So many stars, so little time: Machine learning helps astroboffins spot the most oxygen-starved galaxy yet


HSC J1631+4426

Astronomers have spied a tiny galaxy with the lowest oxygen levels yet observed, a discovery made possible thanks to a machine-learning algorithm.

The galaxy, dubbed HSC J1631+4426, contains just 1.6 per cent of the total amount of oxygen locked in our Sun – the lowest levels yet seen, beating the previous record by just a smidgen. These extremely metal-poor galaxies are rare; they tend to be small, formless dwarf galaxies that contain a small smattering of stars.

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