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Advanced Telescope for High Energy Astrophysics

Spacecraft
Advanced Telescope for High-ENergy Astrophysics is an X-ray observatory mission selected by European Space Agency within its Cosmic Vision program to address the Hot and Energetic Universe scientific theme. Wikipedia
Launch date: 2035
Contractor: Arianespace
Focal length: 12 m (39 ft)
Mission duration: 4 years (planned)
Reference system: L2 point (baseline)