Monday , October 25 2021

Black holes, galactic fountains and a star Big Bang: This week …



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(CNN)
This week, scientists calculated that an interstellar object called "Oumuamua" could be a foreign detection because of the way it is accelerated through our solar system as it springs last year.

Parker Solar Probe does well, despite its first narrow brush with the sun, 15 million miles from its surface, as it has moved closer to our star than any spacecraft has escaped. The runner of the Mars Curiosity just took a nice long drive along the Mars surface, the biggest one after a computer malfunction in September. And Opportunity, the other runner on Mars, is still sadly quiet.

Let's see what else you lost during this week.

Galactic Fountain

This is a fountain in which you would not want to play, but it's nice to see.

More than a billion light years from Earth, a black hole at the center of the giant elliptical galaxy Abell 2597 draws cold molecular gas and spills it back with jets or fountains. Observations from Atacama Large Arms telescope millimeter / dimmer meter of the European Observatory Observatory were published this week in The Astrophysical Journal.

This process is doomed to be repeated again and again. Cold gas falls into the black hole, igniting the black hole, and jets jet-fired creatures in space. But the creature can not escape the gravity of the galaxy, so it rains back to the black hole.

"The evolution of galaxies can be quite chaotic and large galaxies tend to live hard and die young," said Timothy Davis of the University of Cardiff, Faculty of Physics and Astronomy. "For the first time, we have been able to observe the full circle of an oversized black hole crash that acts to regulate this process by prolonging the life of galaxies."

The black holes merge

We know that galaxies are merging to form larger galaxies, but for the first time, astronomers actually observe several pairs of galaxies as they meet. And they were able to see oversized black holes in the centers of these galaxies coming together to form a giant black hole.

The research was published in Nature magazine this week.

"Seeing the pairs of galaxy merging nuclei associated with these huge black holes so near were very amazing," said Michael Koss, a researcher at Eureka Scientific. "In our study, we see two nuclei of galaxies right when the images were taken. You can not discuss it, it is a very" pure "result that is not based on interpretation."

Archival images from the Hubble Space Telescope, as well as high-resolution images received by W. M. Keck Observatory's adaptive visual system, provided the impressive first appearance.

This will probably happen 4 billion years since our galaxy is galaxy merging with the neighbor of Andromeda's galaxy.

Death of a galaxy

A neighboring galaxy dwarf called the Small Magellanic Cloud is only a fraction of the size of the Galaxy and loses the power it uses to form stars.

Thin details provided by radio images from SKA Pathfinder telescope telescope in Australia, published in a Nature Astronomy study this week, show the killing of the galaxy as it loses gas.

"Galaxies that stop forming stars gradually fade into oblivion, a kind of crude death for a galaxy if it loses all of its gas," said Naomi McClure-Griffiths of the Australian National University's Astronomy and Astrophysics Research School.

Ultimately, astronomers believe they will be consumed by the Milky Way.

A homeless cluster

These stars are a little wild duck. Meet the cluster of wild ducks, where 2,900 stars live together.

Astronomers consider that open sets of stars will only contain stars from the same generation. But the Wild Duck cluster has bright stars in different colors, suggesting they are different ages. Blue stars are usually younger and red stars are usually big.

But in a new study, the researchers realized that the open cluster is playing a trick on them. The way they rotate causes them to appear as different ages and colors.

Their rotation causes their wavelength to appear as one side of the star sees the Earth, distorting the light they emit and making them appear blue or red.

A star a long time ago

Astronomers have found what could be one of the oldest stars in the universe, meaning they are made of materials originally released by the Big Bang. The star of 13.5 billion years is tiny, low in mass and low in metal, which may be indicative of the first ever stars.

The first stars would be full of elements like the sun, hydrogen and lithium, producing heavier elements and spreading them throughout the universe as they exploded. This would allow later stars to have more metals and other elements.

This star was found to be an almost invisible secondary star in a binary star system. And if this old star can be observed, perhaps there are even older ones to study.

"This star is probably one in 10 million," said Kevin Schlaufman, professor of physics and astronomy at Johns Hopkins University. "He tells us something very important about the first generations of stars."

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