Months ago....
In the still of the night...Karim with Mama at the 'perkhemahan SRIAAG'.
Mama : Those stars, they are so beautiful.
Karim : Ye Ma, of course. Ha, Did mama know, why do those stars blink?
Mama : No, but, I guess it is because of the refraction of light. Isn't it?
Karim : Emmm, I think I have a more convincing answer. I've asked teacher Azizan about this, and she said, the stars were blinking because of the random movement of air particles.
Mama : Tarak faham, You mean the light is blocked? By the air particles? Sporadically?
Karim : Yup! And one more thing. Have mama ever imagine? About the stars. Their numbers. Recent calculations showed that the approximate numbers of stars are very-very unimaginable. Let say, Mama count all of the 'pasir' in the whole world, including 'tepi pantai', at the construction sites, at 'bukit-bukau', all over the world lah. Then mama times the amount of those 'pasir' by five. All of the 'pasir' X 5 = amount of stars in the universe instantly. Masya Allah. (Let us praise the GOD)
Mama : Masya Allah...guess this is enough to take you to your God. Be a good son eh?
Karim : Insya Allah,..
------------------------------------------------------------------------------------
Salam...kepada semua pembaca. Kali ini, episod ini lebih kepada Bumi Kita. Earth Hour, time kat Kelantan terang benderang, tapi kat rumah gelap sangat, cuma ada hamba-hamba Allah yang tangannya bercahaya. Allahu Akbar. HP rupanya..haha.
Dalam sistem suria ini, terlalu banyak perkara yang kita tak sedar, tentang kehebatan kita. Cuba tengok tangan kita, there's a complex mechanism yang kawal mitosis kita. Kulit bertambah SETIAP HARI. Amat-amat jarang sistem kawalan ini rosak, unless ada anasir luar seperti radiasi atau toksik. Kita lihat pula dalam DNA, perpustakaan terhebat di dunia. Human Genome Project-bertahun-tahun dengan pakar-pakar genetik dari seluruh dunia untuk siapkannya. Namun, Allah tiada masalah untuk menghasilkannya dalam setiap sel di dalam setiap manusia. Tahukah anda? Maklumat dalam DNA kita menyamai dengan 900 muka surat ensiklopedia yang mempunyai 500 jilid. Masya Allah, banyak bangat tu. Still, masih ada yang menganggap perkara ini terjadi secara 'coincidence'. Still, masih ada yang berbuat dosa. Still, masih ada yang menyombong diri.
Jarak BUMI dari Matahari
Kalau ikut approximation, relatively jaraknya 149 juta. Which takes light from the sun that moves around 300,000 km per second to reach the Earth in, maybe 8.27 minutes. 149 million/ 300,000=496.667 seconds - 496.667/60=8.27 min. But, that's not the case. Apa yang Karim nak bincang di sini, ialah jarak Bumi dengan Matahari, adalah amat-amat TEPAT untuk suhu yang membenarkan kehidupan di bumi. Apa yang Karim maksudkan?
Begini, kita, hidupan, semua hidupan yang hidup terdiri daripada carbon-based molecule. Carbon adalah penentu kehidupan, bukan penentu secara qat'ie, tapi lebih kepada hukum biologi. Masya Allah, jarak Bumi dengan Matahari, khas dicipta Allah untuk membenarkan suhu yang amat sesuai untuk membenarkan kewujudan carbon-based molecule. Carbon-based molecule hanya boleh wujud dalam purata suhu 120C hingga -20C, dan hanya Bumi satu-satunya planet yang jatuh purata suhu dalam range tersebut. Masya Allah. Alam ini direka khas untuk manusia, God really mean something when He said human is the khalifah in the Earth. Masya Allah. Itu sudah cukup? Takkan tak ad planet lain? Mari lihat.
Pluto - cantik, biru. Karim suka biru. Sejuk. Suhu -238C. Atmosfera, dekat dengan Matahari dalam keadaan bergas, macam Bumi, tapi kebanyakan masa atmosferanya adalah Ais!!!
Neptune - Sejuk jugak. Suhu -218C. Atmosfera beracun, methane and hydrogen, helium. Ha, lagi satu, angin di sana bertiup selaju 2000 km sejam!
Uranus - Sejuk jugak. Ais dan batu di permukaan. -214C. Atmosfera pun beracun.
Saturn - Kedua terbesar, ada cincin cantik keliling dia. Lagi satu, suhu macam biasa -178C, dan dia boleh terapung atas air. Pelik tapi benar. Density less than water.
Jupiter - Paling besar, bergas. Dia sebagai pelindung bumi. Sebab saiz dia yang memang besar, kebanyakan bendasing di angkasa terhempas di Jupiter. Saintis mengatakan kalau Jupiter tak wujud, Bumi akan jadi berkawah seperti Bulan! Masya Allah, setiap ciptaan ada tujuan. Lagi satu, sejak 300 tahun dahulu, manusia mula sedar ada taufan di Jupiter, sampai sekarang masih bertiup, saiz taufan cukup untuk telan Bumi dan beberapa planet yang sesaiz dengannya.
Mars - Ada hidupan? No, Carbin dioxide banyak, panas. Julat suhu besar antara malam dan siang. Air? Tak tahu.
Planet lepas bumi? Tak perlu kot, dah tahu panas sampai batu pun lebur.
Bumbung Bumi
Van Allen Belt.
Apa itu? Untuk pengetahuan semua pembaca, kita punya Bumi, Allah punya sebenarnya, ada enjin. Enjin yang cukup-cukup sesuai untuk hidupan. Kalau enjin haba yang fueled by radioactivity ini sedikit slow, aktiviti geologi akan lambat, besi takkan sempat cair dan tenggelam untuk jadi teras dan medan magnetik takkan terbentuk. Kalau laju SIKITTT, gempa bumi akan berlaku sana sini, debu volkano akan penuh, mendung jadi. Namun, Allah telah gerakkan enjin ini pada kelajuan yang amat-amat tepat.
Medan Magnetik yang dimaksudkan apabila nikel dan besi yang bertindak as teras luar dan dalam yang berinteraksi antara satu sama lain menghasilkan satu medan magnetik yang amat penting dalam perlindungan bumi, yang extend jauh luar bumi.
Medan yang dinamakan Van Allen Belt ini berfungsi melindungi bumi dari radiasi dari angkasa lepas termasuk dari bintang-bintang kecuali matahari. Medan yang extend 10 ribu batu dari bumi inilah yang melindungi bumi dari tenaga yang amat merbahaya ini. Kiraan membuktikan bahawa plasma clouds yang terperangkap dalam medan ini berkuasa bersamaan dengan 100 Billion kali ganda lagi berkuasa daripada bom yang dijatuhkan di Hiroshima. Masya Allah, tak sedar pun. Kita rehat dalam rumah, tak rasa apa-apa. One more thing, tenaga elektrik yang perlu untuk hasilkan medan itu bersamaan dengan semua tenaga elektrik yang pernah dihasilkan dari dulu hingga sekarang!! Masya Allah. Hebat ciptaan Allah, khas untuk khalifah di muka bumi.
We made the sky a persevered and protected roof yet still they turn away from Our Signs.<
(Surat al-Anbiya: 32)
Itu saja untuk edisi kali ini. Salam. Moga menambah Iman di dada, dan dizahirkan dengan amal, didasarkan dengan ikhlas. INSYA ALLAH.
23 comments:
Since you ask me about those twinkling star, I've been doing some research and here is the result. Read through and hope you'll gain something from it.
=)
"Karim : Ye Ma, of course. Ha, Did mama know, why do those stars blink?"
In the professional world of astronomer, these blinking or twinkling of the star is actually called scintillation.
As it turns out, the stars don’t really twinkle. Rather, this is an effect of our atmosphere. In space, the stars would appear as steady pinpoints. Turbulence in the atmosphere is largely responsible for the twinkling effect, so the steadier the atmosphere, the less the stars seem to twinkle and sparkle, and the more unsteady the atmosphere, the more the stars seem to twinkle and sparkle.
But, how does atmospheric turbulence make the stars twinkle (or scintillate)?
The light appears to come from a single point in the sky.As this light passes through Earth’s atmosphere, it is bent a bit whenever it passes through a region of slightly denser air. Different colors of light, in principle, take slightly different paths, since the degree of refraction (bending) that light undergoes is frequency dependent.
Now, if this were all that was going on, then the star would simply appear slightly out of position in the sky rather than twinkling. If the different colors were bent far enough apart, then the star might appear as a tiny little splotch of colors (like a tiny rainbow) rather than a pinpoint. That would be if the air were completely unmoving. But, that isn’t what happens. The air moves around. Solar heating causes convection. Winds blow. Different parts of the air are compressed and rarefied as the air moves. These different regions refract light differently.
As the path of light moves around, the apparent position of the star changes slightly. This is part of the twinkling.
The paths do not all take the exact same length of time for light to traverse. So, as the paths shift from one to another sometimes the shift takes less time than the difference in time that the light takes to travel the different paths. When that happens, the star can sometimes appear to wink in and out very quickly. This tiny flicker is what most of what you perceive as twinkling.
So, that is part of the reason that stars twinkle. It is all atmospheric.
SoIT IS LIKE, for example, let say, X is a ray of light.
For t1, X travels thru atmosphere, and it travels into our eyes by the refraction angle of Y1.
Then t2, X travels and do not travel ito our eyes owing to the moving air, changing the densities thus swaying the ray.
Then t3, X travels and it travels into our eyes, again by Y1 or other angle that causes the ray to enter our eyes. Air moves again.
Gitu? Ada betul? Kalau boleh explain lg, detail. Ana nk tahu n blaja. Btw, thanks.
t=second.
y=angle
Let's just say that every stars emits various color of light rays. There might be red, blue or yellow. And every colour have its own frequency.
For every different frequency, there will be different refraction angle as it passes different densities and temperature of the air. And of course not to leave the turbulence of the air.
Hence, not every light rays will be in contact with our eyes. If it did contact, we'll see it,if it didn't, we'll not see it. That is what causing the blinking or scintillation to occur.
So, the manipulated one is the turbulence of air? IN case we only focused on A star....
the manipulated one is not only the turbulence of air. it also includes the temperature and the density of the atmosphere. All these three variables causes the light rays to be refracted. If all three are involve, then the scintillation will occur more.
But if only one of the variables is present, the star will seem to scintillate, but just a little one.
faham.thnx
pbualan budak2 intellect...xphm
welcome2..=)
I just write what I know...
Kalau nak tau lagi, bolehla google dalam internet...banyak ilmu boleh dapat...
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