Eye on the sky: the four 23 m-diameter telescopes belong to the Large-Sized Telescope array at the Roque de los Muchachos Observatory in La Palma, Spain. (Courtesy: LST collaboration)

Some 250 scientists and officials have attended a ceremony today to mark the completion of a giant telescope complex in La Palma, Spain .

The construction of four 23 m-diameter telescopes belong to the Large-Sized Telescope (LST) array at the Roque de los Muchachos Observatory in La Palma, Spain.

The telescopes are designed to detect the faint Cherenkov light flashes when very high-energy gamma rays interact with the Earth’s atmosphere.

The LSTs are the most sensitive instruments in the world for observing gamma rays at energies between approximately 20 GeV and 3 TeV.

The first LST-1 telescope was built in 2020 and has already completed observations of pulsars, studies of active galactic nuclei at cosmological distances and rapid follow-up observations of transient phenomena such as novae and gamma-ray bursts.

The three…