Is it saying too much to say something doesn’t exist when you have no evidence either way?
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If we were in a place like the Coma Cluster instead of the Local Group, we’d already be dead. In a living spiral galaxy, like the Milky Way, the rich gas […]
Can radiation in space limit human exploration? It’s a real challenge, explains NASA’s Michelle Thaller.
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Our Universe is full of surprises. This latest one, AT2018cow, has ignited a controversy between astronomers. The Universe is an ever-changing place, particularly if you look at it on long-enough […]
We’ve all heard the number: 4.5 billion years. But how do we know, and how certain are we that the Earth and Sun are the same age? Billions of years ago, […]
You’ve probably seen it hanging around. But how did it get there? And can we live there?
The brightest galaxies of all neither have the most stars nor the biggest black holes. Here’s how to solve the mystery. With some 400 billion stars burning steadily, the Milky Way […]
Sometimes, the biggest answers to the deepest questions come in the most unexpected of places. In the Solar System, anything out past Neptune is generally considered to be the outer reaches […]
She met mere mortals with and without the Vatican’s approval.
NASA research finds a new direction in searching for signs of life in the Universe.
Breakthrough Starshot is moving ahead with an audacious vision for space exploration.
It’s very different from the colloquial meanings of “true-and-false” or “right-and-wrong.” In many ways, the human endeavor of science is the ultimate pursuit of truth. By asking the natural world […]
Multi-messenger astronomy further widens our window to the universe.
Physicists sure do give counterintuitive names to the things they find. Most of us are confounded by the idea of relativity when we first encounter it. Objects don’t just move through […]
How ‘special’ are we for life to have survived and thrived the way it did? While there are hundreds of billions of stars in our galaxy, many with Earth-sized planets at […]
Time to build a Corellian shipyard?
While nothing is ever certain about the future, here are 10 great achievements you can bet on. Every year, unexpected scientific discoveries challenge what we know. Observations using the Atacama Large […]
Bright pink? Lava? Liquid planets that could hold water? Some far-out planets are truly… out of this world.
Was it a real thing? And the Wise Men? Or are they just myths?
Just because humans wouldn’t do well over there doesn’t mean there aren’t incredible chances for life. For nearly 30 years, scientists have been discovering planets beyond our Solar System: the exoplanets […]
The line between science and pseudoscience is imperceptible to most. Here’s how you can catch it in yourself. When it comes to science, the first principle is that you must […]
There really is a cosmic conundrum about how fast the Universe is expanding. Changing its age won’t help. One of the most surprising and interesting discoveries of the 21st century is […]
“Earth orbits the Sun in a shooting gallery.” — Neil deGrasse Tyson
We’re taught that the most massive stars in the Universe all die in supernovae. We were taught wrong. Create a star that’s massive enough, and it won’t go out with a […]
The other great spiral galaxy in the local group demonstrates why we’re #2, even in our own backyard. The Milky Way is our cosmic home, containing hundreds of billions of […]
There aren’t any holes in the Universe at all. What actually exists is far more interesting. Somewhere, far away, if you believe what you read, there’s a hole in the […]
A new study published in the Astrophysical Journal Letters provides even more reason to think Ross 128 b, the second closest exoplanet to Earth, could harbor life.
The Swift-Tuttle comet is the source of the lovely Perseid meteor shower each August. It’s also getting closer and closer, making it “the single most dangerous object known to humanity.”
A very clever idea says there’s a ninth Solar System planet, larger than Earth, far beyond Neptune. Here’s why most scientists think it’s not real. It’s been nearly three years since […]
Some galaxies might not have any dark matter. Here’s why you should care. There are two assumptions that everyone makes about the Universe for extremely good reasons, but they might not […]