MATAHARI

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Selasa, 13-12-2011 06:51

MATAHARI Matahari adalah subuah Bintang yg sampai saat ini masih aktif, menurut para ahli Astronomi Matahari lahir 4,6 miliar tahun lalu, atwh skitar 10miliar thun stlah BIGbang.
Dan diperkirakan umur Matahari skitar 5miliar th lagi.
Masa hidup matahari:

1. Disalahsatu lengan spiral Bima Sakti skelompok awan mulai mengkerut karena diakibtkan gelombang kejut dr ldakan bintang masif disekitarnya.

2. Dipusat awan yg berkontraminasi tsb. Materi yg berotasi menjadi semakin mampat, panas, dan terang, menjadi cikal bakal bintang atwg protostar.

3. Materi yg terkondensasi mengakibatkan peningkatan tempeqatur yg luar biasa dan memicu terjadinya reaksi nuklir di intinya dan menjadi sebuah bintang. Debu dsekitarna membentuk Protoplanet

4. Unsur2 yg lebih ringan tersapu dan membentuk planet2 gas raksasa. Unsur yg lbih beran mmbentuk planet dalam seperti Bumi.

5. Sejak saat itu Matahari memasuki masa stabil.dan ini memungkinkan khdupan bumi muncul. Para ilmuan memperkirakan 500tj thn lgi Matahari akan lbh trang dan besar.

7. Ketika kndungan hidrogenya hbis, Matahari akan berubah menjdi raksasa merah yg 100x lbh besar dan terang, dan akan menelan Bumi kita pada akhirnya.

8. Tiba2 reaksi nuklir di inti Matahari akan trhenti, kemudian melontarkan selubung gas disekitarnya dan akan membentuk planetari nebula.

9. Matahari kemudian menjadi bintang katai putih, lbih kcil dari Bumi. Namun memiliki kerapatan yg sangat tinggi, 1cm kubik seberat 1ton.

10. Setelah miliaran tahun, matahari akan kehabisan bahan bakar, dan menjadi bintang katai gelap.

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