Earth's orbit is getting crowded with junk. And that's becoming a major problem. Starting with Sputnik I in 1957, humanity has sent up nearly 17,000 satellites. Around 11,500 of them are still there, ...

On July 8, 1962, the United States detonated a 1.4-megaton nuclear weapon 400 kilometers above the Pacific Ocean. The Starfish Prime test created an artificial aurora visible from Hawaii, nearly 900 ...

In the 1960s, as the world watched the "Space Race" , global leaders realised the vacuum of space could easily become a new arena for war to prevent this, the Outer Space Treaty (OST) was signed in ...

Some materials used in aerospace applications such as polymers can degrade and erode with prolonged exposure to atomic oxygen, ultraviolet radiation, and extreme temperature cycling in the outer space ...

The first man to ever take steps outside the confines of the spacecraft was Soviet cosmonaut Alexei Leonov on March 18, 1965. What at first seemed like a victory in the highly competitive Space Race ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

Lower gravity. Higher radiation. No ER access. These are just a few of the challenges that humans face in outer space. Emily and Regina talk to a NASA astronaut (and astronaut scientist) about the ...

(via PBS Space Time) Did you know that many of us have up to 4% neanderthal DNA? And that 100% of your DNA may come from outer space? No joke. The biochemistry that defined the coding system of your ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth’s molten outer core is critical to life on our planet. Churning some 2,900 kilometers beneath the surface, it’s a vast “sea” ...