Archive for the ‘cosmology’ category: Page 353
Nov 23, 2018
You’ve got to move fast on #BlackFriday2018 when there are limited quantities
Posted by Michael Lance in categories: cosmology, materials
Here’s a look at fast-moving jet material from the powerful gravity of a supermassive black hole when a star wandered just a little too close: https://go.nasa.gov/2FAO1XB #BlackHoleFriday
Nov 22, 2018
Massive Triple Star System Creates this Bizarre Swirling Pinwheel of Dust. And it Could be the Site of a Gamma Ray Burst
Posted by Genevieve Klien in category: cosmology
When stars reach the end of their lifespan, many undergo gravitational collapse and explode into a supernova, In some cases, they collapse to become black holes and release a tremendous amount of energy in a short amount of time. These are what is known as gamma-ray bursts (GRBs), and they are one of the most powerful events in the known Universe.
Recently, an international team of astronomers was able to capture an image of a newly-discovered triple star system surrounded by a “pinwheel” of dust. This system, nicknamed “Apep”, is located roughly 8,000 light years from Earth and destined to become a long-duration GRB. In addition, it is the first of its kind to be discovered in our galaxy.
Nov 22, 2018
It’s #BlackFriday, but we don’t do much shopping in space
Posted by Michael Lance 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
Nov 21, 2018
‘God of chaos’: Milky Way star on the brink of massive gamma-ray supernova explosion
Posted by Michael Lance 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.
Nov 21, 2018
What do sand, glass ⌛ and this technicolor remnant of a supernova 💥 have in common?
Posted by Michael Lance 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
Nov 21, 2018
Why Changing-Look Quasars Appear to Vanish
Posted by Genevieve Klien in category: cosmology
Quasars powered by supermassive black holes have been unexpectedly vanishing. Scientists have started to figure out why.
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:
Nov 20, 2018
Star spotted on the brink of a gamma ray burst – and it’s alarmingly close to Earth
Posted by Genevieve Klien 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.
Nov 20, 2018
A dark matter hurricane is headed our way
Posted by Michael Lance 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.