Astronomers are closing in on the proof they've sought for years that one of the most destructive objects in the universe—a supermassive black hole—lurks at the center of our own galaxy. Could it flare up and consume our entire galactic neighborhood? Join NOVA on a mind-bending investigation into one of the most bizarre corners of cosmological science: black hole research.
If we are not alone, who or what else out there? Is anybody listening? Is physical travel from one star system to another possible?
Our technology is not sufficient to detect any intelligent life form beyond hundred-millions light years. There are over 125 billion galaxies and we may never catch any sign.
If there is a life, how will it develop? Will the mechanics of evolution be similar on the Earth?
Astronomers and scientists like Richard Dawkins explain their arguments on extraterrestrials. (www.youtube.com)
The Milky Way galaxy, the cosmic city of 200 billion stars. We live in a quiet neighborhood, but what is we could take our planet in a journey across the galaxy?
From a distance, our galaxy would look like a flat spiral, some 100,000 light years across, with pockets of gas, clouds of dust, and about 400 billion stars rotating around the galaxys center. Thick dust and blinding starlight have long obscured our vision into the mysterious inner regions of the galactic center. And yet, the clues have been piling up, that something important, something strange is going on in there. Astronomers tracking stars in the center of the galaxy have found the best proof to date that black holes exist. Now, they are shooting for the first direct image of a black hole.