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Gujarati scientist discovers a black hole that shouldn’t exist – Jagran English

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The intermediate black hole weighing about 142 times the mass of the sun was formed after two black holes weighing about 66 and 85 solar mass merged about seven billion years ago. The ripple produced in space due to the collision travelled across the cosmos at the speed of light and were captured by detectors LIGO and Virgo on May 21, 2019.

Publish Date: Sat, 05 Sep 2020 01:53 PM IST

New Delhi | Jagran Trending Desk: A team of scientists led by Dr. Karan Jani, an astrophysicist from Vadodara who is settled in the United States, has discovered an intermediate black hole that challenges our current understanding of the universe.

The intermediate black hole weighing about 142 times the mass of the sun was formed after two black holes weighing about 66 and 85 solar mass merged about seven billion years ago. The ripple produced in space due to the collision travelled across the cosmos at the speed of light and were captured by detectors LIGO and Virgo on May 21, 2019. Jani and his team announced the discovery on Wednesday evening (IST).

“This discovery will not just change the way we study the universe but also understand its complexities further,” Jani told The Times of India. “In astronomy, it has always been believed that black holes are formed due to gravitational collapse of the stars. But the black hole we discovered was not formed due to any star’s collapse or blast.”

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. Several collisions of black hole have been recorded in gravitational waves by LIGO and Virgo over the past five years. However, the collisions observed in the past involved black holes of smaller sizes and the resultant black hole didn’t grow beyond the size of typical stellar black holes. Given the sizes of the black holes involved, the latest detection may offer a clue to how supermassive blackholes at the centre of galaxies are formed.

“We always though that black holes are either less than hundred times the mass of the sun or thousands of times bigger than that. This is the first black hole of the intermediate size and it is 142 times bigger than the mass of the sun. In fact, it is older than the sun,” Jani said.

Posted By: Lakshay Raja

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Scientists find evidence of multiple underground lakes on Mars – Yahoo News Canada

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<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="Scientists believe they’ve found more evidence confirming the presence of a large reservoir of liquid water under the surface of Mars first discovered back in 2018. In fact, they believe they’ve found three more subsurface saltwater lakes surrounding that main one — a huge discovery, seeing as those lakes are potential habitats for life. As Nature notes in its post about the scientists’ paper, the first finding was met with lot of skepticism because it was only based on 29 observations from 2012 to 2015. This study and its findings were based on 134 observations made between 2012 and 2019.” data-reactid=”23″>Scientists believe they’ve found more evidence confirming the presence of a large reservoir of liquid water under the surface of Mars first discovered back in 2018. In fact, they believe they’ve found three more subsurface saltwater lakes surrounding that main one — a huge discovery, seeing as those lakes are potential habitats for life. As Nature notes in its post about the scientists’ paper, the first finding was met with lot of skepticism because it was only based on 29 observations from 2012 to 2015. This study and its findings were based on 134 observations made between 2012 and 2019.

The team used data from a radar instrument on the European Space Agency’s (ESA) Mars Express spacecraft to investigate the planet’s southern polar region. Mars Advanced Radar for Subsurface and Ionosphere Sounding or MARSIS, as the instrument is called, is capable of sending out radio waves that bounce off materials on the planet’s surface. Different materials reflect those signals differently, and the same technique is used to find subsurface glacial lakes here on Earth.

Upon observing an area that’s around 75,000 square kilometers in size, they found locations that reflected those signals back in a way that indicates the presence of water trapped underneath a kilometer of ice. The main lake, the one discovered back in 2018, measures 30 kilometers or 19 miles across, while each of the three smaller lakes surrounding it are a few kilometers across.

<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="While the scientists’ findings are promising, some experts still believe we won’t find lakes on the red planet at all. Jack Holt, a planetary scientist part of NASA’s Mars Reconnaissance Orbiter program, doesn’t believe there’s enough heat flow under the surface of the planet for water to remain liquid. And even if we do find liquid water under Martian ice, that won’t automatically mean we’ll also find life. See, the lakes have to be very salty to remain liquid, but their salt content must not exceed five times that of seawater to be able to support life. As John Priscu, an environmental scientist at Montana State University, told Nature:” data-reactid=”27″>While the scientists’ findings are promising, some experts still believe we won’t find lakes on the red planet at all. Jack Holt, a planetary scientist part of NASA’s Mars Reconnaissance Orbiter program, doesn’t believe there’s enough heat flow under the surface of the planet for water to remain liquid. And even if we do find liquid water under Martian ice, that won’t automatically mean we’ll also find life. See, the lakes have to be very salty to remain liquid, but their salt content must not exceed five times that of seawater to be able to support life. As John Priscu, an environmental scientist at Montana State University, told Nature:

“There’s not much active life in… briny pools in Antarctica. They’re just pickled. And that might be the case [on Mars].”

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'Most extreme planet discovered': Scientists find blistering exoplanet with temperatures near 3,200C – National Post

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As the study of planets outside our solar system continues, astronomers have discovered what they have described as the ‘most extreme planet’ ever observed, with surface temperatures more blistering than those of some stars.

Researchers at the University of Bern say that the exoplanet, dubbed WASP-189b, is a gaseous giant 1.6 times larger than Jupiter and can record temperatures of up to 3,200 degrees Celsius, hot enough enough to met all rocks and metal and turn them into gaseous form.

The planet, they said, orbits the star HD 133112, known to be one of the hottest stars with a planetary system 2,000 degrees Celsius hotter than our Sun.

Despite being an enormous gaseous giant, WASP-189b is situated much closer to its star than Jupiter is to the sun, and so only take 2.7 days to orbit its star, with one side experiencing a permanent ‘night’ and the other a permanent ‘day’.

“WASP-189b is especially interesting because it is a gas giant that orbits very close to its host star,” astrophysicist Monika Lendl said, according to the university’s press release. “It takes less than three days for it to circle its star, and it is 20 times closer to it than Earth is to the Sun.”

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A coronavirus ‘game changer’: Canadian company claims it can detect virus in the air – Global News

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Nova Scotia reported one new case of coronavirus on Wednesday, after it was identified the day before.

The province said the new case is in the Northern Zone and is related to travel outside of Canada. The individual has been self-isolating as required, the province said.

Two active cases of COVID-19 remain in the province as of Wednesday, with Nova Scotia Health’s labs having completed 870 Nova Scotia tests the day prior.


Click to play video 'When can Canadians expect a COVID-19 vaccine?'



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When can Canadians expect a COVID-19 vaccine?


When can Canadians expect a COVID-19 vaccine?

To date, Nova Scotia has 94,414 negative test results, 1,088 positive COVID-19 cases and 65 deaths.

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One person is currently hospitalized in ICU.

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According to the province, 1,021 cases are now considered resolved.

The province’s health officials urge anyone currently experiencing a fever or cough to visit the 811 website to see if an assessment is needed.

If anyone experiences two or more of the following symptoms, they should ask if an assessment is needed:

  • sore throat
  • runny nose
  • headache
  • shortness of breath

Click to play video 'Nova Scotia granted three-quarters of all COVID-19 exemption requests between March and July'



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Nova Scotia granted three-quarters of all COVID-19 exemption requests between March and July


Nova Scotia granted three-quarters of all COVID-19 exemption requests between March and July

© 2020 Global News, a division of Corus Entertainment Inc.

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