This video is chapter 5 in my series on special relativity, and it covers how things that are moving (that is, moving relative to an inertial reference frame) at different speeds appear to be shorter in length... and longer in length....

Astronomers discovered something cool about an object in the asteroid belt (2006 VW139/288P), and the European Space Agency is conducting a bed rest study that could help us get on our way to Mars.

This week on SciShow Space News, astronauts had to take the scenic route to the ISS because of some space debris. And this month, you might get to see two eclipses: a solar eclipse, and a rare supermoon eclipse.

Venus is too hot, Mars is too cold, and Earth is just right, says planetary scientist Dave Brain. But why? In this pleasantly humorous talk, Brain explores the fascinating science behind what it takes for a planet to host life -- and why...

The first time scientists found exoplanets, they were orbiting something very different from our sun: a pulsar.

The global dust storm on Mars is threatening the Opportunity rover and the wind on Venus might be changing the length of its days.

The first American astronaut to orbit Earth, John Glenn passed away yesterday in Ohio. But he leaves an admirable legacy.

You might think most planes look the same, but here are five of the most bizarre aircraft that, no matter their appearance, still managed to fly. Chapters SR-71 BLACKBIRD 1:20 GRUMMAN X-29 3:01 AERO SPACELINES 377PG 5:14 BOEING...

Hank fills us in on the four exploratory missions to space that he is most excited about - New Horizons is going to Pluto and the Kuiper belt; Juno is on it's way to Jupiter; Dawn is exploring two large asteroids; Rosetta will land on a...

Earlier this month, a Chinese moon rover discovered a mysterious glittery substance at the bottom of a lunar crater. How did it get there? Also, Comet NEOWISE takes thousands of years to circle the Sun, and right now we can see it in our...

Scientists first saw patches of ice on Mercury 20 years ago, and that discovery raised a lot of questions: How could ice survive on one of the solar system’s hottest planets, and how did it get there in the first place?

Life makes our planet an incredibly exotic place compared to the rest of the known universe, says astrobiologist Betül Kaçar, whose research uses statistics and mathematical models to simulate ancient environments and gather insights...

Guest narrator Sean Carroll of Caltech describes dark energy and the acceleration of the universe, the discovery of which was awarded the 2011 Nobel Prize in Physics on October 4th.

There’s nothing boring about Bennu! From its chemistry, size, shape, and spin to its extremely old age, it proves that even the smallest objects in the solar system have a bizarre and fascinating history.

When astronomers study the universe, they’re often using telescopes that cost millions or even billions of dollars to build. Luckily for the rest of us, there are still plenty of incredible things to see in the sky with the more...

Tabby's star is at it again. Could it be aliens this time!? Also, astronomers have discovered a planet with the density of styrofoam!

Researchers found surprising new evidence hiding in data captured back in 1997, and we've discovered stars forming in a distant galaxy as early as 250 million years after the Big Bang.

Back in 2014, an international team of astronomers was taking pictures of distant galaxies, when they noticed a dot moving across their images. Could it be Planet Nine?

SciShow Space shares the latest news from space research, including the first definitive detection of water on an exoplanet, and a new theory for how we should search for alien civilizations.

The big question in the comments last week was, "BUT WHAT ABOUT ECLIPSES?" Today, Phil breaks 'em down for you.

How scientifically accurate is your favorite sci-fi space battle?

Okay, going to Mars is going to be expensive. Not only that, but who we choose to pick on that trip also needs to have the statistically lowest chance of perishing. So it might be the case that our best scenario is all female crew!

Jay Walker, curator of the Library of Human Imagination, conducts a surprising show-and-tell session highlighting a few of the intriguing artifacts that backdropped the 2008 TED stage.

Africa needs engineers, but its engineering students often end up working at auditing firms and banks. Why? Kamau Gachigi suspects it's because they don't have the spaces and materials needed to test their ideas and start businesses. To...