4MOST

4-metre Multi-Object Spectroscopic Telescope

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Gallery - 2025

2025 Naples STM Clear

Science Team Meeting 2025, Naples

Science Team Meeting 2025, Naples

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Project Culture

4MOST has a Code of Conduct, Ombudspersons, and a Project Culture Working Group.

News

Reflections on OpR4: A Successful Rehearsal for 4MOST Operations 2026-03-02

4MOST Milestone: Commissioning Success and OpR4 beginnings 2026-01-28

Congratulations to Dr Lara Cullinane! 2025-12-16

4MOST Milestone: 4MOST Captures First Light 2025-10-21

Countdown to 4MOST First Light 2025-10-14

4MOST Milestone: AIV Completion - Beginning of Systems Verification 2025-09-25

4MOST Social Media Launch 2025-09-18

4MOST installation on VISTA 2025-09-12

ESO Picture of the Week: Fantastic 4MOST 2025-07-23

4MOST Milestone: Second Major Shipment to Chile 2025-06-18

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The 4MOST consortium consists of 17 institutes in Germany, Australia, France, the Netherlands, Sweden, Switzerland, and the UK, under leadership of the Leibniz-Institut für Astrophysik Potsdam (AIP).

The 4MOST consortium has a Code of Conduct, Ombudspersons, and a Project Culture Working Group.

4MOST is a wide-field, high-multiplex, fibre-fed, optical spectroscopic survey facility mounted on the 4-m-class telescope VISTA at the Paranal Observatory of the European Southern Observatory (ESO) in Chile. It is entirely dedicated to observations for ESO Public Surveys.

The data will be available at public data archives hosted by AIP and ESO.

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