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The inaugural James Webb Space Telescope image has opened a new chapter of cosmic exploration, but astronomers say the observatory’s most important discoveries may be ones they haven’t yet imagined. Distant colliding galaxies, gas-giant exoplanets, and dying star systems were the first celestial subjects to be captured by a billion-dollar observatory, putting their various infrared imaging capabilities on a colorful display and proving that the telescope works as designed. Webb’s gallery of early photographs and spectrographic data, which astronomers liken to a mere “target practice” as they prepare telescopes for operational science, also showcases some of the areas of investigation planned for the future. The competitively selected research agenda includes exploring the evolution of early galaxies, stellar life cycles, the search for habitable planets orbiting distant suns, and the composition of moons in our own outer solar system. But Webb’s most revolutionary find, 100 times more

Rapid Antigen Test. How soon can you get covid again? Experts now say 28 days – but you can protect yourself, writes doctor ASHWIN SWAMINATHAN. My extraordinary two-and-a-half year negative covid test came to a halt last week, after receiving a text confirming I was among the latest pandemic catches. My case adds to the tilt of the third Omicron wave in seven months, currently rolling across Australia. Shivering through my light fights, I optimistically thought that I would at least get a few months reprieve from the precautionary measures and isolation testing. But emerging evidence suggests the possibility of reinfection in a shorter timeframe for the newer subvariants. Experts have reduced the window of protection from previous infections from 12 weeks to 28 days. This week, the NSW Western Australia government and the ACT all announced those with previous COVID-19 need to get tested after 28 days if they develop symptoms. If positive, they will be treated as new cases. Re-infe