Compared to Earth, Mars is small, cold, dry, and lifeless. But 3.4 billion years ago, a killer asteroid caused a Martian megatsunami.
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Human beings are tiny creatures compared to the 92 billion light-year wide observable Universe. How can we comprehend such large scales?
Time gets a little strange as you approach the speed of light.
The TRAPPIST-1 system is a treasure trove of possibilities and questions. Observations by JWST have just begun.
Across all wavelengths of light, the Sun is brighter than the Moon. Until we went to the highest energies and saw a gamma-ray surprise.
We have long thought that Pluto was completely frozen solid, but the discovery of cryovolcanoes challenges that assumption.
A new study shows that the Bernardinelli-Bernstein Comet is much larger than previously thought — potentially the largest ever spotted.
From hellishly hot planets to water worlds, some distant planets are like nothing in our Solar System.
The search for worlds outside our solar system has just turned up a planet, TOI-2257 b, with a truly extreme orbit.
Asteroid collisions aren’t always bad.
On Earth, carbon can form millions of compounds, while silicon is largely stuck inside rocks. But elsewhere, silicon could form the basis of life.
The Solar System isn’t a vortex, but rather the sum of all our great cosmic motions. Here’s how we move through space.
There’s an extremely good chance that there is, or at least was, life on Mars. But is it native to Mars, or did it originate from Earth?
Total eclipses are a product of a strange and almost eerie cosmic coincidence — one that makes Earth an even rarer world in the galaxy and, by proxy, in the Universe.
If there are human-sized creatures walking around on other planets, would we be able to view them directly?
The Universe gravitates so that normal matter and General Relativity alone can’t explain it. Here’s why dark matter beats modified gravity.
Scientists may have detected the somewhat smelly chemical dimethyl sulfide on a planet 120 light-years from Earth.
Each of our three nearest stars might have an Earth-like planet in orbit around it. Here’s what we’ll learn when we finally observe it.
There’s a limit to how large planets can be, and it’s only about double the radius of Jupiter. At least, so far.
The odds are slim, but the consequences would be devastating. Here’s what would happen, plus how to avoid it.
Leading a scientific revolution is easy: you just have to succeed where the current theory fails while equaling its successes. Good luck!
There are billions of potentially inhabited planets in the Milky Way alone. Here’s how NASA will at last discover and measure them.
Although we still don’t know the question, we know that the answer to life, the Universe, and everything is 42. Here are 5 possibilities.
The Universe begins with negligible amounts of angular momentum, which is always conserved. So why do planets, stars, and galaxies all spin?
Recasting the iconic Carrington Event as just one of many superstorms in Earth’s past, scientists reveal the potential for even more massive eruptions from the sun.
“I hope we take a mindset where we are willing to look for weird life in weird places.”
NASA is creating a planet habitability index, and Earth may not be at the top. With our current data, ranking habitability is guesswork.
Meanwhile meteorite hunters rushed to Berlin to find this most rare space rock.
“The surface is no longer a record of every impact the moon has ever had, because at some point, impacts were erasing previous impacts.”
Over 50 years since humans last walked on the Moon, astronaut footprints and rover tracks are still visible. But they won’t last forever.