Story perspectives
New Method Aims to Detect Exomoons via Astrometry
9/25/2025
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Story summary
- A new European Southern Observatory paper proposes using astrometry to detect exomoons by measuring planetary wobble.
- The method faces challenges because the signals are extremely small.
- GRAVITY can detect wobbles down to 50 microarcseconds.
- PLANETES aims for 10 microarcseconds.
- PLANETES will be tested on ? Pictoris b later this decade.
