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High levels of black carbon & Ozone due to forest fires turn Uttarakhand’s air lethal
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By Friday, black carbon levels had gone from about 1,000-2,000 microgram per cubic metre last month, before the fires started, to 10,000-12,000 microgram per cubic metre of air.
While forest fires always blaze through Uttarakhand around this time of the year, the scale of destruction this time around has been much larger.
(This story originally appeared in on Apr 10, 2021)For days now the forests of Uttarakhand have been on fire, turning the air over the pristine hill state lethal. Levels of black carbon, or soot, have shot up six times while that of ozone has trebled both going straight from safe levels to dangerously toxic ones within perhaps a week.
A group of
astronomers have discovered a dozen quasars that have been warped by a naturally occurring cosmic lens and split into four similar images.
Quasars are extremely luminous cores of distant galaxies that are powered by supermassive black holes. This rare discovery increases the number of known quasars or quads by about 25 per cent and can help determine the expansion rate of the universe and help address other mysteries. Quadruply imaged quasars are rare, and the first quadruple image was discovered in 1985.
Over the past four decades, astronomers had found about fifty of these quadruply imaged quasars or quads for short, which occur when the gravity of a massive galaxy that happens to sit in front of a quasar splits its single image into four, the Department of Science and Technology (DST) said.
Astronomers discover dozen quasars warped by naturally occurring cosmic lens
Astronomers discover dozen quasars warped by naturally occurring cosmic lens
A group of astronomers have discovered a dozen quasars that have been warped by a naturally occurring cosmic lens and split into four similar images.
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UPDATED: April 9, 2021 05:45 IST
Quadruply imaged quasars are rare, and the first quadruple image was discovered in 1985. (Twitter/@esascience)
A group of astronomers have discovered a dozen quasars that have been warped by a naturally occurring cosmic lens and split into four similar images.
Quasars are extremely luminous cores of distant galaxies that are powered by supermassive black holes.
Forest fires turn Uttarakhand air lethal | India News indiatimes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from indiatimes.com Daily Mail and Mail on Sunday newspapers.