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“You will turn into an embittered hag”: Abrikosov teased Buzova

by Alexandra Hartman Editor-in-Chief
written by Alexandra Hartman Editor-in-Chief
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Technology

“Micronova” .. starbursts amaze astronomers

by Alexandra Hartman Editor-in-Chief
written by Alexandra Hartman Editor-in-Chief

Washington – Archyde.com
Astronomers have discovered a previously unknown type of stellar explosion called “micronova”, which involves thermonuclear explosions in the polar regions of a type of burning star called a “white dwarf” following drawing material from a companion star.
The researchers said Wednesday that the micronova is the least powerful type of star explosion known now, as it is less energetic than the explosion known as a “nova”, which occurs when the entire surface of the white dwarf explodes, and is small, compared to a “supernova” or “supernova”. What happens during the death of giant stars.
The “micronova” was observed from Earth in the form of flashes of light lasting regarding ten hours. And documented on three white dwarfs, one at a distance of 1680 light years from Earth, one at a distance of 3720 light years, and one at a distance of 4900 light years. A light year is the distance that light travels in a year, equivalent to 9.5 trillion kilometers.
“The discovery was an unexpected surprise,” said astronomer Simon Scaringi of Durham University in England, lead author of the study published in the journal Nature. Show how dynamic the universe is. These events are rapid and intermittent. Finding it requires looking at the right place at the right time.”
White dwarfs, which are among the densest objects in the universe, are caused by the collapse of the core of a dying star. White dwarfs have the mass of the Sun, but are regarding the size of Earth in diameter. Most stars, including the Sun, are destined to end their existence this way.
A micronova is similar to a nova, a thermonuclear explosion that engulfs the entire surface of a white dwarf. In the case of Nova, the white dwarf lacks a strong magnetic field, which means the hydrogen stolen from the companion star is distributed globally rather than concentrated at the poles.
Scaringi said a nova can last for weeks or months, burning through a mass a million times greater than a micronova.
The researchers discovered the “micronova” when analyzing data from the TESS space telescope. The researchers used the European Southern Observatory’s Very Large Telescope to confirm that the eruptions involved white dwarfs.
Other types of starbursts include kilonovas, a phenomenon that occurs when two neutron stars or a neutron star and a black hole merge, and hypernova, a type of supernova in which a star explodes at the end of its life cycle and collapses to form a black hole.

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Technology

International news – Scientists warn of “NASA” cosmic communication with creatures that may invade Earth

by Alexandra Hartman Editor-in-Chief
written by Alexandra Hartman Editor-in-Chief

Muhammad bin Masoud – Dammam – NASA intends to transmit data to a part of the Milky Way galaxy that it believes is most likely to have other civilizations in it, to show it the location of the solar system in the galaxy, and the Earth in particular, by informing it of the digital images of the solar system in the data. The surface of the globe and its inhabitants, male and female, in addition to the biochemical composition of life in it, as well as basic mathematical and physical calculations to create a means of “cosmic communication” in the future.

However, this step “may unintentionally lead to a foreign invasion of Earth,” according to what scientists from the University of “Oxford” British warned, in a message they called Beacon In The Galaxy, or “a beacon in the galaxy,” according to what Al Arabiya.net reported from the newspaper. The British “graph”, an updated version of a message known as the Arecibo Message containing similar information, was transmitted in 1974 by radio waves from a radio telescope in Puerto Rico.

That message, which is considered the first serious attempt to communicate with extraterrestrial beings, and below is a video of it, carried at the speed of light of 300,000 kilometers per second, simple information regarding humanity and the Earth, scheduled to arrive following 25 thousand years to a part of the “Milky Way” known as Messier 13 crowded with millions of stars Perhaps, perhaps one or more of them will be the title of a system around which planets revolve, in one of which there are creatures as on Earth.

But NASA, which does not plan to broadcast the same message, is proposing to send a new one of the largest telescope in the world, a spherical radio telescope, with an aperture of 500 meters in diameter, in China, as well as through the Allen group of telescopes of the SETI Institute in northern California, and it also needs 25 thousand years to reach, And if a civilization picks it up, the Earth will wait for the same time to receive a response from it, either peace or aggression, according to what can be deduced from what the warning warned regarding.

Peaceful and hostile civilizations

One of the warnings in the letter, a Swedish researcher, Anders Sandberg, who is active in an institute affiliated with Oxford University, known internationally as the Future of Humanity Institute, which specializes in future foresights, stated to the newspaper that “sharing such information represents a risk, although the chance of it reaching a strange civilization is very small, But because sending it has such a big impact, it actually needs to be taken a bit seriously,” he said.

Also of warning, a colleague at the same institute, a doctor like him, is the Australian Toby Ord, also a researcher in the affairs of foresight and futures, who made similar arguments in a book he wrote two years ago entitled The Precipice and analyzed the existential risks and the future of humanity, explaining, “The main question is regarding the proportion of Peaceful civilizations compared to hostile civilizations” if they existed in space.

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Technology

Climate change on Neptune? Temperatures are rising at the South Pole

by Alexandra Hartman Editor-in-Chief
written by Alexandra Hartman Editor-in-Chief

Astronomers from the European Southern Observatory have measured unexpected temperature changes on Neptune. Between 2003 and 2018, the global average temperature on the ice giant fell by eight degrees Celsius, writes a team led by Michael Roman from the University of Leicester and Glenn Orton from the Jet Propulsion Laboratory in the Planetary Science Journal. But at the South Pole itself, temperatures rose by 11 degrees Celsius between 2018 and 2020. These changes surprised the scientists.

Surprising rise in temperature at the South Pole

Of the planets in the solar system known to date, Neptune is the furthest out. It orbits the star at a distance of regarding 30 times that of Earth and is freezing cold: the atmosphere, which consists mainly of hydrogen, helium and methane, has an average temperature of -220 degrees Celsius. But like on Earth, temperatures fluctuate with the seasons. With the difference that a Neptune year, i.e. one orbit around the sun, lasts 165 Earth years.

It has been summer in the southern hemisphere since 2005. A team of astronomers has been taking thermal images of the planet for the 17 years since, using the best telescopes on Earth. These show that the planet cooled by 2018. In the last two years, there has been a surprising jump in temperature at the South Pole. “Our data cover less than half of a Neptune season, so nobody expected to see big and rapid changes,” says co-author Glenn Orton.

Possible cause: solar cycle

So far, the researchers have no explanation for the sharp fluctuations. Fluctuations in stratospheric chemistry, random weather patterns or changes caused by the solar cycle are possible. This should now show further data that are to be collected in the coming years.

In addition to the Very Large Telescope (VLT) of the European Southern Observatory, the Subaru, Keck and Gemini South and North telescopes were also involved in the investigation. The researchers also used data from NASA’s Spitzer Space Telescope.

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