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Спътник Естествени спътници | Изкуствени спътници | Навигация

Астрономически обекти


Космосаорбитанебесно тялогравитациямасаСлънчевата системаЗемятаСлънцетопланетазвездагравитацияЛунатакосмически апарат










Спътник


от Уикипедия, свободната енциклопедия

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Спътник в Космоса, в най-общия смисъл, се нарича обект, който е в орбита на друг обект. На практика спътникът е обект от естествен или изкуствен произход, който се намира в орбита около небесно тяло.


Основните критерии за определяне на даден обект като спътник е центърът на масите на 2 обекта, свързани чрез гравитация, да се намира във вътрешността на основното тяло. В група от обекти спътник е това тяло, което има по-малка маса. Система от 2 тела с приблизително еднакви маси се нарича двойна система и е трудно да се определи кое от телата е спътникът.


Всички тела, които са част от Слънчевата система, включително и Земята, са спътници на Слънцето или на някое друго тяло от системата.


Според произхода си спътниците се делят на естествени и изкуствени.



Естествени спътници |



 Основна статия: Естествен спътник

Естествен спътник е небесно тяло, намиращо се в орбита около друго небесно тяло (планета или звезда) и свързано към него чрез гравитация. Често тези спътници се наричат луни по името на единствения естествен спътник на Земята - Луната.



Изкуствени спътници |



 Основна статия: Изкуствен спътник

Изкуствен спътник е космически апарат в орбита около Земята или друго небесно тяло.








Взето от „https://bg.wikipedia.org/w/index.php?title=Спътник&oldid=8119997“.





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