Aliens

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Alien Planets Revealed
Part of the Series: NOVA
It's a golden age for planet hunters: NASA's Kepler mission has identified more than 3,500 potential planets orbiting stars beyond our Sun. Some of them, like a planet called Kepler-22b, might even be able to harbor life. How did we come upon this distant planet? Combining startling animation with input…
Atmosphere
Part of the Series: The Planets
It is December 1971 and Soviet scientists are bracing themselves for an encounter with Mars at twenty-five thousand kilometres an hour. Mars 2 and 3 are their most advanced probes to date, and if all goes well they will steal for the Soviet Union the first ever pictures from the…
Seven Wonders of the Solar System
BBC
In Seven wonders of the Solar System, prepare to immerse yourself in an alien world as if you were standing there yourself. Giant ice fountains rising over 100km high; an ocean hidden beneath a frozen crust of ice; storms twice the size of Earth coloured blood red by a vortex…
Destiny
Part of the Series: The Planets
A massive red sun dominates the sky above a parched barren landscape.You could be forgiven for thinking we were on Mercury, but this is planet Earth three billion years from now. As the Sun grows to the size of a Red Giant star, its warming breath penetrates further through its…
Different Worlds
Part of the Series: The Planets
The early rocket pioneers of the inter-war years, Goddard, Korolev and Von Braun, little imagined how far their experiments would lead in a few short decades. But Mechta heralded the beginning of Man's exploration and understanding of the distant and different worlds previously glimpsed as blurred discs in the lenses…
Encounters with the Alien Other
Aliens are another icon and staple of science fiction. Often depicted as hostile and representing the unknown "other" as well as our fears about ourselves, aliens have been examined (and have examined us) in a variety of stories. Journey through the portrayal of aliens in important works by Robert A.…
Chasing Pluto
Part of the Series: NOVA
On July 14, 2015, the New Horizons spacecraft, one of the most advanced ever built, is scheduled to fly by Pluto to take the very first detailed images of the dwarf planet. After nine years and 3 billion miles, we will finally get a close look at this strange, icy…
Terra Firma
Part of the Series: The Planets
An orange glow roars from Mariner 9's booster rocket placing it in orbit around Mars. Beneath the scrutiny of its camera lens lay the largest volcano in the Solar System and canyons deep enough to swallow the Alps.The Red Planet bore the scars of violent volcanic eruptions blistering its ancient…
Super-Earths or Mini-Neptunes?
Learn how a sensitive new instrument led the way in finding planets smaller than the Jupiter-sized giants that dominated the earliest exoplanetary discoveries. Halfway in size between Earth and Neptune, these worlds have uncertain properties. For clues about their nature, consider how our solar system formed.
The Search for Exoplanets: What Astronomers Know
As recently as 1990, it seemed plausible that the solar system was a unique phenomenon in our galaxy. Thanks to advances in technology and clever new uses of existing data, now we know that planetary systems and possibly even a new Earth can be found throughout galaxies near and far.…
Journey of the Universe - An Epic Story of Cosmic, Earth and Human Transformation
One day on a Greek island, and your view of the universe will change forever... Ask acclaimed author and evolutionary philosopher Brian Thomas Swimme about our role as humans in this awe-inspiring universe, and his insights will light up the night skies. As our host, co-writer, and fellow traveler, he…
What Are Tides? Earth and Beyond
Trace the origin of tides to the simple fact that gravity varies from point to point in space. This leads not just to the rise and fall of the ocean, but to the gradual slowing of Earth's rotation, Saturn's spectacular ring system, volcanoes on Jupiter's moon Io, and many other…