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Astronomy
We just found the first one within 1,000 light-years of us. But there’s probably one much, much closer. For a long time, black holes were known to exist only in the […]
Is that required for detectors like LIGO and Virgo to work? Whenever any two things in the Universe interact at the same location in spacetime, one thing always remains true about […]
On the largest scales, dark matter holds the Universe together. But on small ones, it helps reveal exactly what it is… and isn’t! Dark matter is often thought of as the […]
They say that seein’ is believin’. But everything we see has to have a scientific explanation. When you look at the Sun on a day where there’s a clear sky, […]
We all share atoms with every person, living or dead, on Earth. There’s more in common among us than you might think. When you eat food, drink liquids, or even breathe […]
A generation ago, NASA launched their great observatories to explore the Universe. It’s time for round 2. Throughout the history of astronomy, every advance we’ve ever made has come about because […]
It’s 100 years since astronomy’s famous ‘great debate.’ We still haven’t learned the most compelling lesson of all. So, you’ve arrived at a crossroads: you think the world works in a […]
In both visible light and infrared, we get a preview of the spectacular advances that await the James Webb Space Telescope. What astronomers see isn’t just determined by the telescope […]
Over the past 30 years, we’ve revolutionized what we know about the Universe. But we couldn’t have done it without these lessons. On April 24, 1990, the Hubble Space Telescope rocketed […]
The dream of an ‘Earth-like’ planet showcases our astrobiological ignorance. Over the past decade, our understanding of what planets exist around stars other than our own has exploded. The number […]
Its record-holding galaxy is 32 billion light-years away, in a Universe that’s only 13.8 billion years old. On April 24, 2020, humanity celebrates the 30th anniversary of NASA’s Hubble Space Telescope. […]
In reality, it has no color at all. Here’s why. Every time you see an illustration of the COVID-19 coronavirus, it’s shown with a red color to it. Sometimes it’s red […]
How does one supernova get so bright, so energetic, and so massive? It’s a spectacular mystery to solve. On February 22, 2016, one of humanity’s automated sky-scanning telescopes — the Pan-STARRS Survey for […]
The original Hubble Deep Field truly showed us what the Universe looks like. Later this month, the Hubble Space Telescope will celebrate its 30th anniversary. This photo of the Hubble Space […]
There are three factors all competing to determine the fate of the Earth, and the one that’s winning now won’t win in the end. If you could measure the average distance […]
When you look at the Universe in an entirely new way, you sometimes find what you could never have anticipated. Almost exactly one year ago today, the Event Horizon Telescope […]
All stars will eventually die. But we’ve never seen ones die like this before. When you look up at the sky, most of the points of light we see appear to […]
In 774/775, tree rings show a spike in carbon-14 unlike anything else. At last, scientists think they know why. Every once in a while, science gives us a mystery that comes […]
We’re not made out of the densest elements, but we’re the densest planet nonetheless. Here’s why. Of all the planets, dwarf planets, moons, asteroids and more in the Solar System, only […]
On the morning of March 31, 2020, these three worlds will be at their mutual closest in 20 years. For the past few weeks, Mars, Saturn, and Jupiter have all shone […]
The center of our Sun tops out at 15 million K, but nuclear bombs can get nearly 20 times hotter. Here’s how. In terms of raw energy output, nothing on our […]
It’s not just for Earth-like planets around Sun-like stars. Not even close. Shortly after Earth first formed first formed, life quickly took hold, thriving ever since. Both reflected sunlight on a […]
It isn’t just that mass and energy are equivalent and interchangeable. It tells us something fundamental about mass itself. Of all the equations that we use to describe the Universe, perhaps […]
A year ago, a puzzling gap existed between black holes and neutron stars. With nearly a year of new data, LIGO solves the puzzle. On Monday, March 16, 2020, astrophysicist Carl […]
We’ve never found eight stars bound together in the same stable system. But nature might make it so. The Universe that we have is often more wondrous and bizarre than even […]
Today, our observable Universe extends for 46 billion light-years in all directions. But early on, things were much smaller. There are few things we can conceive of that are as mind-bogglingly […]
And if you have a friend at the same longitude, you can even measure its circumference. This year’s equinox, on March 19/20 of 2020 (longitude-dependent), is Earth’s earliest in 124 […]
Dark matter is perhaps the most mysterious substance in the Universe. What exactly it is, however, still eludes us. Dark matter is one of the most mysterious and yet most ubiquitous […]
It’s an incredibly useful approximation. But the truth takes us far deeper. Anyone who’s ever taken a physics course has learned the same myth for centuries now: that any object thrown, […]
The full Moon is always a sight worth looking at. This March, the full Worm Moon is a little more “super” than usual. The full Moon is always a spectacular sight: […]