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Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi

Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi
Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi
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Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi - Kalian tentu sangat sering melihat matahari. Sudah tahukah kalian bahwa matahari adalah pusat tata surya ? Ya. Sebagai pusat tata surya peranan matahari sangat penting bagi keberlangsungan hidup manusia dan planet-planet lain. Sebenarnya apa bagaimana struktur penyusun matahari sehingga matahari bisa menjalankan tugas dan memiliki fungsi yang sangat besar ? Pada kesempatan ini saya akan memberikan Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi.





Matahari Sebagai Pusat Tata Surya


Matahari merupakan salah satu bintang di dalam Galaksi Bima Sakti yang mempunyai fungsi dan peranan paling penting di dalam struktur tata surya. Hal itu disebabkan matahari merupakan bagian dari tata surya yang mempunyai ukuran, massa, volume, temperatur, dan gravitasi yang paling besar, sehingga matahari mempunyai pengaruh yang sangat besar pula terhadap benda-benda angkasa yang beredar mengelilinginya.



Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi
Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi



Matahari mempunyai garis tengah sekitar 1.392.000 km atau sekitar 109 kali garis tengah bumi. Massa atau berat totalnya sekitar 332.000 kali bumi, volumenya diperkirakan 1.300.000 kali bumi dan temperatur di permukaannya sekitar 6.000 derajat C, sedangkan temperatur di pusatnya sekitar 15.000.000 derajat C.


Temperatur matahari yang sangat tinggi menurut Dr. Bethe (1938) disebabkan oleh adanya reaksi inti di dalam tubuh matahari. Ia berpendapat bahwa dalam keadaan panas dan tekanan yang sangat tinggi, atom-atom di dalam tubuh matahari akan kehilangan elektron-elektronnya sehingga menjadi inti atom yang bergerak ke berbagai arah dengan kecepatan yang sangat tinggi dan menimbulkan tumbukan antarinti atom yang menyebabkan penghancuran sebagian massanya (Massa Defect) dan berubah menjadi energi panas dan cahaya yang dipancarkan ke berbagai arah.





Struktur dan Fungsi Matahari



Struktur / bagian dan fungsi matahari



1) Struktur Matahari


Secara garis besar, struktur matahari terdiri atas tiga bagian utama, yaitu sebagai berikut.


a) Atmosfer Matahari


Atmosfer Matahari adalah lapisan paling luar dari matahari yang berbentuk gas, yang terdiri atas dua lapisan yaitu kromosfer dan korona. Kromosfer merupakan lapisan atmosfer Matahari bagian bawah yang terdiri atas gas yang renggang berwarna merah dengan ketebalan sekitar  10.000 km. Lapisan gas ini merupakan lapisan yang paling dinamis karena seringkali muncul tonjolon cahaya berbentuk lidah api yang memancar sampai ketinggian lebih dari 200.000 km yang disebut Prominensa (Protuberans). Korona adalah lapisan atmosfer matahari bagian atas yang terdiri atas gas yang sangat renggang berwarna putih atau kuning kebiruan dan mempunyai ketebalan mencapai ribuan kilometer.


Lapisan atmosfer Matahari yaitu kromosfer dan korona dalam keadaan normal tidak dapat terlihat jelas dari bumi, sebab tingkat terangnya lebih rendah daripada lapisan permukaan Matahari. Atmosfer Matahari (Kromosfer, Korona, dan Prominensa) hanya dapat terlihat jelas apabila bulatan matahari tertutup oleh bulatan bulan ketika terjadi gerhana matahari total atau melalui pengamatan dengan menggunakan alat Koronagraf.


b) Fotosfer Matahari


Fotosfer Matahari adalah lapisan berupa bulatan berwarna perak kekuningan yang terdiri atas gas padat bersuhu tinggi. Pada fotosfer matahari seringkali terlihat adanya bintik atau noda hitam berdiameter sekitar 300.000 km, bahkan ada yang berdiameter lebih besar daripada diameter bumi dengan kedalaman sekitar 800 km yang disebut umbra. Di sekeliling umbra biasanya terdapat lingkaran yang lebih terang disebut penumbra. Noda-noda hitam pada mataharisecara keseluruhan dinamakan Sun spots.


Pergeseran sun spots pada permukaan fotosfer matahari dapatlah dijadikan acuan atau bukti yang kuat tentang gerakan rotasi matahari yang berlangsung sekitar 25,5 hari di bagian ekuator dan sekitar 27 hari di bagian kutub matahari untuk satu kali putaran. Perbedaan waktu rotasi di ekuator dan kutub matahari disebabkan oleh materi dari matahari yang terdiri atas gas yang berbeda tingkat kerenggangannya (densitas).



c) Barisfer atau inti Matahari


Inti Matahari, adalah bagian dari matahari yang letaknya paling dalam, berdiameter sekitar 500.000 km dan temperatur sekitar 15.000.000 derajat C. Pada barisfer berlangsung reaksi inti beranting putar yang menyebabkan terjadinya sintesa hidrogen menjadi helium dengan karbon sebagai katalisatornya.



Pergerakan Matahari



Matahari tidaklah dalam keadaan statis, tetapi selalu bergerak baik secara individu maupun sistem. Adapun gerakan matahari secara garis besar terdiri atas gerak rotasi dan revolusi. Rotasi Matahari, adalah gerakan matahari berputar pada sumbunya yang berlangsung sekitar 25,5 hari di bagian ekuator dan sekitar 27 hari di bagian kutub matahari untuk satu kali putaran. Perbedaan waktu rotasi di ekuator dan kutub matahari disebabkan oleh materi dari  matahari yang terdiri atas gas yang berbeda tingkat kerenggangannya (densitas). Revolusi Matahari, adalah gerakan matahari beserta anggota-anggotanya mengelilingi pusat galaksi Bima Sakti.




3) Peranan Matahari terhadap kehidupan di planet Bumi


Matahari merupakan benda angkasa yang mempunyai cahaya sendiri. Oleh karena itu, matahari mempunyai peranan sangat penting, antara lain sebagai sumber cahaya dan panas bagi planet-planet di sekitarnya termasuk planet bumi, sehingga kehidupan manusia, tumbuhan dan hewan di planet bumi dapat berlangsung. Selain sebagai sumber panas dan cahaya, matahari mempunyai peranan penting lainnya, yaitu sebagai pengatur variasi iklim dan cuaca di muka bumi, sehingga memungkinkan terjadinya variasi kehidupan di muka bumi.






Semoga dengan adanya Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi ini kalian akan semakin paham dan sangat menguasai bagaimana matahari sebagai pusat tata surya, apa saja struktur dan fungsi bagian-bagian dari matahari, dan bagaimana peran matahari terhadap kehidupan di bumi. Terimakasih telah membaca Matahari Sebagai Pusat Tata Surya, Struktur Matahari dan Fungsi, dan Peran Matahari Terhadap Kehidupan di Bumi.
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Dapatkan 3d model untuk keperluan desain hunian kamu...
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