Gravitation

On March 5, the audience of the next Ratio event will learn more about one of the most important physical discoveries in the last century - gravitational waves

US space agency NASA believes it can put humans on Mars within 25 years but the technological and medical hurdles are immense, reported Aljazeera.

Deadly radiation from the cosmos, potential vision loss, and atrophying bones are just some of the challenges scientists must overcome before any future astronaut can set foot on the Red Planet, top NASA officials said on Tuesday.

What you’re looking at is not a production set photo from Gravity, but rather a training simulation for Canadian Space Agency astronaut Jeremy Hansen. He’s suspended over a mockup of the International Space Station (ISS), while attached to the Active Response Gravity Offload System (ARGOS) at NASA’s Johnson Space Center in Houston, Texas.

In a landmark discovery for physics and astronomy, international scientists said on Feb. 11 they have glimpsed the first direct evidence of gravitational waves, or ripples in space-time, which Albert Einstein predicted a century ago.