Forbes: Astronomers detect radio signal from distant galaxy – What it means

Astronomers using a radio telescope in India recorded the farthest radio signal from one galaxyfueling hopes that the secrets of the early universe can be revealed using existing telescope technology according to a Forbes article.

The signal came from a galaxy called SDSSJ0826+5630 located 8.8 billion light-years away. This essentially means it exists closer to the Big Bang than any other galaxy previously detected using radio astronomy, Forbes points out.

The technique they used

They used a technique called gravitational lens, a ripple in space-time that allows background objects to be greatly magnified relative to foreground objects.

Radio signals get weaker the farther a galaxy is from Earth, making it difficult to detect with today’s radio telescopes, but a new study published this week in the Monthly Notices of the Royal Astronomical Society gives hope that detecting galaxies at much greater distances from Earth may now be in close proximity.

“A galaxy emits different kinds of radio signals,” said Arnab Chakraborty, a postdoctoral researcher studying cosmology in the Department of Physics at McGill University in Montreal, Canada. “Until now, it has only been possible to pick up this particular signal from a nearby galaxy, limiting our knowledge to those galaxies closest to Earth.”

Astronomers Use Ripple In Space-Time To Capture Most Distant Signal Ever From A Galaxy https://t.co/SPXCRbDDoa pic.twitter.com/IX21VfqmrL

— Forbes Europe (@ForbesEurope) January 18, 2023

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