Invisible Universe Revealed

Category: Astronomy
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Follow the historic rescue of Hubble—the space telescope that unveiled the cosmos.

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First Stars

Look up at the night sky, and you see countless shining stars. Our galaxy has 100 billion of them. Astronomers are now hunting for clues that will reveal "the first star" that transformed the ancient universe and led to the creation of everything that followed: galaxies, planets and life itself.

6Cosmic Front • 2014 • Astronomy

The Hunt for Dark Matter

CERN and the University of California-Santa Barbara are collaborating in the search for the elusive substance that physicists and astronomers believe holds the universe together -- dark matter. Where is this search now in the realm of particle physics and what comes next?

2017 • Astronomy

The Long Astronomical Perspective

Carl Sagan talks about our future and the exploration of space

7/10The Sagan Series • 1989 • Astronomy

The Space Shuttle - A Horizon Guide

It was 30 years ago that the first space shuttle, Columbia, was launched. It was such a triumph of technology, engineering and organization that it's easy to forget the programme was primarily the product of an economy drive. The disposable Apollo missions had cost billions. A reusable craft was deemed more expedient.

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The Astronauts

When Mars One invited citizens to journey to Mars, 200,000 people applied. The final 100 include a military jet pilot, an ER doctor, and an IT consultant -- all willing to leave their loved ones forever. They share a common dream -- and a willingness to endure almost unimaginable isolation.

2/5Destination Mars • 2015 • Astronomy

Time Bombs

Planets, moons and stars can all face violent upheaval at any moment. Is it possible to predict when Mother Nature will strike?

S2E5Extreme UniverseAstronomy