Daniela Breitman

Retraction to: Nature https://doi.org/10.1038/s41586-022-04841-8 Published online 13 July 2022 The authors have retracted this article after identifying a crucial error: due to an unusual calibration problem, CHIME’s digital beams were incorrectly pointed when FRB 20191221A was detected. The sub-second periodicity that they associated with the putative fast radio burst FRB 20191221A was, in reality, a periodic signal from the known Galactic pulsar PSR J0248 + 6021.

Abstract Fast radio bursts (FRBs) are millisecond-duration radio transients whose origins remain unknown. As the vast majority of bursts are one-off events, it is necessary to pinpoint FRBs precisely within their host galaxies at the time of detection. Here we use two purpose-built outrigger telescopes to localize FRB 20210603A at the time of its detection by the Canadian Hydrogen Intensity Mapping Experiment (CHIME).

Human World Happy birthday to Italian astronomer, mathematician and physicist Galileo Galilei, born on February 15, 1564. Galileo was one of the first to aim a telescope at the night sky, where he saw phases of Venus and four dots of light orbiting Jupiter (now known as Jupiter’s famous Galilean moons). These and other observations began to change the way we saw the universe and our place in it. Galileo vs.