Tech & Science A "potentially dangerous" asteroid will soon graze the Earth

21:30  01 december  2021
21:30  01 december  2021 Source:   maxisciences.com

Man Keeps a Rock For Years, Hoping It's Gold. It Turned Out to Be Far More Valuable

  Man Keeps a Rock For Years, Hoping It's Gold. It Turned Out to Be Far More Valuable In 2015, David Hole was prospecting in Maryborough Regional Park near Melbourne, Australia. Armed with a metal detector, he discovered something out of the ordinary – a very heavy, reddish rock resting in some yellow clay. He took it home and tried everything to open it, sure that there was a gold nugget inside the rock – after all, Maryborough is in the Goldfields region, where the Australian gold rush peaked in the 19th century. To break open his find, Hole tried a rock saw, an angle grinder, a drill, even dousing the thing in acid. However, not even a sledgehammer could make a crack. That's because what he was trying so hard to open was no gold nugget.

Illustration d'un astéroide dans le ciel étoilé. © provided by Gentside illustration of an asteroid in the starry sky.

" potentially dangerous ", this is how NASA ranks the asteroid 4660 Nereus , which will increase to 3.9 million kilometers from the Earth, December 11, 2021.

No real threat of impact

Let's raise the suspense right now: there is no real danger of impact with the Earth . However, the astronomers of the American space agency monitor it closely, because it is the spatial rock the biggest and fastest to approach the earth in this year 2021.

indeed, If the distance of nearly 4 million kilometers may seem important to our humans, it is not at the astronomical scale. An asteroid is considered

as "potentially dangerous" (PHO), when the distance that separates its orbit from the earth is less than 0.05 astronomical units, or less than 149 million kilometers about .

The shoebox-sized satellites that could change the world

  The shoebox-sized satellites that could change the world The CubeSat began as an educational tool but is now helping out humanity"They couldn't put very much in it, which was the real challenge. It forced them to quit adding things to their designs," Bob says, laughing.

"Nereus", a large asteroid like the Eiffel Tower to represent the speed to which Nereus moves, it would be

once faster than the aircraft F-16 . Discovered in February 1982 by the United States Astronomer Eleonor Francis Helin from the Astronomical Observatory of Palomar (United States), the researchers also know him as " 1982 dB ".

Its diameter is

330 meters , hence the comparison with the Eiffel Tower, and its rotation period is 15.1 hours . According to the Center for Near Earth Object Studies (CNEOS) of NASA , it should be only 1.2 million kilometers from the Earth, by 2060 . Not to miss anything from our news, subscribe to

our newsletter!

Online sellers 'hotbed' for risky goods say experts .
Fire services and safety experts ask the government to reform laws to hold shopping sites accountable.Online marketplaces are a "hotbed" for risky electronics, such as hairdryers and straighteners with electric shock risks, and dangerous toys, it says.

usr: 0
This is interesting!