Further down on this page you can locate the different categories on our site. You can also find the latest additions the links further down on this page.
|UK weather warning: east coast braced for floods - live updates|
|State pension age to be raised to 70 for today's young workers|
|Car tax discs to be abolished|
|Yemen car bomb and gun battle kill at least 20|
|Snowden documents show NSA gathering 5bn cell phone records daily|
|Bid to save pilot whales stranded in shallow waters in Florida Everglades|
|Ashes: Australia v England – as it happened | Andy Bull, Geoff Lemon and John Ashdown|
|Thailand peaceful for king's birthday|
|Joe Biden: blunt talks held with Chinese leadership on disputed air zone|
|Judges to rule on naming Royal Marine convicted of killing Afghan insurgent|
|Patients growing into face transplants|
|Toronto mayor Rob Ford 'offered $5k and car' in exchange for crack video|
|Mexican authorities find stolen lorry containing radioactive material|
|David Cameron urges British students to ditch French and learn Mandarin|
|American Hustle – review | Peter Bradshaw|
|Brazil plans 'World Cup courts'|
|Nigella Lawson: I've taken cocaine|
|Manchester United v Everton – as it happened | Daniel Harris|
Astronomy is one of the oldest sciences. Prehistoric cultures left behind astronomical artifacts such as the Egyptian monuments, Nubian monuments and Stonehenge, and early civilizations such as the Babylonians, Greeks, Chinese, Indians, Iranians and Maya performed methodical observations of the night sky.
However, the invention of the telescope was required before astronomy was able to develop into a modern science. Historically, astronomy has included disciplines as diverse as astrometry, celestial navigation, observational astronomy, the making of calendars, and astrology, but professional astronomy is nowadays often considered to be synonymous with astrophysics. During the 20th century, the field of professional astronomy split into observational and theoretical branches.
Observational astronomy is focused on acquiring data from observations of celestial objects, which is then analyzed using basic principles of physics. Theoretical astronomy is oriented towards the development of computer or analytical models to describe astronomical objects and phenomena. The two fields complement each other, with theoretical astronomy seeking to explain the observational results, and observations being used to confirm theoretical results.