Image: The sun in 2019

The changing activity of our sun as seen by ESA's Proba-2 satellite in 2019.

Building code debate heats up as Australia swelters

In the wake of Australia sweltering through its hottest two months on record – December and January –University of South Australia academics are calling for urgent changes to the country's building codes.

A guide to hunting zombie stars

Apparently not all supernovas work. And when they fail, they leave behind a half-chewed remnant, still burning from leftover heat but otherwise lifeless: a zombie star. Astronomers aren't sure how many of these should-be-dead ...

Nasa's Rossi X-ray Timing Explorer leaves scientific legacy

NASA's decommissioned Rossi X-ray Timing Explorer (RXTE) satellite re-entered Earth's atmosphere on April 30. Orbiting for more than 22 years, the 6,700-pound satellite operated from 1996 to 2012, providing scientists with ...

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