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Space Exploration
For many, it was just a successful launch like any other. But for scientists around the globe, it was a victory few dared to imagine.
Water on Mars is key for human survival on the Red Planet, not just for drinking but for growing food and making fuel and oxygen.
Even with leap years and long-term planning, our calendar won't be good forever. Here's why, and how to fix it.
A wild, compelling idea without a direct, practical test, the Multiverse is highly controversial. But its supporting pillars sure are stable.
Whether or not life exists elsewhere in the Universe, we can be assured of one thing: We are the only human beings in the cosmos.
Whether NASA likes it or not, humans eventually will be having space sex.
Life arose on Earth very early on. After a few billion years, here we are: intelligent and technologically advanced. Where's everyone else?
How can you "touch the Sun" if you've always been inside the solar corona, yet will never reach the Sun's photosphere?
A newly discovered “ultrahot Jupiter” has the shortest orbit of any known gas giant.
After decades of development, whether NASA's Webb succeeds or fails all comes down to five critical milestones that are only days away.
The same (former) NASA engineer who previously claimed to violate Newton's laws is now claiming to have made a warp bubble. He didn't.
Forget little green men: These scientists say we should be more worried about little green germs.
Our Solar System's outer reaches, and what's in them, was predicted long before the first Oort Cloud object was ever discovered.
Purely physical and chemical processes can deceive us into thinking that life is present, when it actually is not.
In 2022, the probe will crash into an asteroid while a nearby satellite captures it on camera.
No matter how controversial or politicized our world becomes, science remains humanity's best tool for figuring out how things work.
The stars, planets, and many moons are extremely round. Why don't they take other shapes?
From hellishly hot planets to water worlds, some distant planets are like nothing in our Solar System.
There are a few possible solutions to the problem of interstellar travel, but they largely remain within the realm of science fiction.
The most unique interloper into our Solar System has a natural explanation that fits perfectly — no aliens required.
Based on the atoms that they're made out of, the innermost planet should always be the densest. Here's why Earth beats Mercury, hands down.
“Should they strike, each of them has an energy at impact equal to all of the nuclear weapons on Earth combined."
But the upcoming James Webb Space Telescope compels us to add, “so far.” Beginning with its 1990 launch, NASA’s Hubble Space Telescope revolutionized our conception of the Universe. This photo of […]
How the search for alien life is taking place right here in our own Solar System. If you want to understand the origin of life in the Universe, you have three […]
The highest-energy particles of all come from space, not human-made colliders. When it comes to the most energetic particle collisions of all, you might think that the Large Hadron Collider […]
It happened more than once, and needed to. Here’s why. If there’s one thing you can be certain about when it comes to outer space, it’s that it’s transparent, not opaque, […]
Hubble, our greatest space-based observatory today, is just the beginning. The Hubble Space Telescope has been astronomy’s most revolutionary observatory in history. The stars and galaxies we see today didn’t […]
Galaxies can have regions both hotter and colder than the background radiation of the Universe. When we talk about the depths of space, we get this picture in our heads […]
Theoretically, we know what happened on the red planet. Here’s how we’ll find out whether we’re right. When it comes to the worlds beyond Earth in our Solar System, it’s only […]
We’ve already observed three cases where it’s happened. When you look at an object in space, it’s pretty easy to tell if it’s a star or a planet. Stars are […]