Space's Deepest Secrets

Upptäcksresande riskerar sina karriärer, och till och med deras liv, för att visa mänskligheten nya världar som aldrig tidigare skådats.

World scientists are searching for Dark Energy, the biggest challenge of physics; In Europe, a multi-billion dollar satellite will map the sky from space.

An exploration of the technology needed to survive the end of the world and the options for colonizing and starting over on a new planet.

Using 3D graphics to explore the icy wastes of Europa and the vast prehistoric oceans of Mars.

Thirty-five years after leaving Earth, the Voyager spacecraft is going to leave the Solar System to tell the incredible story of a mission that was only supposed to last five years but is still going today.

The story of how a large aerospace company, BAE Systems, started a secret project to counter the force of gravity while NASA simultaneously ran a similar Breakthrough Propulsion Physics program.

Millions of pieces of junk from old satellites and space missions orbit Earth; a clean-up effort by the U.S. government and others clears the path for future space travel.

A team of scientists search the universe to find the oldest stars, born just after the Big Bang.

When the sun flares up, billions of tons of superheated gas and intense radiation are propelled toward Earth; experts are trying to predict what is coming toward the Earth and how to prepare for this threat.

An in-depth look at how NASA is preparing for its most ambitious and dangerous mission yet: to land a human being on the surface of Mars.