Scientists discover brightest 'space laser' in distant universe

Astrophysicists have identified the most distant and luminous "space laser" ever recorded, originating from a monumental galactic collision approximately 8 billion light-years away.

This phenomenon, technically known as a "gigamaser," was detected by the MeerKAT radio telescope in South Africa.

The discovery was made possible by a rare cosmic alignment where a foreground galaxy acted as a natural magnifying glass through gravitational lensing, curving space-time to amplify the signal as it journeyed toward Earth.

Designated HATLAS J142935.3–002836, this gigamaser is billions of times brighter than standard astrophysical masers.

It was birthed from the "unfathomable furnace" of two galaxies merging, a process that compresses gas and triggers rapid star formation. The resulting photons stimulate hydroxyl molecules, causing them to emit intense radio waves.

Thato Manamela, an astrophysicist at the University of Pretoria, noted the significance of the catch: "We are seeing the radio equivalent of a laser halfway across the Universe. Not only that, during its journey to Earth, the radio waves are further amplified by a perfectly aligned, yet unrelated foreground galaxy."

By surpassing the previous distance record of 5 billion light-years, this find offers a vital tool for tracing galactic mergers and outflows in the early universe.

Manamela added that the event effectively utilised a "radio laser passing through a cosmic telescope," creating a serendipitous moment for modern astronomy.

The research, set for publication in the Monthly Notices of the Royal Astronomical Society, underscores the power of current radio technology to peer into the deepest reaches of our cosmic history.