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Archive for the ‘cosmology’ category: Page 266

Nov 22, 2018

It’s #BlackFriday, but we don’t do much shopping in space

Posted by in category: cosmology

It’s #BlackFriday, but we don’t do much shopping in space. Instead, join us for our 6th annual #BlackHoleFriday where we’ll share awesome images and facts about black holes! https://go.nasa.gov/2FB9qQD

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Nov 21, 2018

‘God of chaos’: Milky Way star on the brink of massive gamma-ray supernova explosion

Posted by in category: cosmology

A star 8,000 light years from Earth is on the verge of a huge supernova explosion, which could produce the Milky Way’s first gamma-ray explosion, a dangerous and extremely energetic event.

Australian scientists at the University of Sydney discovered the rare ‘God of chaos’ star, which they say could produce the Milky Way’s first known gamma-ray burst, a lethal combination of dust and gas mixed with wind as fast as 12 million km/ph, which is one of the most extreme energetic events after the Big Bang.

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Nov 21, 2018

What do sand, glass ⌛ and this technicolor remnant of a supernova 💥 have in common?

Posted by in categories: cosmology, materials

They all contain silica, a mineral that’s widespread on Earth and in space.

Using NASA’s Spitzer Space Telescope, researchers found that the material is produced by the massive explosions of stars. Details: https://go.nasa.gov/2r6Zq7P

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Nov 21, 2018

Why Changing-Look Quasars Appear to Vanish

Posted by in category: cosmology

Quasars powered by supermassive black holes have been unexpectedly vanishing. Scientists have started to figure out why.

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Nov 20, 2018

The life cycle of a neutron star

Posted by in category: cosmology

When a massive star somewhere in our galaxy runs out of fuel, it collapses and explodes in a supernova.

The death of that star is the birth of a neutron star: one of the densest known objects in the universe:

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Nov 20, 2018

Star spotted on the brink of a gamma ray burst – and it’s alarmingly close to Earth

Posted by in category: cosmology

With the power to unleash as much energy in 10 seconds as the Sun does in its entire lifetime, gamma-ray bursts (GRBs) are the most energetic events in the universe, second only to the Big Bang itself. Given how sudden they are, we don’t usually get any warning, but now astronomers have spotted the telltale signs of a star system that could blow its lid any moment – and it’s far too close to Earth for comfort.

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Nov 20, 2018

A dark matter hurricane is headed our way

Posted by in categories: climatology, cosmology

According to a recent paper, the Earth is caught directly in the crosshairs of a cosmic hurricane. A swarm of nearly 100 stars, accompanied by an even greater amount of dark matter, is aimed directly at our stellar neighborhood and there’s nothing we can do to stop it; in fact, the vanguard is already upon us. This sounds like a perfect summer blockbuster movie, starring The Rock and Chris Pratt, or maybe Scarlett Johansson and Charlize Theron.

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Nov 20, 2018

Dark energy is mutating, with grave consequences for the cosmos

Posted by in category: cosmology

No one really knows what dark energy is, beyond the fact that it makes up two-thirds of everything – but the signs are that it’s growing stronger.

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Nov 20, 2018

Observing Supermassive Black Holes in Virtual Reality

Posted by in categories: cosmology, virtual reality

Click on photo to start video.

Researchers have created a virtual reality simulation of a supermassive black hole. In a recent paper in “Computational Astrophysics and Cosmology” they present their latest visualization. The simulation is based on the black hole in the center of our own Galaxy; Sagittarius A* (Sgr A. Read this SpringerOpen blog to learn more. https://bit.ly/2S2Xh8p

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Nov 19, 2018

Researchers have created a virtual reality simulation of a supermassive black hole

Posted by in categories: cosmology, virtual reality

The black hole at the centre of our galaxy, Sagittarius A*, has been visualised in virtual reality for the first time. The details are described in an article published in the open access journal Computational Astrophysics and Cosmology.

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