Stars, like our own Sun, can release huge amounts of energy during outbursts – called flares. Caused by powerful magnetic forces, these stellar flares can have a significant impact on nearby exoplanets. However, their nature and physical properties are still poorly understood, as stellar ultraviolet (UV) data is currently very sparse.
Addressing this challenge, Mauve marks a transformative milestone in European space science as the continent’s first dedicated satellite mission to study those stellar flares and their influence on the habitability of exoplanets.
Supported by Horizon Europe and managed by HaDEA, the project brings together leading European partners, including Blue Skies Space (UK/IT), C3S (HU), ISISPACE (NL) and the University of Kent (UK) – exemplifying Europe’s unique capacity for space science innovation and collaboration.
State-of-the-art science satellite
The Mauve satellite will operate in low-Earth orbit (LEO), maximising opportunities for science observations along the ecliptic plane. It will consist of a 16U CubeSat, hosting a 13 cm telescope that will observe hundreds of stars in the UV and visible wavelengths.
The satellite also features a state-of-the-art Advanced Attitude Determination and Control System (ADCS). This advanced instrument enables ultra-precise pointing and stability, which is critical for capturing high-quality observations of distant stars and their planetary systems.
A commercial approach to space science
Mauve is also pioneering a new model for data access, making its high-value scientific data available to the global research community through a subscription-based platform. Using an innovative data portal, this novel approach seeks to significantly accelerate international collaboration and democratise access to space-based research.
The mission’s valuable data will help scientists understand the impact of powerful stellar flares on exoplanet atmospheres and the potential of harbouring life.
Swift journey from lab to orbit
Mauve aims to set a new standard for rapid, collaborative, and accessible space missions, using a high-heritage approach for design and component selection, usually associated with commercial satellites. Its use of off-the-shelf components and its rapid development timeline – less than three years from concept to launch – illustrate a remarkable shift in the delivery of science satellites.
Reaching a key milestone, Mauve’s assembly and integration were completed on schedule in June 2025. The satellite also underwent a successful environmental testing phase, which included thermal vacuum chamber testing, vibration testing and electromagnetic compatibility (EMC) tests. The satellite is currently scheduled to launch in October 2025.
Small satellite, big impact
Mauve is demonstrating how small satellites can make big impact in the field of space science. By unlocking new insights into the environments of distant worlds, the mission is acting as catalyst for scientific progress, shaping the future of space exploration and planetary science.
Mauve will soon begin delivering thousands of hours of unique spectroscopic data. This will enable astronomers worldwide to explore the dynamics of stellar flares, magnetic activity, and their effects on exoplanet atmospheres — key factors in the search for life beyond Earth.
Driven by EU funding and supported also by the UK Research and Innovation (UKRI)’s Horizon Europe Guarantee scheme, Mauve demonstrates powerfully that scientific excellence knows no borders.
Background
Horizon Europe – Space Research Call 2025
With a total budget of €139 million, the Horizon Europe Space Research call 2025 offers a variety of exciting collaboration opportunities for the space community. The call closes on 25 September 2025. Discover all topics in this article.
