arts 481
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- informations and media 16
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- performing arts 17
- portals 2
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- associations 4
- literature 21
- cartoons 14
- applied arts 140
- cinema 14

data processing 49
- Internet 1
- robotics 1
- programming 5
- software 8
- multi-media 3
- images 8
- formation 1
- freeware 1
- informations and media 6
- artificial intelligence 9
- associations and clubs 1
- numerical imagery 1
- material 2
- parallel calculation 1
- discussions 1

house 71
- garden 8
- cook 23
- do-it-yourself 7
- guides 1
- information for the consumers 8
- decoration 15
- informations and medias 9

games 47
- wargames 1
- games 15
- card games 7
- Internet 9
- gambling 2
- video games 12
- games of address 1

company 89
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- life styles 20
- relations 1
- paranormal 2
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- associations and organizations 5
- work 17
- nature and environment 5
- soldier 1
- institutions and administrations 4
- illiteracy 1
- people 4
- criminality 1
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- religion and spirituality 8
- alternative cultures 13

sciences 110
- software 4
- agriculture 13
- sciences of the ground 1
- alternatives 1
- biology 8
- conferences 1
- astronomy 3
- chemistry 4
- physics 1
- environment 8
- research centers 2
- technology 23
- institutions 2
- teaching and formation 9
- social sciences 12
- science and company 6
- informations and medias 7
- methods and techniques 5

sports 166
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- watery 2
- handicaps 1
- shooting 1
- mountain 1
- fights 2
- extremes 9
- balls 12
- martial arts 3
- air 43
- shoes 3
- slide 1
- athletics 2
- events 11
- drive 30
- informations and medias 11
- teaching and formation 2
- mechanics 13
- fish 4
- cycling 13

leisures 301
- pets 122
- humour 13
- evaluation of photographs 10
- collections 20
- hobbies 68
- scouting 1
- alive history 41
- trains and railroads 1
- kites 1
- celebrities 24

tourism 102
- travel 63
- naturism 12
- amusement parks 15
- roads and motorways 1
- holiday camps 7
- lodging and restoration 4

shops on line 88
- entertainment 5
- sports 2
- gastronomy and food 1
- arts 3
- retailers 4
- animals 22
- jewellery and clock industry 4
- wholesalers 2
- classifieds 2
- electronics 5
- flowers and plants 1
- office supplies 1
- automobiles 12
- gifts 3
- health 4
- music 1
- house and garden 1
- clothing 9
- auction sales 5
- regional products 1

formation 59
- associations 22
- guides 4
- resources 7
- disciplines 3
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- elementary teaching 3

news 265
- weblogs 78
- weather 2
- newspapers 9
- radio 6
- journalism 10
- at the top 21
- by topic 18
- information traffic 10
- magazines and E zines 10
- television 6
- alternative media 95

references 84
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- languages 5
- files 8
- standards 4
- bibliography 31
- knowledge management 22
- flags 1
- dictionaries 2
- museums 1
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internet 139
- website creation 28
- search engine and directory 22
- tools webmaster 25
- promotion and affiliation 64

adult 57
- weblogs 15
- other 11
- gay 12
- amateurs 16
- hetero hard 1
- dating 2

sciences astronomy

GeoDirectory

Speed of light

Speed of light *

From general relativity we know that only in local inertial frames does the measured speed of light equals the nominal speed of light (299792.458km/sec).

Astronomy in service of islam

Astronomy in service of islam

Moonsighting, islamic calendar, prayer times, and qibla direction

Wcs - the home of webcamscheinern

Wcs - the home of webcamscheinern

Wcs is a software for fast polaralignment of astronomical mounts. you nail your alignment within 20 minutes!