Welcome to STEP

STEP (STars and ExoPlanets) is a Danish astronomical satellite mission bringing together researchers and industry to explore the ultraviolet universe. STEP will operate from low-Earth orbit to answer fundamental questions about stars and exoplanets.

STEP Satellite Render

About the Mission

STEP is equipped with a 25 cm telescope and a highly sensitive ultraviolet camera. Using this, it will follow up on discoveries from major ESA and NASA missions like Kepler, TESS, Plato, and ARIEL. The mission will:

  • Perform UV imaging of stars and exoplanetary systems
  • Obtain high-cadence time-series photometry
  • Advance our understanding of stellar variability

Part of its observing time is dedicated to outreach and education, aiming to spark public interest in space science.

Mission News

No news posted yet. Check again later!

What's to come

This website will be the central hub for all things related to the STEP mission, from preparing observations and obtaining data, to operators monitoring and controlling the satellite.

  • Observation planning tools
  • Data access interface
  • Mission and data Documentation
  • Real-time mission status and telemetry
  • Pages for preparing and submitting observation requests