Aalto-1 was a Finnish research nanosatellite, created by students of Aalto University.

[3][4] The Aalto-1 project began in 2010 with a feasibility study, which was conducted as part of a university course on space technology.

[5] In all, over 80 students of Aalto University's School of Electrical Engineering were involved in the project.

[6] The solar-powered CubeSat – based satellite weighed approximately 4 kg (8.8 lb),[5] and had 3 main payloads: a miniature Fabry-Pérot spectrometer, designed by VTT Technical Research Centre,[7] a RADMON-radiation detector developed by University of Helsinki and University of Turku for the study of solar wind conditions in the Earth orbit (and to study the radiation environment in general), and an electric sail (dubbed a "brake tether"), which was designed for an atmospheric entry at the end of its 2-year operational lifespan,[8] with the intent of avoiding the creation of space junk.

An approximate copy of Suomi 100 satellite was built in September-October 2017 in a lorry that toured Finland.