The Moon has been one of the most important theoretical stepping stones to our understanding of the universe. We’ve long understood that it could also be our literal stepping stone: humanity’s first destination beyond our atmosphere.

If all goes well, we'll be sending astronauts back to the Moon in just a couple of years. And scientists have a lot to figure out before then, including the answer to a seemingly simple question: What time is it up there? Hosted by:...

In November 2023, NASA's Lucy spacecraft flew by the asteroid Dinkinesh and made a startling discovery: not only does this small asteroid have an even smaller companion (named Selam), that companion is shaped like a two-tier snowman....

In 2020, students from the University of Texas proposed sending a fleet of rovers to the Moon that, for a price, would carve words and symbols into the surface for *you*, random human. And that got us thinking, how big would such a...

This October, the launch window opens for NASA's Europa Clipper mission. When it arrives in the Jovian system, this spacecraft will probe the icy moon...and its ocean buried kilometers beneath the surface...for the ingredients of life as...

We are in the Golden Age of Solar Eclipses, but only for the moment. In fact, I'd argue we're already past peak solar eclipse and it's all downhill from here.

The moon orbits the earth once per month, which means the moon is on the sun side of the earth every month. So... "why aren't there eclipses every month?" is a question we will answer in this video!

Solar eclipses don't just happen here on earth - moons of other planets also pass between those planets and the sun, resulting in various types of solar eclipses on Mars, Jupiter, Saturn, Uranus, Neptune, and even non-planets like Pluto,...

The sun rises in the east, the moon rises in the east, and the stars rise in the east... but solar eclipses, oddly, come from the west. If total eclipses are caused by the sun and the moon, why don't they behave like the sun and the moon?

Humans eat a lot of different animals, but almost none of them are carnivores - why?

Solar eclipses can happen anywhere on earth, but if you want to see a total eclipse, you need to go to the far north, because the Earth’s shape and orbit determine the high latitudes and eclipse hotspot.

New possibilities for storytelling are emerging faster than at any other time in history, says film producer Mark Grimmer. With an immersive approach to art exhibitions, he shares several multidisciplinary projects — including a...

Why The Full Moon is Better in Winter

What else did we leave on the moon? Smarter Every Day explains

How Do Greenhouse Gases Actually Work?

The moon may be 1.3 light-seconds away, but why on earth do we measure distances using time?

How Big Is The Sun?

What if you thought the earth was flat? And then you found out it isn't?

How do we know what the air is like on planets we haven't visited? This video explains how to see air from 150 light years away. Thanks to NASA's James Webb Space Telescope project at the Space Telescope Science Institute for supporting...

Guns in Space

Welcome to the "Auntieverse" — a surreal tribute to "auntie culture" by artist Niceaunties, inspired by the spirit of the women who care for each other and their families. From sushi-bedecked cars with legs to hot tub baths full of...

There's an eclipse coming up in April of 2024! You'd think it takes a lot of modern technology for us to know about it, but it turns out that humans have been able to predict eclipses for nearly three thousand years. And we've been using...

Comets are famous for having space tails. But they're not the only ones! Asteroids, planets, and even stars can rock tails of their own.

From cyclones to snowstorms, Earth is home to some spectacular weather events. But they're nothing compared to what you can find on the other planets in our solar system. Magnetic tornadoes? Ammonia mushballs? Let's (not literally) dive...