William Peixoto

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Supermassive Black Holes Were Born Big, Spacecraft Data Suggest

The gigantic black holes that lurk at the hearts of galaxies were apparently born big.<p>The central black holes in dwarf galaxies — the "seeds" that grow into the monsters at the core of the Milky Way and other large galaxies — are probably surprisingly weighty, containing 1,000 to 10,000 times the …

Estudantes nas ruas apoiam a direita na Venezuela

Bolas de golfe servem de munição quando acabam as pedras para armar estilingues. Nos capacetes de proteção, micro-câmeras de alta definição registram …

Rússia promete diálogo com Ucrânia, mas não com governo interino

A Rússia quer ter relações respeitosas com a Ucrânia, mas não com o governo interino. A declaração foi feita na manhã desta segunda-feira (3) pelo …

Biólogo encontra garrafa jogada ao mar por cientista em 1956

Cientista jogou 300 mil garrafas para estudar as correntes marítimas. Bilhete no interior do recipiente orientava a contatar centro de pesquisa.

EXAME

article<p>EXAME<p>https://exame.abril.com.br/ciencia/astronautas-substituem-bomba-de-refrigeracao-da-estacao/<p>Astronautas substituem bomba de refrigeração …

Vitória, ES, é única capital brasileira escondida no Google Maps

Capital do Espírito Santo aparece na ferramenta após 8 'scrolls' do mouse. Após localizar cidade, basta afastar a tela uma única vez para ela sumir.

The Goldilocks Zone for Planets Is Growing

Climate modeling suggests life can get by even on hot planets millions of miles closer to their stars than the Earth is to the sun.<p><b>The Milky Way is home to an estimated 22 billion rocky planets</b> that may be capable of sustaining life. These planets orbit their stars in the habitable zone—the region …

Universe

Scientists Discover a Jewel at the Heart of Quantum Physics

Physicists reported this week the discovery of a jewel-like geometric object that dramatically simplifies calculations of particle interactions and …

The weird object near Saturn’s A ring

A member of the Cassini spacecraft’s imaging team spied a mysterious object at edge of Saturn’s A ring and named it Peggy.<p>On April 15, 2013, the …

Wormholes and Quantum Entanglement May Be Linked

This advance is so meta. Theoretical physicists have forged a connection between the concept of entanglement—itself a mysterious quantum mechanical …

Extreme black hole is more luminous than astronomers thought possible

For decades, astronomers have puzzled over an odd source of X-ray light in an arm of the galaxy M101, just off the handle of the Big Dipper. The …

WISE spots possible massive black hole duo

Astronomers have spotted what appear to be two supermassive black holes at the heart of a remote galaxy, circling each other like dance partners. The …

Cassini spacecraft obtains best views of Saturn hexagon

NASA’s Cassini spacecraft has obtained the highest-resolution movie yet of a unique six-sided jet stream, known as the hexagon, around Saturn’s north …

Um, Where Did This Little Orphan Planet Come From?

"I had often wondered if such solitary objects exist, and now we know they do."<p>How do planets—ours, and the others that stud the universe—actually form?<p>Our current, best knowledge posits that planets emerge from the formation of stars. Through a process like this:<p>A star and its planets form out of …

The National Ignition Facility Just Got Way Closer To Fusion Power

In a major first, an experiment in the California lab got more energy out of its fuel than went into the fuel. We're one step closer to ignition, when the reaction becomes self-sustaining.<p>Researchers at the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory in California …

Evidence of a comet that rained 'a shockwave of fire' detected on Earth

A comet that struck Earth around 28 million years ago annihilated part of modern-day Egypt — but managed to leave behind a few relics for modern scientists to marvel over.<p>According to a team of South African researchers, a small pebble discovered by an Egyptian geologist in 1996 has been identified …

Monster Black Hole Caught Swallowing Unlucky Star

Call it a Cosmic Scene Investigation: For the first time, scientists have identified a stellar victim of a giant black hole — an unlucky star whose …

An eruptive prominence grew unstable on the sun, and blew out into space over a 5-hour period on Sept. 24, 2013, as seen by NASA's Solar Dynamics Observatory (SDO). http://oak.ctx.ly/r/dzwa

The Galaxy's Core Is About to Explode

The supermassive black hole at the center of the Milky Way Galaxy will soon consume a blob of gas and begin to radiate energy at a tremendous rate.

Mathematics Links Quantum Encryption and Black Holes

A proposed mathematical proof that outlines the way information behaves in coded messages may have implications for black holes. The proof suggests …

Absolutely Stunning 3-D View of a Cosmic Cloud

To call Finnish astrophotographer J-P Metsävainio a magician is definitely not an exaggeration! Take a look at his latest handiwork, this amazing 3-D …

Mestre japonês da animação, Miyazaki encerra carreira de diretor - Cinema - iG

Hayo Miyazaki, ganhador do Oscar por "A Viagem de Chihiro", anunciou nesta sexta-feira (6) que vai se aposentar aos 72 anos<p>O animador japonês …

Does Earth have a second moon?

Mars has two moons, Jupiter has 67, Saturn 62, Uranus 27, Neptune 14. But our planet Earth has just one moon. Doesn’t it?<p>Many planets in our solar …

The Sun’s Magnetic Field Is About to Reverse

Sometime in the next two or three months, something special will happen: the magnetic field that emanates from the Sun and extends throughout the …

3-D Cosmic Map Helps You Wrap Your Brain Around the Universe's Weirdness

As someone who writes about astronomy, I know that figuring out the universe is tough. There's all these weird things — dark matter, quasars, …