Signs in Context

There is an invisible force that keeps us on the ground, and stops us from floating off into space. Gravity shapes our universe, and in this video we explore why gravity would let you jump long distances on the moon, but would swallow you into the planet on Jupiter. 

Light travels through space at about 300,000 km per second, so it can take years for the light of distance stars to reach Earth. When you look at the stars, you're really looking back in time. From the closest stars to the most distant galaxies, we explain light-years and explore the journey of starlight in Irish Sign Language. 

Earth's moon is around four and a half billion years old. In that time, it has been hit by countless meteors and asteroids. In this video, find out why they haven't worn away over time.

Learn how to replicate the surface of the moon using common kitchen ingredients in this demonstration of how to make your own lunar craters. You'll need a tray, a sieve, flour, sprinkles, cocoa, and some small rocks.

In a special news and weather report from Jupiter, we learn about weather on the gas giant, including the Great Red Spot - a gigantic, high-pressure, ancient storm, bigger than planet Earth.