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ASTRONOMY ㅡ G1-G3
Betelgeuse.
Bintang raksasa paling terang kedua di rasi Orion, disebut juga bintang kanibal. Kanibal: diduga melahap bintang didekatnya yg lebih beaar dan berotasi cepat.
Betelgeuse: Bait al-Jauzā(arab): Rumah sang Raksasa.
Jaraknya dekat dgn bumi, sekitar 640 tahun cahaya. Betelgeuse dapat mengeluarkan sendawa kosmik yg dpt meledakkan awan puing2 ke angkasa dgn kecepatan 36.000 km/jam.
Bintang berusia 10 juta tahun ini (tua) diperkirakan mati dalam waktu dekat dan meledak lalu menghasilkan bintang muda. Tubuhnya makin besar, suhunya menurun adalah tanda sebuah bintang akan menuju kematian.
Betelgeuse memiliki massa 15-25kali lebih besar dari matahari. Luas permukaannya telah lebih dari 1,38 juta km.
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