXUS programme is now open until the 14th of October 2020, 23:59 (CEST).

The REXUS/BEXUS Programme allows students from across ESA member states, Slovenia and Canada to apply for a unique opportunity to fly their experiment to the edge of space on board a sounding rocket (REXUS) or a stratospheric balloon (BEXUS). Every year around 20 teams participate in this exciting programme.

Selected teams will have the chance to take part in the scientific and technical adventure of developing an experiment, flying it and analysing their results. Through this hands-on experience, participants will gain practical knowledge on each step of the design of a space mission, from preliminary design through to testing and launch. Finally, they will be given the opportunity to attend an international symposium and present their findings to the scientific community. Throughout the process, participants are supported with training and feedback by agency and industry experts and have the opportunity to collaborate with student teams from many other countries.

The REXUS sounding rocket and the BEXUS stratospheric balloon

REXUS is a single stage rocket propelled by an Improved Orion solid motor and can reach an altitude of up to 90 km. The rocket is able to carry about 45 kg of payload and provides around 3 minutes of reduced gravity flight.

BEXUS is 12 000 m3 stratospheric balloon able to carry a payload of 40-100 kg to a floating altitude of 20-30km. The flight duration is usually between 1 and 5 hours.

What is the timeline for selection?

Applications are now open until 14 October 2020, 23:59 (CEST).

Once the Call for Proposals is closed, the selection process is made of two steps: 

  1. All proposals are reviewed for a  preliminary selection and the shortlisted teams are invited to present their project at a Selection Workshop held at ESA-ESTEC from 24 to 27 November 2020.
  2. The selection workshop consists of lectures given by experts and presentations of the proposed experiments by the teams. After the students’ presentations, a panel of experts will ask questions and make comments. The selected teams will be informed shortly after the Selection Workshop.

A training week is provided at the end of January 2021, with the BEXUS balloon launch planned for October 2021 and the REXUS rocket launch campaign in March 2022.

A more detailed timeline can be found here.


How to get started?

In order to prepare a consistent proposal for this exciting but demanding programme, follow the below steps:

  • Form a team with at least 4 students from different relevant backgrounds who are eligible for sponsorship;
  • Explore the REXUS/BEXUS website to learn more about the platforms and requirements found in the user manuals;
  • Have a look at the previous experiments classified by area of investigation such as: atmospheric measurements, microgravity investigations, technology demonstrations for future space missions, and even biological sciences;
  • Propose an innovative and feasible experiment and justify the need of the platform (REXUS or BEXUS).


Craig Orrock

Craig is an undergraduate Mechanical Engineering student at the University of Heriot-Watt.

Something Wrong?

Are we missing something or spouting nonsense? Let us know!

This site is a work in progress and we're always looking to improve it.

To get in touch, visit our contact us page.