Operations Rehearsal 4 (OpR4) has now concluded, marking a major milestone towards routine survey operations! Image: Automatically generated and queued OBs during OpR4 (Credit: Jakob Walcher) #4MOST #astronomy #astrophysics

After a successful commissioning process, 4MOST has reached the next major milestone before the full survey begins: Operations Rehearsal 4 (OpR4) ✨ Image: Carlos la Fuente launching the first observation for OpR4 (Credit: Jakob Walcher) #4MOST #astronomy #astrophysics

We are delighted to share that Dr Lara Cullinane has been awarded a prestigious Leibniz Junior Research Group based at the Leibniz Institute for Astrophysics Potsdam (@aippotsdam.bsky.social). Image Credit: AIP/Spikermann #4MOST #astronomy #astrophysics

4MOST - Ein neuer Blick ins All. Matthias Steinmetz ( @galacticrave.bsky.social ) von @aippotsdam.bsky.social & @unipotsdam.bsky.social zu Gast bei #TonspurWissen, dem #Podcast von @leibniz-gemeinschaft.de & Rheinischer Post. 👁️🔭🌟 pod.fo/e/364503 #Astrophysik #Astronomie #4MOST @4most-eu.bsky.social

Join Jessica Pilling from the University of Sussex for a day in her life commissioning the 4MOST instrument! Credit: J. Pilling #4MOST #astronomy #astrophysics #telescope #observatory 1. Arrival at Paranal observatory 🔭

Commissioning is well underway at 4MOST! Sam Philipsborn, a PhD student from the University of Sussex, is one of the team members working tirelessly to ensure that 4MOST is performing as expected. Image Credit: S. Philipsborn #4MOST #astronomy #astrophysics #telescope #observatory

Check out this amazing video from Chris Pattison (@cosmochris.bsky.social) describing 4MOST and our First Light observations! #4MOST #astronomy #astrophysics #telescope #observatory

The Telescope That Sees 18,000 Colours

YouTube video by Chris Pattison

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Meet the team commissioning 4MOST! Over the next two months, they’ll observe thousands of targets to study how the instrument performs and ensure it meets expectations ahead of full science operations. #4MOST #astronomy #astrophysics #telescope #observatory

4MOST in motion! Mounted on ESO’s VISTA telescope in Chile, this wide-field, fibre-fed spectroscopic facility can observe over 2000 targets at once, capturing their light and splitting it into spectra for analysis. Video: AIP/A. Saviauk Audio: LofCosmos #4MOST #astronomy #astrophysics

Congratulations to @4most-eu.bsky.social which has achieved First Light, splitting the light into 18,000 spellbinding colour components. 🎉 Read more about this multi-tasking telescope, which will collect the largest ever spectroscopic sample of supernovae. 🔭 tinyurl.com/2wnw86zd

Portsmouth and Southampton scientists help secure the first capture of light in all its colours from cosmic objects

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When light from a star or galaxy enters one of 4MOST’s 2400 fibres, it is split into its colours and dispersed across the detectors, creating a spectrum, a detailed record of brightness versus wavelength. Credit: AIP/R. de Jong, CRAL/J.-K. Krogager #4MOST #astronomy #astrophysics

Meet the team! Image Credit: M. Gammel #4MOST #astronomy #astrophysics

Revolutionary new space telescope @4most-eu.bsky.social has captured its first data from the universe. Our scientists are part of the team behind the super-scope and say it’ll reveal how galaxies and black holes formed. Read more 👉 tr.ee/ba4NEs

Our PI, Roelof de Jong, reflects on 15 years of dedication, collaboration, and discovery leading to 4MOST First Light. Image Credit: R. de Jong #4MOST #Astronomy

1/ The 4MOST instrument installed on our VISTA telescope in Chile completed its first test observations. @4most-eu.bsky.social will help us unravel our galactic history, explore dark matter, and more. www.eso.org/public/annou... 🔭 🧪 #instrumentation 📷 AIP/A. Saviauk

First light for 4MOST! 🔭 Global telescope collaboration @4most-eu.bsky.social captures its first light, beginning a scientific journey to reveal how galaxies and stars form and evolve. Discover Durham’s role in this project 👉 www.durham.ac.uk/news-events/... @icc-durham.bsky.social

New Telescope Captures First Light in Chile - Durham University

durham.ac.uk

A new telescope facility is born 🌟, #4MOST captured its first starlight 💫 An impressive example of international cooperation. 4MOST can analyse the light from 2,400 objects simultaneously in 18,000 colours. www.aip.de/news/4most-f... @eso.org @4most-eu.bsky.social @aippotsdam.bsky.social

🤩The @4most-eu.bsky.social (#4MOST) facility on @eso.org VISTA telescope in Chile achieved first light. #MPE scientists played a leading role in developing the Operations System, enabling to link #eROSITA’s X-ray universe with large-scale structure of galaxies. ➡️ More: www.mpe.mpg.de/8102833/news...

4MOST Begins its Journey of Cosmic Discovery

4MOST embarks on a cosmic journey, capturing spectra of thousands of celestial objects simultaneously, unlocking secrets of the universe.

mpe.mpg.de

First Light for 4MOST! The 4-metre Multi-Object Spectroscopic Telescope (4MOST) has captured its very first spectra! Video Credit: AIP/R. de Jong, AIP/K. Riebe, AIP/A. Saviauk, CRAL/J.-K. Krogager

First Light for 4MOST!

YouTube video by 4-meter Multi-Object Spectroscopic Telescope

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Sneak peek time! 👀 Each dot in this image is a target star or galaxy that will be captured in our First Light! Soon, each of these dots will turn into spectra, revealing the chemical signature of each of these objects! Image Credit: R. de Jong #4MOST #astronomy #telescope #observatory #science

The glasses aren’t raised just yet… but they’re standing by. Preparations for 4MOST First Light are in full swing, and the team on the mountain clearly have everything ready for the big day! 🥂 📷: R. de Jong #4MOST #telescope #astronomy #astrophysics #science #observatory

The road has been winding, but the destination is now in sight! 4MOST is almost at first light! Stay tuned 👀 📷: F. Laurent #4MOST #telescope #astronomy #astrophysics #science #observatory

3/3: The nine 4MOST Extragalactic Community Surveys explore the Universe beyond the Milky Way. Together they will probe galaxy evolution, the baryon cycle, strong lensing, quasar feedback, and the large-scale structure of the cosmos! 📷: A. Saviauk/AIP #WorldSpaceWeek #4MOST #extragalactic

2/3: The nine 4MOST Extragalactic Community Surveys explore the Universe beyond the Milky Way. Together they will probe galaxy evolution, the baryon cycle, strong lensing, quasar feedback, and the large-scale structure of the cosmos! 📷: A. Saviauk/AIP #WorldSpaceWeek #4MOST #extragalactic

1/3: The nine 4MOST Extragalactic Community Surveys explore the Universe beyond the Milky Way. Together they will probe galaxy evolution, the baryon cycle, strong lensing, quasar feedback, and the large-scale structure of the cosmos! 📷: A. Saviauk/AIP #WorldSpaceWeek #4MOST #extragalactic

2/2: The 4MOST Galactic Community Surveys tackle some of the biggest questions in stellar and galactic astrophysics. From newborn stars to ancient remnants, these surveys will measure ages, motions and chemistry across all components of our galaxy! 📷: A Saviauk/AIP #WorldSpaceWeek #4MOST #milkyway

1/2: The 4MOST Galactic Community Surveys tackle some of the biggest questions in stellar and galactic astrophysics. From newborn stars to ancient remnants, these surveys will measure ages, motions and chemistry across all components of our galaxy! 📷: A Saviauk/AIP #WorldSpaceWeek #4MOST #milkyway

✨Studying the changing universe✨ From exploding stars to supermassive black holes, TiDES will capture transients and their host galaxies to map cosmic evolution! 📷: A. Saviauk/AIP #WorldSpaceWeek #4MOST #extragalactic #telescope #astronomy #astrophysics #science #observatory

✨1001MC: Unlocking the Magellanic Clouds✨ 1001MC will map the history and interactions of our closest neighbours with high-quality spectra! 📷: A. Saviauk/AIP #WorldSpaceWeek #4MOST #magellanicclouds #extragalactic #telescope #astronomy #astrophysics #science #observatory

✨Mapping clustering from the nearby to distant universe✨ The Cosmology Redshift Survey will trace cosmic structure using 8 million galaxies and quasars! 📷: A. Saviauk/AIP #WorldSpaceWeek #4MOST #extragalactic #telescope #astronomy #astrophysics #science #observatory