Levitating Graphite Web Captures the Moon's Embrace ✦
Original: "Detection of the Earth Tides by Diamagnetic Levitation"
A tiny levitating graphite gravimeter senses the tidal forces of the Moon and Sun, paving the way for mobile gravity survey networks.
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A graphite petal hovers in a magnetic cradle, catching the tidal waltz of the Moon and Sun. Softer than a spiderweb, it dances under a laser beam. Soon, a swarm of these sensors will rise into the sky on drones, cast an invisible net around volcanoes, and start tracking dark matter, listening for the whisper of the Big Bang.
🎯 The graphite flake above the magnets is an ultrasoft spring: its vertical stiffness is 31 millinewtons per meter — 50 times weaker than spider silk.
🎬 In Arthur C. Clarke’s novel 'A Fall of Moondust', instruments search for hidden structures via gravity anomalies — and LOMS brings that fiction to life.
a_q = (2\pi f_{n,q})^2 q
Acceleration along the q-axis is proportional to the square of the resonance frequency and the displacement.
S^{1/2}_{a,th} = \sqrt{\frac{4 k_B T k_q}{m^2 \omega_{n,q} Q_q}}
Spectral density of acceleration noise caused by thermal fluctuations.
Scientists
Alan GuthAndrei LindeGeorges LemaîtreJames PeeblesAdam RiessBrian Schmidtgravitational waves
spacetime curvature
dark matter
spectroscopy
LIGO
pulsar
supernova
black hole
big bangLaws
Friedmann equationsHubble's lawDoppler effectHawking radiationgravitational lensingBekenstein-Hawking entropy