## Celestial sphere |

In **celestial sphere** is an

The celestial sphere is a practical tool for

- introduction
- celestial coordinate systems
- history
- star globe
- bodies other than earth
- see also
- notes
- references
- external links

Because ^{[1]}
which

The celestial sphere can be considered to be ^{[2]}
All parallel ^{[3]}
(a "vanishing circle").

Conversely, observers looking toward the same point on an infinite-radius celestial sphere will be looking along parallel lines, and observers looking toward the same great circle, along parallel planes. On an infinite-radius celestial sphere, all observers see the same things in the same direction.

For some objects, this is over-simplified. Objects which are relatively near to the observer (for instance, the ^{[4]}

In this way,

The celestial sphere can thus be thought of as a kind of astronomical * Astronomical Almanac* for 2010 lists the apparent geocentric position of the

For applications requiring precision (e.g. calculating the shadow path of an *Almanac* gives formulae and methods for calculating the *topocentric* coordinates, that is, as seen from a particular place on the Earth's surface, based on the geocentric position.^{[5]} This greatly abbreviates the amount of detail necessary in such almanacs, as each observer can handle their own specific circumstances.

Other Languages

العربية: قبة سماوية

asturianu: Esfera celeste

বাংলা: খ-গোলক

Bân-lâm-gú: Thian-kiû

беларуская: Нябесная сфера

беларуская (тарашкевіца): Нябесная сфэра

български: Небесна сфера

català: Esfera celeste

čeština: Nebeská sféra

dansk: Himmelkuglen

Deutsch: Himmelskugel

eesti: Taevasfäär

Ελληνικά: Ουράνια σφαίρα

español: Esfera celeste

Esperanto: Ĉielosfero

euskara: Zeru-esfera

فارسی: کره آسمان

français: Sphère céleste

Gaeilge: Sféar neamhaí

galego: Esfera celeste

한국어: 천구

հայերեն: Երկնոլորտ

हिन्दी: खगोलीय गोला

hrvatski: Nebeska sfera

Ido: Cielala sfero

Bahasa Indonesia: Bola langit

italiano: Sfera celeste

עברית: כיפת השמים

ಕನ್ನಡ: ಖಗೋಳ

ქართული: ცის სფერო

қазақша: Аспан меридианы

Latina: Sphaera caelestis

latviešu: Debess sfēra

Lëtzebuergesch: Himmelskugel

lietuvių: Dangaus sfera

македонски: Небесна сфера

മലയാളം: ഖഗോളം

Malti: Sfera ċelesti

Bahasa Melayu: Sfera cakerawala

Nederlands: Hemelbol

日本語: 天球

norsk: Himmelhvelving

norsk nynorsk: Himmelkvelving

occitan: Esfèra celèsta

oʻzbekcha/ўзбекча: Osmon sferasi

polski: Sfera niebieska

português: Esfera celeste

română: Sferă cerească

русский: Небесная сфера

Scots: Celestial sphere

Simple English: Celestial sphere

slovenčina: Nebeská sféra

slovenščina: Nebesna krogla

српски / srpski: Небеска сфера

srpskohrvatski / српскохрватски: Nebeska sfera

suomi: Taivaanpallo

svenska: Himmelssfären

Tagalog: Panlangit na timbulog

தமிழ்: வானக்கோளம்

татарча/tatarça: Күк йөзе

ไทย: ทรงกลมฟ้า

Türkçe: Gökküre

українська: Небесна сфера

اردو: کرہ سماوی

Tiếng Việt: Thiên cầu

中文: 天球