|
 |
|
From Wikipedia, the free encyclopedia
Astronomy (Greek: αστρονομία = άστρον + νόμος, astronomia = astron + nomos, literally, "law of the stars") is the science of celestial objects (e.g., stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (e.g., auroras and cosmic background radiation). It is concerned with the evolution, physics, chemistry, and motion of celestial objects, as well as the formation and development of the universe.
Astronomy is one of the oldest sciences. Astronomers of early civilizations performed methodical observations of the night sky, and astronomical artifacts have been found from much earlier periods. However, it required the invention of the telescope before astronomy developed into a modern science.
Since the 20th century, the field of professional astronomy has split into observational astronomy and theoretical astrophysics. Observational astronomy is concerned with acquiring data, which involves building and maintaining instruments, as well as processing the results. Theoretical astrophysics is concerned with ascertaining the observational implications of computer or analytic models. The two fields complement each other, with theoretical astronomy seeking to explain the observational results. Astronomical observations can be used to test fundamental theories in physics, such as general relativity.
Historically, amateur astronomers have contributed to many important astronomical discoveries, and astronomy is one of the few sciences where amateurs can still play an active role, especially in the discovery and observation of transient phenomena.
Modern astronomy is not to be confused with astrology, the belief system that claims human affairs are correlated with the positions of celestial objects. Although the two fields share a common origin, most thinkers in both fields believe they are now distinct.
Source: http://en.wikipedia.org/wiki/Astronomy |
|
| |
| Antiques |
Antique Furnitures |
| Archaeology |
Art and Craft |
| Astronomy |
Construction and maintenance |
| Earth Sciences |
Genealogy |
| History |
Restoration Services |
| Education |
Museum |
| Vintage Automobiles |
Remodeling |
| Historic Preservation |
Trenchless Technology |
| Damage restoration |
Restoration Estimates |
| Museum Restoration Estimates |
|
|
|
|
|
| |
**DISCLAIMER:
The Internet links to other sites provided by HeritageRestorers.com are owned and operated by third party vendors and other third parties (External Sites).
HeritageRestorers.com is not responsible for the availability of, or the content located on or through, any External Site. You should contact the site administrator or Webmaster for those External Sites if you have any concerns regarding such links or the content located on such External Sites.
HeritageRestorers.com has no control over External Sites and resources, and is not responsible for the availability of such External Sites or resources, and does not endorse and is not responsible or liable for any Content, advertising, products, or other materials on or available from such sites or resources.
HeritageRestorers.com shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such Content, goods or services available on or through any such site or resource.
|
|
