Thursday, March 24, 2016

Star in the night sky

Holla fellas!!
Let’s sing a song!!
Today we sing our childhood song, twinkle-twinkle little star!!

“Twinkle-twinkle little star, how I wonder what you are.
Up above the world so high, like a diamond in the sky.
Twinkle-twinkle little star, how I wonder what you are.”

Do you know, what is the cause of the twinkling of the star? Stars are turbulence in the atmosphere of the earth. The light from the star is refracted in different direction. The star change slightly in brightness and position, hence it called twinkle. This twinkle condition only sees if you are on the earth, doing stargazing. In space, you couldn’t see twinkle star because there isn’t atmosphere or any compound gas in that atmosphere to make the stars’ twinkle.
With unaided eye or naked eye, we easily see the star. The sky has been mapped by our astronomy in the past. If you learn about the patterns of the stars, you will never feel lost or get lost when staring into the vastness of the night sky.
Have you ever watch the meteor shower while stargazing? Yes, I have once! One time at Merbabu Mountain. When I was hiking to the top in early morning before adzan shubuh, I saw the meteor shower!! Not much any in the short time, but that so amazing!! (I’m not sure, about meteor, star or satellite that I saw before hahha). After we watched that, that motivated us go faster to reach the top of the mountain, very soon! You should try this, once a time on your whole life.
And then, have you ever wonder why the stars are changing color to blue-red-blue when they twinkle? It because of scintillation as the light passes through the atmosphere of the Earth. As the air moves in and out, the starlight is refracted in different colors in every direction. It also because of “chromatic aberration”, star can appear to change color. So cool right this phenomena!!
              You can see the star all over the day. But in the afternoon / day, the star light covered by blue light of the sun, so the stars are lose by the sun! And also because of the star cross the horizon in the day. (sorry if i'm wrong)
Ok that’s enough from today, byebye…. See ya soon!

If you interest and looking more about something in space, check out this source:
Earthsky.org
Spaceanswer.com
Skyandtelescope.com
Space.com
Science.nationalgeographic.com
Science.nasa.gov
Curious.astro.cornell.edu

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