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Hundreds of great white sharks spotted along Nova Scotia coast, some as long as over five metres: Marine expert – Wetaskiwin Times Advertiser

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As part of an expedition to track shark movements in Maritime waters, researchers discovered Nukumi, believed to weigh 1.606 kg and be over 50-years-old

OCEARCH has tagged their largest-ever great white shark off the Maritime coast and named her after a legendary Mi’kmaw grandmother figure.

As part of an expedition down the Northwest Atlantic coast to track the shark population, the U.S. based shark research non-profit, say they tagged Nukumi (pronounced noo-goo-mee) on Friday morning near West Ironbound Island in Nova Scotia.

Chris Fischer, founding chairman and expedition leader of OCEARCH, said finding a shark of Nukumi’s size is “interesting.” The shark measured at over five metres long, weighed 1,606 kg and is assumed to be over 50 years old.

“She actually is likely a proper grandmother,” Fischer told CBC News.

Several Canadians boating in the Maritime waters or relaxing by the beach have reported an increase in sightings of great white sharks along the coast, with videos of the apex predators popping up along the Nova Scotian coast during the summer. In August, authorities temporarily closed down Queensland beach for a couple of days after several beachgoers spotted the trademark shark fin perilously close to the shore.

However, Fischer says its not as uncommon as one may think to spot more sharks off the Nova Scotia coast. “The reality is that we suspect they’ve been here for quite some time, we just know about them now,” he said, as quoted in a recent organization press release.

In 2018 and 2019, Fischer led two expeditions off the Nova Scotia coast to tag and sample sharks, so as to track their movements. The team was able to tag 17 sharks and shared their tracking data on their website and social media, increasing public awareness about the creatures and their prevalence in the Maritimes. Several of the tagged sharks have returned to the Nova Scotia coast this year, according to the press release, stemming researcher’s curiosity as to what attracts the fish back and why.

“Now that we know they are here in big numbers, it’s time to drill down and understand exactly how these animals are utilizing the area and how healthy the population is,” Fischer added. According to the press release, the presence of so many predators off Canada is a sign of a “healthy ocean” as the sharks act as balance-keepers within the waters.

The organization’s third expedition, began earlier this month at Main-a-dieu and travelled to shark friendly locations such as Scaterie Island and West IronBound Island before ending near Lunenburg on Oct. 6. During the trip, researchers will extract bacteria samples from the shark’s mouths as well and blood and fluid samples to study the health and behaviour of the white shark population, as well tag more sharks to track their movements. The data will be used to support 21 other ongoing research projects to study the reclusive predators.

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NASA astronaut Kate Rubins votes from ISS: 'If we can do it from space…' – CNET

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This story is part of Elections 2020, CNET’s coverage of the run-up to voting in November.

However you go about casting your vote, you have to admire this NASA astronaut who managed to cast her vote from space. Kate Rubins, who’s currently on duty aboard the International Space Station, posted a photo of herself in front of a padded booth marked “ISS Voting Booth,” with the text “From the International Space Station: I voted today.”

NASA notes this isn’t Rubins’ first time voting from space. She did so in 2016, when she was also on the ISS. 

“I think it’s really important for everybody to vote,” Rubins said in a video uploaded by NASA. “And if we can do it from space, then I believe folks can do it from the ground, too.” Rubins’ six-month ISS mission began Oct. 14, which was also her 42nd birthday.

Most astronauts choose to vote as Texas residents because they move to Houston for training, NASA said, though, that those who wish to vote as residents of their home state can make special arrangements. 

Ballots from the county where the astronaut is registered are tested on a space station training computer, then the real ballot is generated and uplinked to the ISS with crew-member-specific credentials to keep it secure. The completed ballot is electronically delivered back to Earth to be officially recorded.

“Voting in space has been possible since 1997 when a bill passed to legally allow voting from space in Texas,” NASA said in a statement. “Since then, several NASA astronauts have exercised this civic duty from orbit. As NASA works toward sending astronauts to the Moon in 2024 and eventually on to Mars, the agency plans to continue to ensure astronauts who want to vote in space are able to, no matter where in the solar system they may be.”

NASA had expected the US astronauts on the SpaceX Crew-1 mission to the ISS to join Rubins in voting from space, but their mission has been delayed until early- to mid-November, so they can now vote from Earth.


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– AI and photonics to decipher the “twinkling” of the stars… – AlKhaleej Today

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23 October 2020

The invention of Australian scientists paves the way for a “renaissance in exoplanet observation”.

Australian scientists have developed a new type of sensor to measure and correct the distortion of starlight caused by viewing the Earth’s atmosphere. This should make it easier to examine the possibility of life on distant planets.

With the help of artificial intelligence and machine learning, optical scientists at the University of Sydney have developed a sensor that can neutralize the “twinkle” of a star caused by thermal fluctuations in the Earth’s atmosphere. This will facilitate the discovery and study of planets in distant solar systems with optical telescopes on Earth.

“The main method of identifying planets orbiting distant stars is to measure regular breaks in starlight caused by planets blocking parts of their sun,” said lead author Dr. Barnaby Norris.

“It’s very difficult from the ground, so we had to develop a new way of looking at the stars. We also wanted to find a way to observe these planets directly from Earth, ”he said.

The team’s invention is now being used in one of the largest optical telescopes in the world, the 8.2-meter Subaru telescope in Hawaii operated by the National Astronomical Observatory of Japan.

“It is really difficult to separate the ‘sparkle’ of a star from the light ingress that planets cause when observed from Earth,” said Dr. Norris. “Most observations of exoplanets come from orbiting telescopes like NASA’s Kepler. With our invention we hope to initiate a renaissance of exoplanet observation from the ground. ”

Novel methods

With the help of the new “photonic wavefront sensor”, astronomers can image exoplanets directly around distant stars from Earth.
Thousands of planets beyond our solar system have been discovered in the past two decades, but only a small handful have been imaged directly from Earth. This severely limits scientific research into these exoplanets.

Creating an image of the planet provides far more information than indirect detection methods such as measuring starlight incursions. Earth-like planets could appear billions of times weaker than their host star. Observing the planet apart from its star is like looking at a 10 cent coin in Sydney as seen from Melbourne.

To solve this problem, the Faculty of Physics’ scientific team developed a “photonic wavefront sensor” that can measure the exact distortion caused by the atmosphere in new ways and correct it thousands of times by the telescope’s adaptive optics systems one second.

“This new sensor combines advanced photonic devices with deep learning and neural network techniques to create an unprecedented type of wavefront sensor for large telescopes,” said Dr. Norris.

“In contrast to conventional wavefront sensors, it can be placed in the same place in the optical instrument where the image is generated. This means that it is sensitive to distortion that is invisible to other wavefront sensors currently used in large observatories, ”he said.

Professor Olivier Guyon of the Subaru Telescope and the University of Arizona is one of the world’s leading experts in adaptive optics. He said: “This is undoubtedly a very innovative approach that is very different from any existing method. It could potentially address several major limitations in current technology.

“We are currently working with the University of Sydney team to test this concept on Subaru in collaboration with SCExAO, one of the most advanced adaptive optics systems in the world.”

Application beyond astronomy

Scientists achieved this remarkable result by building on a novel method to measure (and correct) the wavefront of light that passes through atmospheric turbulence directly in the focal plane of an imaging instrument. This is done using an advanced light converter known as a photonic lantern, which is linked to a neural network inference process.

“This is a radically different approach to existing methods and solves some major limitations in current approaches,” said co-author Jin (Fiona) Wei, a PhD student at the Sydney Astrophotonic Instrumentation Laboratory.

The director of the Sydney Astrophotonic Instrumentation Laboratory at the School of Physics at the University of Sydney, Associate Professor Sergio Leon-Saval, said, “While we came to this problem to solve a problem in astronomy, the technique proposed is extremely relevant for a wide range of fields.

“It could be used in optical communications, remote sensing, in vivo imaging, and any other area where accurate wavefronts are received or sent through a turbulent or cloudy medium such as water, blood, or air.”

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These were the details of the news – AI and photonics to decipher the “twinkling” of the stars… for this day. We hope that we have succeeded by giving you the full details and information. To follow all our news, you can subscribe to the alerts system or to one of our different systems to provide you with all that is new.

It is also worth noting that the original news has been published and is available at de24.news and the editorial team at AlKhaleej Today has confirmed it and it has been modified, and it may have been completely transferred or quoted from it and you can read and follow this news from its main source.

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US astronaut votes early from space station – Space.com

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NASA astronaut Kate Rubins shared her voting selfie from orbit after stating before her launch earlier this month that she would cast her ballot from the International Space Station.

Since 1997, as a concession to the fact that most NASA astronauts live near the agency’s Johnson Space Center in Houston, Texas has had an extreme absentee ballot procedure in place for anyone who finds themselves off Earth on Election Day. It’s requested like any other absentee ballot, but with the address “low Earth orbit”; NASA delivers the digital ballot first to the astronaut, then to the state’s election authorities.

“From the International Space Station: I voted today,” Rubins wrote in a tweet posted on Thursday (Oct. 22).

Related: International Space Station at 20: A photo tour

Rubins arrived in orbit for her second spaceflight on Oct. 14 and will remain on the space station for about six and a half months. She is the only American in space and will remain so on Election Day (Nov. 3).

The three NASA astronauts scheduled to fly on the Crew-1 mission of the SpaceX Crew Dragon capsule had planned to vote from space as well, but delays to their planned Oct. 31 launch mean that they (and a Japanese crewmate) will remain on Earth until mid-November..

In addition to absentee ballots, Texas also permits early voting; the period runs from Oct. 13 to Oct. 30 this year. 

You can check your state’s voting options and make a plan for casting your ballot at vote.org.

Email Meghan Bartels at mbartels@space.com or follow her on Twitter @meghanbartels. Follow us on Twitter @Spacedotcom and on Facebook. 

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