The Very Large Telescope (VLT), located in Chile, has been upgraded with a new instrument called Moons (Multi-Object Optical and Near-infrared Spectrograph), which is now conducting its first observations. Moons is the largest spectrograph in Europe and weighs about 10 tons, standing nearly 4.5 meters tall. It was developed by a team from the Paris Observatory - PSL and the French National Center for Scientific Research (CNRS) as part of an international collaboration that spanned over 14 years. The instrument is mounted on one of the VLT’s 8-meter telescopes and includes a circular structure with around 1,000 optical fibers. These fibers can be directed precisely at different celestial objects within the telescope’s view, capturing their light and sending it to spectrographs at the instrument’s rear. Moons is designed to study up to 1,000 objects at the same time, focusing especially on the red light part of the visible spectrum and the infrared range. This is particularly useful for observing regions of the universe that are hidden from view in visible light, such as the center of the Milky Way, where dense clouds of dust block the view. It will also help astronomers study how distant galaxies formed. The European Southern Observatory (ESO) mentioned that the Gaia mission, which mapped the positions and movements of over a billion stars in the Milky Way, has suggested that a major cosmic event reshaped the galaxy around 10 billion years ago. Michele Cirasuolo, the scientist in charge of Moons and head of the ESO instrumentation program, described the first light captured by Moons as a "truly moving moment." He praised the instrument as a remarkable achievement, saying it was made possible by the dedication and talent of the team involved. Cirasuolo noted that Moons provides a new way to explore the universe, allowing researchers to study the physical, chemical, and dynamic properties of millions of stars and galaxies across more than 13 billion years of cosmic history. The installation of Moons marks a significant step forward in astronomical research, offering new opportunities to understand the evolution of the universe and the processes that shaped it. Scientists are eager to use this powerful tool to uncover new cosmic phenomena and expand our knowledge of the universe’s origins and structure.