The Sun will become a giant crystal ball when it dies
11 Janvier, 2019, 08:39 | Auteur: Therese Cote
Like the vast majority of stars in our Milky Way galaxy, the sun will eventually collapse into a white dwarf, an exotic object about 200,000 times denser than Earth. "The sun itself will become a crystal white dwarf in about 10 billion years". To put that in perspective: A mere teaspoon of white-dwarf material would weigh about as much as an elephant, if you could somehow transport the stuff to our planet.
One of Discover's favorite space artists and regular contributors, Mark Garlick, created this impression of a white dwarf star solidifying to accompany the announcement.
Data was compiled by the European Space Agency's Gaia and analyzed over a span of five years, looking at approximately 15,000 white dwarfs within close proximity to the Sun, approximately 330 light-years away. The work verified earlier predictions that such a catalog of white dwarf stars would reveal a number in the slow process of turning from what is essentially a liquid form to a solid state. Gaia does this by precisely monitoring the positions of huge numbers of stars; the mission team aims to study 1 billion stars over the spacecraft's operational lifetime. In the process, they uncovered a "pile-up" of stars with colors and luminosities that matched those predicted for crystallized white dwarfs.
Though they look serene and silent from our vantage on Earth, stars are actually roiling balls of violent plasma. Therefore, gaining a greater understanding of how crystallization can stave off the cooling process, essentially making the stars appear younger than they really are, would help astronomers improve the accuracy of the white dwarf dating technique.
Messi & Suarez miss Copa del Rey tie at Levante
Ousmane Dembele joined Coutinho in completing a full 90 minutes and the Blaugrana boss insisted he was satisfied with both players, while encouraging them to press for continued opportunities.
Former Number One Spieth Eyes Comeback Year In 2019
Spieth failed to win a tournament last season and has finished inside the top 10 just once in his last 15 starts on the PGA Tour. It was all over Jon Rahm (12-1) at the 2018 Hero World Challenge, projecting him as a top contender from the start.
The team in Warwick studied 15,000 white dwarf candidates within around 300 light years of Earth and measured their colour and luminosity for clues about their composition.
"Not only do we have evidence of heat release upon solidification, but considerably more energy release is needed to explain the observations", Tremblay said.
But whether the Earth's rocky core will survive is uncertain. "This will push the carbon upwards, and that separation will release gravitational energy".
Friends of Bernie Sanders also called Becker's alleged misconduct "deplorable and fundamentally unacceptable". Becker, 50, reportedly did this to the 20-something campaign staffer at a bar in Philadelphia in July 2016.
He added: " We, definitely, as the Indian cricket team do not support views like that and that has been communicated . Meanwhile, Hotstar - the streaming service for Star Network - has pulled down the episode following the controversy .
When authorities responded to the home minutes later, they found the front door kicked in and the couple had been shot to death. When the dispatcher called the number back, a voice mail greeting indicated the phone belonged to Denise Closs.
Ms Heeley asked if the alleged victim had said anything to Mr Hepburn to indicate she wasn't enjoying the sex. Prosecutor Miranda Moore QC said: "Next thing the woman could remember was a man straddling her shoulders".
The department is considering the request "in the usual way, as it does with all UNHCR referrals", the spokesperson said. She only joined the social media site at the start of this month but has quickly racked up more than 100,000 followers.
The mother was able to free herself but the teen was covered in two metres of snow and was unable to break free. That brought to at least 17 the number of weather-related deaths reported in Europe over the past week.
While the numbers are still preliminary, if they pan out, that would make 2018 the biggest coal plant closure year on record. The New York-based Rhodium Group, which released its findings on January 8, said its study used data from the U.S.
Le Shin Bet et la police israélienne l'avaient arrêté en mai dernier et son procès s'était ouvert début juillet à Jérusalem . Considéré par Israël comme étant sa véritable bête noire, Téhéran est regardé d'un oeil soucieux par l'État hébreu.
Tenshin Nasukawa Responds To Conor McGregor Callout
The Japanese athlete came into the limelight after the announcement of his fight with American boxing champion Floyd Mayweather. Nasukawa first faced off against Mayweather in an exhibition match, where he was forbidden from using kickboxing techniques.
Giants To Announce Naming Rights Deal With Oracle
The team's ballpark at 24 Willie Mays Plaza will be renamed from AT&T Park to Oracle Park for the next two decades, the team said. Oracle is reportedly paying significantly more money for rights than AT&T did under the old deal.
‘Criminal Minds’ to End After Season 15
Variety reports the show is now shooting Season 14, which consists of fifteen episodes. "It is the quintessential CBS hit. The final season announcement comes with possibility of former beloved characters to possibly return for the series.
Ramsey To Undergo Medical This Weekend Ahead Of Juventus Move
The Welshman is expected to sign a five-year contract with the Old Lady, worth an estimated €40m, before moving to Turin in July. Ramsey has scored 52 goals for Arsenal including the all-important FA Cup winners against Hull City and Chelsea respectively.