Astronomy Today@astronomytodayAstronomers may have found a neutron star that is heavier than expected. It can't be seen directly, but its pull makes a red giant in a binary system sway back and forth. The system lies thousands of light-years away in the Pisces constellation.
Researchers from several Chinese universities and observatories used data from LAMOST, APOGEE and the retired Gaia space observatory to study it. They estimate the hidden object weighs about 2.2 times the mass of the sun, with a range of 1.8 to 2.8, while most neutron stars are around 1.4.
It's still unclear where the extra mass came from.
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