List of All Articles with Tag 'pa'

By Borja Suarez TENERIFE, Canary Islands, Spain (Reuters) -More than 3,000 people on the Spanish island of Tenerife evacuated their

The Pentagon’s No. 2 official said that the threat of a government shutdown and other internal upheaval in

Federal Reserve Bank of San Francisco President Mary Daly said policymakers can hold interest rates steady if the

A viral clip proves players can armor swap on a zipline in Apex Legends by staying close enough to a deathbox to properly armor swap.

President Joe Biden said he sought to redirect funds to build a border wall but was unsuccessful —

After getting benched in Week 4, Mac Jones needs to show the New England Patriots he is still capable of being the team's long-term option at QB.

Progressive scholar Cornel West announced Thursday he will run as an independent candidate in the 2024 presidential election, abandoning his campaign for the Green Party's nomination.

Azerbaijan’s refusal to attend a summit orchestrated by Emmanuel Macron is casting doubt on the French president’s diplomatic

Pamela Anderson went without makeup for Paris Fashion Week and Jamie Lee Curtis found it beautiful.

Earth has been hit by a blast from a dead star so energetic that scientists cannot explain it. The burst of gamma rays, originating in a dead star known as a pulsar, is the most high energy of its kind ever seen. It was equivalent about ten trillion times the energy of visible light, or 20 tera-electronvolts. Scientists are unable to explain exactly what kind of a scenario could lead a pulsar to emit such intense energy, and the researchers behind the breakthrough say that it “requires a rethinking of how these natural accelerators work”. Scientists hope that they can find yet more powerful energy blasts from pulsars, with a view to better understanding how they are formed. Pulsars are formed when a star dies, exploding in a supernova and leaving behind a tiny, dead star. They are just 20 kilometres across, and spin extremely fast with a powerful magnetic field. “These dead stars are almost entirely made up of neutrons and are incredibly dense: a teaspoon of their material has a mass of more than five billion tonnes, or about 900 times the mass of the Great Pyramid of Giza,” said Emma de Oña Wilhelmi, a scientist at the High Energy Stereoscopic System observatory in Namibia that detected the blast. As pulsars spin, they throw out beams of electromagnetic radiation, throwing it out like a cosmic lighthouse. That means that someone in one spot – like the Earth – will see the radiation pulses flash in a regular rhythm as they spin past. The radiation is thought to be the result of fast electrons that are produced and thrown out by the the pulsar’s magnetosphere, which is made up of plasma and electromagnetic fields that surround the star and spin with it. Scientists can search the radiation for different energy bands within the electromagnetic spectrum, helping them understand it. When scientists previously did that with the Vela pulsar examined in the new study, they found that it was the brightest everseen in the radio band, and the brightest persistent source in the giga-electronvolts. But the new research found that there is a part of the radiation with even more high energy components. “That is about 200 times more energetic than all radiation ever detected before from this object,” said co-author Christo Venter from the North-West University in South Africa. Scientists don’t know exactly how that could happen. 
“This result challenges our previous knowledge of pulsars and requires a rethinking of how these natural accelerators work,” says Arache Djannati-Atai from the Astroparticle & Cosmology (APC) laboratory in France, who led the research. “The traditional scheme according to which particles are accelerated along magnetic field lines within or slightly outside the magnetosphere cannot sufficiently explain our observations. “Perhaps we are witnessing the acceleration of particles through the so-called magnetic reconnection process beyond the light cylinder, which still somehow preserves the rotational pattern? But even this scenario faces difficulties to explain how such extreme radiation is produced.” An article describing the findings, ‘Discovery of a Radiation Component from the Vela Pulsar Reaching 20 Teraelectronvolts’, is published today in the journal Nature Astronomy. Read More ‘Ring of fire’ solar eclipse this month will be last until 2046 Mystery behind massive star suddenly vanishing decoded New discovery is ‘holy grail’ breakthrough in search for aliens, scientist say ‘Ring of fire’ solar eclipse this month will be last until 2046 Mystery behind massive star suddenly vanishing decoded New discovery is ‘holy grail’ breakthrough in search for aliens, scientist say

With the 2023-24 season all but underway, here are our preseason EuroLeague power rankings, season preview, and betting odds. In what is shaping up to be one of the most competitive seasons in the competition’s history, ranking these teams was not easy.

James Harden and the Philadelphia 76ers remain locked in an ugly public battle following the superstar’s trade demand. These are the good, the bad, and the ugly trades to end the standoff.