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From Extrasolar, Earth-like Planets to the Mysteries of Our Own World's Ancient Past
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Space Facts: Parsec & Light Year
How far is it to the stars?
"parsec" and "light year" are measures of distance very large distances.
Both distances are based at least partly on the size of
Earth's orbit about Sol (our sun).
Light year, for one, is based on the amount of time it takes Earth to make one trip in its orbit about our sun. In that amount of time, light, traveling at more than 186,000 miles per second, will have traveled exactly one light year. Read more...
Extrasolar Planets for Humanity
In search of
planets that look like Earth beyond the Solar system. It takes a certain kind of star to harbor habitable extrasolar planets.
A detailed look at interesting
star systems, some possible exoplanet stars, comparing those stars to the Solar system and to Earth.
The dream of flight, and by extension
travel to the stars, has touched the mind of humanity for centuries, perhaps even since the beginning.
stars, planets, moons, astronomy and science terms. Includes frequently asked questions about the universe.
Just for kids (and the young-at-heart): Learning about
stars, planets, galaxies, history and a whole lot more.
planet has an interesting history, some of it filled with myth and legend.
Astronomy Software Review
Tales from the imagination. New
suns, alien worlds and strange, exotic civilizations.
Colorful views of
alien planets, twin suns, binary moons, ancient ruins and bright nebulas.
3D Space software to explore the
universe, especially those stars near our own sun. Discover where the extrasolar planets are known to exist.
Galaxy City Shopping
Site Map & Links
Ancient Suns store — Space and Astronomy Books, Telescopes, Videos, Software and a universe more.
Where to find more information about
stars and planets.
For questions about
stars, planets, this website, science or anything else in the universe.
A d v e r t i s e m e n t s
V I D E O
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Thought-provoking space opera adventure awaits you.
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For the Love of Kark
The sinister Hamilton Club has licked its wounds and now has an alien ally who can destroy humanity's future. Vormin Kark may have a tiny body, but he has the resources to conquer the galaxy.
"Got it Solved" Attitude
This novel is a coming-of-age story. But Gordon Roanhorse is not just any rich man's son. His aerospace industrialist Apache father is the "Bridge Builder to the stars"—Jason Roanhorse.
A whopping 742 pages of adventure available in Kindle and trade print.
C e l e b r a t i n g t h e S p i r i t o f A d v e n t u r e"The flight was extremely normal... for the first 36 seconds then after that got very interesting." Pete Conrad, astronaut
A d v e r t i s e m e n t s
A Classic on Extrasolar Planets!
Stephen Dole of RAND Corporation and best-selling author Isaac Asimov team together to lay out the original specs for a habitable planetary system. This gave us the blueprint on what to look for.
Imagine Man Throughout the Galaxy
With a forward by Arthur C. Clarke, brazen plan for colonizing the galaxy in 8 "easy" steps. Wonderfully optimistic and beautifully detailed!