NASA astronomers unravel secret of the supernova
15 years, 1 month ago

NASA astronomers unravel secret of the supernova

The Hindu  

Supernovas have long been used as “cosmic mile markers” to measure the expansion of the universe, but NASA scientists now claim that they have finally discovered what actually sparks the massive stellar explosions. A team of astronomers led by Marat Gilfanov used NASA’s Chandra X-Ray laboratory to study supernovas in five nearby elliptical galaxies and the central region of the Andromeda galaxy — a spiral galaxy closest to our own, the Milky Way. Previously it was thought that Type 1a supernovas were also caused by accretion — when the gravity of a star draws in enough material from a sun-like companion and becomes unstable. However, Akos Bogdan of the Max Planck Institute said: “If the supernovas were produced by accretion, the galaxies would be roughly 50 times brighter in x-rays than actually observed.” It is not clear whether merging is also the primary cause of supernovas in spiral galaxies, and further study is required, he said.

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History of this topic

Scientists predict the explosion of a white dwarf by the end of March, a once-in-a-lifetime event that happens once in 80 years
1 week, 3 days ago

Scientists predict the explosion of a white dwarf by the end of March, a once-in-a-lifetime event that happens once in 80 years

Op India  

In a rare cosmic phenomenon, a star in the ‘Northern Crown’ constellation located 3000 light years away from the Earth, is likely to explode to form a ‘nova’. According to reports, a paper published in Research Notes of the American Astronomical Society predicted three dates for the explosion of the star this year – March 27, November 10 or June …

How to catch a supernova explosion before it happens – and what we can learn from it
3 months, 1 week ago

How to catch a supernova explosion before it happens – and what we can learn from it

Raw Story  

Stars are born, live and die in spectacular ways, with their deaths marked by one of the biggest known explosions in the Universe. In 2009, astronomers observed a bright event 65 million light years away that on first impressions resembled a supernova explosion. Dubbed SN 2009ip, the explosion did not brighten as expected and was reclassified shortly after discovery as …

Isro's AstroSat catches never-before-seen nuclear explosion in Andromeda Galaxy
3 months, 3 weeks ago

Isro's AstroSat catches never-before-seen nuclear explosion in Andromeda Galaxy

India Today  

For the first time, astronomers have detected far-ultraviolet emissions from novae — sudden, bright explosions on stars—during their outbursts in the Andromeda galaxy, our closest large galactic neighbour. Using data from the Ultraviolet Imaging Telescope aboard ISRO’s AstroSat satellite, the researchers identified ultraviolet emissions from 42 novae, including four caught in the act of erupting. “UVIT’s unique ability to observe …

Move over, solar eclipse: Scientists predict a once-in-a-lifetime nova explosion in the coming months
1 year ago

Move over, solar eclipse: Scientists predict a once-in-a-lifetime nova explosion in the coming months

BBC  

Move over, solar eclipse: Scientists predict a once-in-a-lifetime nova explosion in the coming months Nasa The nova T Coronae Borealis explodes about once every 80 years. While the world's attention has been focused on the total solar eclipse that will occur later this spring, the distant Corona Borealis binary system – which contains one dead white dwarf star and one …

Aliens may use supernova as opportunity to send Earth a message, study suggests
1 year, 9 months ago

Aliens may use supernova as opportunity to send Earth a message, study suggests

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy Scientists are observing a nearby star at the end of its life under …

Scientists find galaxies that are releasing intense, mysterious blasts of energy
2 years, 4 months ago

Scientists find galaxies that are releasing intense, mysterious blasts of energy

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy Scientists have built a detailed inventory of galaxies that are releasing the intense, …

Supernova warning system could alert the world to exploding stars, scientists say
2 years, 6 months ago

Supernova warning system could alert the world to exploding stars, scientists say

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Scientists already knew that red supergiant stars nearing the end of their lives have large amounts of …

Star Survives Supernova, Becomes Brighter Leaving Scientists Perplexed
2 years, 9 months ago

Star Survives Supernova, Becomes Brighter Leaving Scientists Perplexed

News 18  

A supernova is a massive explosion of a star, leaving behind nothing of it. However, recently, scientists were taken by surprise when they found that the supernova didn’t destroy the star and made it brighter. After observing a supernova of such a star through the Hubble Space Telescope, scientists witnessed that a star remained alive even after the explosion and …

Amateur astronomers help capture stellar explosion close to cosmic speed limit
2 years, 11 months ago

Amateur astronomers help capture stellar explosion close to cosmic speed limit

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy Thanks to amateur astronomers, new technology, and a fast response by professional observers, …

Astronomers discover new type of stellar explosion called micronova
2 years, 11 months ago

Astronomers discover new type of stellar explosion called micronova

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy A newly-discovered kind of stellar explosion could be commonplace in the universe and …

Astronomers discover new type of star that science cannot yet explain
3 years, 1 month ago

Astronomers discover new type of star that science cannot yet explain

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. “We believe the stars discovered by our German colleagues might have formed in a very rare kind …

Scientists capture first astounding ‘slow supernova’ which could be unique in our galaxy
4 years ago

Scientists capture first astounding ‘slow supernova’ which could be unique in our galaxy

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Instead, it belongs to a slightly weaker version of the supernova called a “Type Lax”, and Sagittarius …

NASA's Hubble telescope captures dreamy 'veil-like' edge of Cygnus supernova blast wave
4 years, 7 months ago

NASA's Hubble telescope captures dreamy 'veil-like' edge of Cygnus supernova blast wave

Firstpost  

The star, 20 times larger than our Sun, went supernova between 10,000 and 20,000 years ago, and its shockwave is still expanding at a rate of around 350 kilometers per second, the space agency said The National Aeronautics and Space Administration has shared an image of “a small section of a Cygnus supernova blast wave,” that has taken the internet …

Supernova seen hurtling through our galaxy after thermonuclear explosion
4 years, 8 months ago

Supernova seen hurtling through our galaxy after thermonuclear explosion

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy Scientists have spotted a white dwarf star hurtling across our galaxy after a …

Astronomers discover supernova ‘twice as bright or energetic’ as any ever recorded
4 years, 11 months ago

Astronomers discover supernova ‘twice as bright or energetic’ as any ever recorded

The Independent  

Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. The scientists believe their discovery to be an extremely rare “pulsational pair-instability” supernova likely triggered …

The brightest supernova ever seen was just discovered
4 years, 11 months ago

The brightest supernova ever seen was just discovered

CNN  

CNN — A supernova brighter and largerthan any other on record has been discovered by scientists at the Center for Astrophysics, a collaboration between the Smithsonian Astrophysical Observatory and the Harvard College Observatory. “In the Milky Way Galaxy, which has experienced a lot of supernova explosions over its lifetime, we don’t actually see stars like this. They need these very …

Bizarre, ultra-massive star is likely two that merged together, astronomers say
5 years ago

Bizarre, ultra-massive star is likely two that merged together, astronomers say

CNN  

CNN — About 150 light-years away from us, there’s a star that just doesn’t add up. The astronomers began to question if the unusual, ultra-massive white dwarf was more than one star, especially due to the puzzling amounts of hydrogen and carbon they detected – likely from two stars, rather than one. “We’re pretty sure of how one star forms …

Scientists find mysterious origin of brightest explosion ever seen in the universe
5 years, 2 months ago

Scientists find mysterious origin of brightest explosion ever seen in the universe

The Independent  

Sign up to our free weekly IndyTech newsletter delivered straight to your inbox Sign up to our free IndyTech newsletter Sign up to our free IndyTech newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. "It became even more exciting when it quickly turned out that very large amounts of iron was …

New image reveals explosive history of Milky Way’s center
5 years, 3 months ago

New image reveals explosive history of Milky Way’s center

CNN  

CNN — Astronomers used a telescope to look into the heart of our galaxy, the Milky Way, in great detail and found a surprising bit of history. The European Southern Observatory’s Very Large Telescope spied evidence indicating more than a hundred thousand supernova explosions caused by a giant burst of star formation. “The conditions in the studied region during this …

Researchers develop theory behind Supernova, explosion of stars in space
5 years, 4 months ago

Researchers develop theory behind Supernova, explosion of stars in space

India TV News  

Researchers develop theory behind Supernova, explosion of stars in space In a bid to know Supernova facts, researchers has put forth a theory that will help us understand how nuclear reactions trigger an explosion of stars and what happens during and after a supernova. In a first, researchers have developed a theory describing how the nuclear reaction behind supernovae -- …

Supermassive blackholes may stunt galaxy growth
5 years, 5 months ago

Supermassive blackholes may stunt galaxy growth

India TV News  

Researchers have found that the strong cosmic winds emerging from supermassive black holes at the centre of dwarf galaxies impact the expansion and evolution of these galaxies by suppressing star formation -- an advance that sheds more light on how galaxies grow and evolve. Canalizo added that supermassive blackholes may even have a profound influence, "if not more dramatic," on …

Astronomers identify "nearby" star system with potential to produce gamma-ray burst
6 years, 4 months ago

Astronomers identify "nearby" star system with potential to produce gamma-ray burst

India TV News  

In a second only to the Big Bang event, astronomers have identified a "nearby" star system with the potential to produce a gamma-ray burst, one of the most energetic events in the universe. According to a research published in Sydney on Tuesday, scientists revealed they have located the first of this rare star system in our galaxy, just 8,000 light …

Spectacular cosmic pinwheel is a 'ticking bomb' set to blast gamma rays across the Milky Way
6 years, 4 months ago

Spectacular cosmic pinwheel is a 'ticking bomb' set to blast gamma rays across the Milky Way

ABC  

Eight thousand light-years away in a constellation called Norma, a spectacular spiral of gas and dust is churning around a doomed star system like we've never seen before. Key points: Astronomers have named the breathtaking pinwheel Apep, after the Egyptian god of chaos and destruction At its centre are two massive, fast-spinning "Wolf-Rayet stars" which appear to be on the …

WHAT IS A SUPERNOVA AND HOW DOES IT FORM?
7 years, 1 month ago

WHAT IS A SUPERNOVA AND HOW DOES IT FORM?

Daily Mail  

Many elements found on Earth are made in the core of stars and these elements travel on to form new stars, planets and everything else in the universe. Read articles that feature this panel The death of a star: 'Unprecedented' image of a supernova 80 million light years away is captured for the first time by an amateur. Astronomers baffled …

Astronomers see supernova shockwave for first time
9 years ago

Astronomers see supernova shockwave for first time

ABC  

The shockwave generated by the explosion of an ageing giant star has been observed by an international team of astronomers. Key points: A supernova occurs when a star collapses in on itself Astronomers have theorised a shockwave was part of this process The shockwave was observed when a red giant exploded The star was 270 times the radius of our …

White dwarf explodes in the galaxy next door: Type 1a supernova spotted in Galaxy M82
11 years, 2 months ago

White dwarf explodes in the galaxy next door: Type 1a supernova spotted in Galaxy M82

The Independent  

Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. Named after its nearest galaxy, supernova M82 looks to be the brightest of its kind …

KABOOM! Nearby Galaxy M82 Hosts a New Supernova!
11 years, 2 months ago

KABOOM! Nearby Galaxy M82 Hosts a New Supernova!

Slate  

I woke up to some great science news: A supernova has gone off in the nearby galaxy M82! The third, which is a recent idea, is that there are actually three stars in the system, a normal star and two white dwarfs. All three scenarios involve very old stars, since it can take billions of years for a normal star …

X-ray vision can reveal birth of supernovae?
12 years, 3 months ago

X-ray vision can reveal birth of supernovae?

Firstpost  

Astronomers have uncovered new evidence that suggests that space-borne X-ray detectors could be the first to spot new supernovae signalling … Astronomers have uncovered new evidence that suggests that space-borne X-ray detectors could be the first to spot new supernovae signalling the death of massive stars. University of Leicester researchers measured an excess of X-ray radiation in the first few …

How supernovae explode, and get their brightness
13 years, 7 months ago

How supernovae explode, and get their brightness

The Hindu  

Scientists have made an important step toward understanding the details of how Type Ia supernovae explode and the origin of their immense luminosity. The widely accepted theory is that Type Ia supernovae are thermonuclear explosions of a white dwarf star in a close binary system. Now, a team of researchers has examined new and detailed observations of 41 of these …

Scientists discover Milky Way's youngest exploding star-英语点津
16 years, 10 months ago

Scientists discover Milky Way's youngest exploding star-英语点津

China Daily  

Download Scientists have announced the discovery of the youngest known exploding star, or supernova, in our Milky Way galaxy. Astronomers using NASA's Chandra X-ray Observatory and the Very Large Array radio telescope in New Mexico have discovered the remains of a supernova, known as "G1.9", which must have lit up our galaxy with a bright flash of light about 140 …

New Explanation for Bright Supernovas: Multiple Explosions
17 years, 4 months ago

New Explanation for Bright Supernovas: Multiple Explosions

Wired  

Researchers puzzled by an extraordinarily bright supernova observed last year have developed a new model that accounts for the phenomenon, describing heavy stars that can actually explode several times in succession. The flareup observed last year, a star known as SN 2006gy, had appeared about 100 times as bright as an ordinary supernova. He argues that the brightness could be …

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