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Astronomy class
Pilihan Ganda
1. a. Ilmu alam yang mempelajari berbagai sisi dari pembentukan dan perkembangan alam semesta.
2. c. Observasional dan Teoretis.
3. a. sekitar 1.392.500 km
4. a. 150 g/cm.
5. a. Korona, kromosfer, fotosfer, dan lapisan inti.
6. b. Mars, Jupiter, Saturnus, Uranus, dan Neptunus.
7. b. Uranus.
8. a. Neptunus
9. c. Benda-benda langit berukuran kecil yang melayang-layang di angkasa dan tidak mempunyai lintasan.
10. Komet Halley.
Essay
1.Astronomi berarti ilmu bintang. Astronomi merupakan ilmu alam yang mempelajari sisi dari pembentukan dan perkembangan alam semesta.
2. Benda-benda langit:
a. bintang : benda langit yang dapat memancarkan cahayanya sendiri
b. satelit : benda langit yang mengelilingi sebuah planet dan ikut mengikuti planet tersebut yang beevolusi mengelilingi matahari
c. asteroid :Benda langit yang merupakan sisa ari sebuah ledakan besar
d. meteorid : benda langit yang mengambang tanpa memiliki lintasan orbit.
e. komet : benda langit yang berbentuk bola pijar berekor yang memiliki lintasan tertentu.
3. Tata surya adalah kumpulan benda langit seperti planet, bintang, satelit, komet dll yang berporos pada matahari.
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