Black Holes, Galactic Fountains, and Big Bang Star: This week …

This week scientists speculated that an interstellar object called "Oumuamua" could be an extraterrestrial probe caused by its acceleration in our solar system when it flashed last year.

Parker Solar Probe, despite its first tight sunbathing brush, 15 million miles from its surface, was doing well as it approached our star before any spacecraft vanished. Mars Curiosity rover went on a long journey along Mars' surface, the longest after a computer break in September. And the opportunity, the second rover on Mars, is unfortunately still.

Here's something you missed last week in the universe.

Galactic fountain

It's one fountain in which you do not want to play, but it's beautiful to see.

More than a billion light-years from Earth, the black hole in the middle of the giant elliptical galaxy, Abell 2597, draws on cold molecular gas and spills it back in its nozzle or fountain. Observation from the Atacama Large Millimeter / Submillimetre Array of Telescopes and the European Southern Observatory was a very large telescope was published this week in The Astrophysical Journal.

This process is condemned to repeat itself again and again. Cold gas falls into a black hole, ignites a black hole and releases plasma plasma into the universe. But the plasma can not escape the gravity of the galaxy, so it rains back into the black hole.

"The evolution of the Galaxy can be quite chaotic and large galaxies tend to live hard and die young," said Timothy Davis of the Faculty of Astronomy at Cardiff University. "For the first time, we were able to observe the whole cycle of a supermassive black hole that regulates this process and prolongs the life of galaxies."

Black holes connect

We know that galaxies connect and form larger galaxies, but for the first time, astronomers have actually observed several pairs of galaxies when they met. And they could see supermassive black holes in the centers of these galaxies that joined together to create a giant black hole.

The research was published in Nature this week.

"Seeing the pair of connecting nuclear galaxies associated with these huge black holes that are so close to each other was pretty amazing," said Michael Koss, research scientist at Eureka Scientific. "In our study, we see two galaxies of the nucleus just when images were taken, you can not argue with it, it is a very" pure "result that does not rely on interpretation."

The Hubble Space Telescope images, as well as the high-resolution images taken by the W. M. Keck Observatory adaptive optical system, provided a stunning first glance.

This is probably what happens in the four billion years since our Milky Way galaxy was connected with the neighbor of the Andromeda galaxy.

The death of a galaxy

The neighboring dwarf galaxy, called Small Magellanic Cloud, is just a fraction of the size of the Milky Way – and loses the power it uses to create stars.

Fine details provided by radio images from the telescopic field of SKA Pathfinder, which were published in Science Week, show that the galaxy dies because it loses gas.

"Galaxies that stop creating stars are gradually losing their forgetfulness, a slow death for the galaxy if they lose all the gas," says Naomi McClure-Griffiths of the Australian National University's Astrophysical School.

Eventually, astronomers believe they will be silent.

A herd of stars

These stars are a bit of a wild duck. Meet the wild duck where 2900 stars live.

Astronomers thought that open clusters of stars contain only stars that come from the same generation. But the wild duck has bright stars in different colors, indicating that they are different ages. Blue stars are usually younger and red stars are usually older.

But in a new study, scientists have realized that an 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 spotted because one side of the star faces the Earth, disturbing the light they emit and causing it to appear blue or red.

Star from long, long ago

Astronomers have discovered what could be one of the oldest stars in the universe, which means they are made of materials originally released from the Big Bang. The 13.5 billion-year-old star is small, lightweight and low in metal, which could indicate the first stars ever to be born.

The oldest stars would be full of elements like helium, hydrogen and lithium, creating heavier elements and spreading them throughout the universe when they explode. This will allow later stars to have more metals and other elements.

This star was found to be an almost invisible secondary star in the binary star system. And if this old star can be observed, there may be even older ones that need to be studied.

"This star is perhaps one of ten million," says Kevin Schlaufman, professor of physics and astronomy at Johns Hopkins University. "He tells us something very important about the first generation of stars."

Copyright 2018 from CNN NewSource. All rights reserved. This material may not be published, transmitted, transcribed, or redistributed.

Source link