Moon Bell: A New Way to Catch Gravitational Waves ⚡ экспресс
A lunar gravitational-wave detector: the quiet Moon resonates like a bell, amplifying signals from space. The LILA project uses lasers to hear black hole mergers and supernova explosions. The first phase is already sensitive enough, and the second will reach the edge of the observable universe. What whispers will the Moon carry to us?
Gravitational waves are ripples in space-time, predicted by Einstein over a century ago. Earth-based detectors catch them with lasers, but are blind to low frequencies: hampered by the trembling of the Earth's crust and the thermal jitter of mirrors. The Moon is the perfect listener: no wind, no oceans, no tectonics. A passing low-frequency gravitational wave makes the Moon ring like a bell. The LILA mission will install laser sensors to capture this ringing.
LILA Pioneer will register mergers of black holes and neutron stars at frequencies from millihertz to decihertz. LILA Horizon will reach the edge of the visible Universe—to where the first galaxies were born. This is how we'll hear the echo of the expansion of the Universe. A half-century-old idea gains cosmic scale.
🎯 In the 1960s, [scientist:Joseph Weber]Joseph Weber[/scientist] built the first detector—an aluminum cylinder bell. Today, we've turned the whole Moon into a bell.