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Articles on Radio astronomy

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An artist’s impression of the Double Pulsar system in which the two pulsars orbit each other every 2.5 hours and send out high-energy beams that sweep across the sky. Image credit: John Rowe Animations/CSIRO

We counted 20 billion ticks of an extreme galactic clock to give Einstein’s theory of gravity its toughest test yet

Astronomers watched a pair of pulsars for 16 years to test the theory of general relativity, which has stood unchallenged for over a century.
Some of the dishes that make up the Square Kilometre Array’s radio telescope system. This kind of “blue skies” research can have great real-world value. MUJAHID SAFODIEN/AFP via Getty Images

COVID-19 budget pressures threaten curiosity-driven science. That’s a bad thing

The pandemic has underscored that the world requires agility for survival. That makes blue skies science, which encourages curiosity and nimble thinking, perhaps more important than ever.
The two giant radio galaxies found with the MeerKAT telescope. In the background is the sky as seen in optical light. Overlaid in red is the radio light from the enormous radio galaxies, as seen by MeerKAT. I. Heywood (Oxford/Rhodes/SARAO)

Discovery of two new giant radio galaxies offers fresh insights into the universe

Based on what we currently know about the density of giant radio galaxies in the sky, the probability of finding two of them in this region is extremely small.
Artist’s depiction of a flare-coronal mass ejection event on Proxima Centauri. Mark Myers, ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav)

Bad space weather may make life impossible near Proxima Centauri

We observed a powerful flare and a huge burst of radio waves from our nearest stellar neighbour, Proxima Centauri, indicating violent space weather around the star.

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