Here’s Why We Should Put a Gravitational Wave Observatory on the Moon

Gravitational Wave science holds great potential that scientists are eager to develop. Is a gravitational wave observatory on the Moon the way forward? NASA/Goddard/LRO.

Scientists detected the first long-predicted gravitational wave in 2015, and since then, researchers have been hungering for better detectors. But the Earth is warm and seismically noisy, and that will always limit the effectiveness of Earth-based detectors.

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A Neutron Star Merged with a Surprisingly Light Black Hole

Artwork of a neutron star–black hole merger. Credit: Carl Knox, OzGrav-Swinburne University.

Galactic collisions, meteor impacts and even stellar mergers are not uncommon events. neutron stars colliding with black holes however are a little more rare, in fact, until now, we have never observed one. The fourth LIGO-Virgo-KAGRA observing detected gravitational waves from a collision between a black hole and neutron star 650 million light years away. The black hole was tiny though with a mass between 2.5 to 4.5 times that of the Sun. 

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