Everything about space and the universe
Dont Know Much About the Universe: Everything You Need to Know About Outer Space but Never Learned by Kenneth C. DavisWho dug those canals on Mars? What was the biblical Star of Bethlehem? Were the pyramids built by extraterrestrials?
From the ancients who charted the heavens to Star Trek, The X-Files, and Apollo 13, outer space has intrigued people through the ages. Yet most of us look up at the night sky and feel totally in the dark when it comes to the basic facts about the universe.
Kenneth C. Davis steps into that void with a lively and readable guide to the discoveries, theories, and real people who have shed light on the mysteries and wonders of the cosmos. Discover why Einstein was such a genius, the truth behind a blue moon or two, the amazing secrets of Stonehenge, and even how one great astronomer lost his nose.
With the fun question-and-answer format that has appealed to the millions of readers of his bestselling Dont Much About® series, youll be taking off on an exciting armchair exploration of the solar system, the Milky Way, and beyond.
50 Surprising Facts About Space You Didn't Know
All rights reserved. Galaxies are sprawling systems of dust, gas, dark matter , and anywhere from a million to a trillion stars that are held together by gravity. Nearly all large galaxies are thought to also contain supermassive black holes at their centers. The deeper we look into the cosmos, the more galaxies we see. One study estimated that the observable universe contains two trillion—or two million million—galaxies. Some of those distant systems are similar to our own Milky Way galaxy, while others are quite different. Since it is so far from us, it takes light from Andromeda more than 2.
The Universe is all of space and time [a] and their contents,  including planets , stars , galaxies , and all other forms of matter and energy.
importance of education in pakistan
Some galaxies are similar to the Milky Way, but some are quite different.
Ask an Expert. From the infinite curiousity you feel scanning the skies on a starry night to your plans for terraforming on Mars, there are questions on space, the universe and everything astronomical. Is there anybody out there?
Gliese b is a Neptune-sized exoplanet located about 33 light-years away in the constellation Leo. The source of this odor could be byproduct from dying stars, the traces of which can be found throughout the universe. About 10, light-years away in the constellation Aquila, there is a cloud of alcohol with a diameter 1, times larger than our solar system. The amount of ethyl alcohol present in the cloud could serve up to septillion , followed by 24 additional zeros drinks. The Andromeda galaxy is our closest galactic neighbor, roughly 2. Black holes are formed when some very large stars collapse and condense all of their mass into a very small area, known as the Schwarzschild radius. For a person to become a black hole, they would have to be compressed smaller than a proton.