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Are you ready to flirt with the edge of space?

Plane Light Propeller Propeller Front Avion 3D

Always aiming higher!

First flight using the space suit! Despite very little sunlight, SolarStratos is back in the air and flying with Raphaël […]

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HB-SXA is back in the air!

In the early morning, the project is moving forward. We are proud to announce that SolarStratos has resumed its flight […]

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Longines joins the adventure and becomes Main Partner!

New Main Partner Longines and SolarStratos are proud to announce a new alliance that names Longines Main Partner and Official […]

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Plane Light Propeller Propeller Front Avion 3D

The challenge

Travelling to the edge of the planet using only renewable energy

The aim is to protect our planet’s climate from greenhouse gases by demonstrating that concepts and projects that seemed inconceivable a short time ago are now possible with the technologies available today.

The plane

Stratospheric solar airplane

The plane

A team of passionate and highly specialised people

Multi-skilling is a must in such an experimental project. The team consists of a mix of aeronautical engineers, pilots, builders and others.


SolarStratos is supported by numerous Swiss companies

The team aims to be international, but is committed to its national roots.

Be part of it

Experience this 21st century eco-exploration

By becoming a member of the “SolarStratos” club, you help promote and support our challenge.