How do black holes emit light?

Black Hole Accretion Disc Light Massive Color Picture Artist's Rendition Weekly Show

If there’s one thing everyone knows about black holes, it’s that they give off no light. These behemoths of time and space erase objects from history, swallowing everything in their paths. Yet a few minutes of research will tell you we can detect black holes through their radiation. In fact, black holes are supposedly some of the brightest objects in the universe. Welcome to the bizarre world of astrophysics.

First of all, your science teachers were telling the truth: black holes give off no light. As their namesake implies, these objects have grown so massive not even light can escape their gravity. If a rogue black hole flew between us and the stars, the only way to detect it would be through its gravity. Astrophysicists have shown, however, that most matter in the universe clumps together. Stars live in galaxies, and galaxies move in clusters. Black holes often live at the centers of galaxies or alongside stars throughout them.

Black Hole Accretion Disc Light Massive Color Picture Artist's Rendition Weekly Show

An artist’s rendition of an accretion disc. Scientists have yet to understand why the black hole emits particle streams on polar axes.

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Breakthough study finds remnants of Big Bang

Inflation Big Bang Expansion Image Diagram NASA Science Universe Weekly Show

The universe is a big place. Most physicists say it is infinite, and estimates of our observable universe fall around 93 billion lightyears across. Fortunately, math and science give us the tools to unravel what we cannot see, such as last week’s breakthrough discovery of the “echo” from the Big Bang.

The Big Bang theory posits the universe burst from a single point some 13.7 billion years ago. In a fraction of a second it underwent staggering expansion, growing exponentially at speeds faster than light. Early phases of the universe contained plasma so “dense” (high-energy) that photons could not escape. About 380,000 years later, the plasma cooled enough to let light push through, giving the universe its first moment of transparency. This theory is widely accepted by the scientific community and explains many properties of our universe, such as cosmic background radiation, large-scale structures, and the large presence of light elements (more on these in future posts).

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Is sex addiction real?

I know how you feel. You have a burning, insatiable desire. Nothing can satisfy it except for the one thing you want—no, desperately need. You can’t hold it in anymore, you just have to know: is sex addiction real?

Addiction, while often thrown around colloquially, is a real medical condition. According to the American Society of Addiction Medicine, “Addiction is a primary, chronic disease of brain reward, motivation, memory and related circuitry. Dysfunction in these circuits leads to characteristic biological, psychological, social and spiritual manifestations. This is reflected in an individual pathologically pursuing reward and/or relief by substance use and other behaviors.” That’s their short-definition—you can read their long definition here. (Also: how the word “spiritual” can appear in any medical definition is beyond me, but that’s for another post.). So what does this actually mean?

Sex Addiction Hypersexual Disorder Dependence True Real Weekly Show

Hide yo kids and hide yo wife. It’s a movie. About sex. But is sex addiction a real thing?

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Stephen Hawking: there are no black holes

Black Hole Artist's Impression Astronaut Falling Into Tidal Forces Firewall Hawking Weekly Show Stephen

Famed physicist Stephen Hawking announced last week there are no black holes—at least not the way we think of them. His new, not-yet-peer-reviewed paper says the idea of an event horizon—the point of no escape—violates quantum mechanics and therefore does not exist. In doing away with the event horizon, Hawking claims to have solved the firewall paradox, one of the most pressing problems in modern physics.

First, some background. Stephen Hawking is a theoretical physicist and cosmologist and the Director of Research at the Centre for Theoretical Cosmology at Cambridge University. His work in quantum mechanics and general relativity is a cornerstone of modern physics and has made him one of the most famous scientists of the past century.

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How Earth destroyed the ninth planet

When NASA scientists began to analyze samples from the moon landing in 1960, they discovered something fascinating. The moon rocks the team had brought back resembled the rocks and dust on Earth. In fact, aside from lower water and iron content, the moon’s chemical composition was almost identical to the Earth’s. This was huge.

In case this does not seem significant, let’s get some perspective on the matter. The moon is without a doubt the most studied astronomical body in history, but by the end of the nineteenth century, scientists still had no idea how it got there. Theories had ranged from the plausible (the Earth and the moon formed together) to the farfetched (the Earth used to have a really big atmosphere and was able to capture a rogue, pre-formed moon), but further scrutiny uncovered holes in them all. By 1900, the predominant though mathematically questionable explanation involved centrifugal force from a fast-spinning Earth throwing off material that coalesced into the satellite.

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