The Sun
The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convectivemotion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometers (864,000 miles), or 109 times that of Earth, and its mass is about 330,000 times that of Earth. It accounts for about 99.86% of the total mass of the Solar System. Roughly three quarters of the Sun's mass consists of hydrogen (~73%); the rest is mostly helium (~25%), with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron.
Some elements present in sun
Will the sun shine for ever?
The sun is a star- a vast sphere of luminious gas. it's light is a by-product of gas-fuelled nuclear reactions in its core. It shines steadily now, but in about five billion years it will swell up before dying as a cold, dark cinder in space.
Hot, Hot, Hot
How hot is the sun?
It depends where you put your thermometer...
Corona: 2 million C (3.6 million F)
Transition region (between chromosphere and corona):20,000 C (36,000 F) to 1 million C (1.8 million F)
Chromosphere: from bottom to top 4,500 C (8,100 F) to 20,000 C (36,000 F)
Photosphere: 5,500 C (9,900 F )
Core: 15 million C (27 million F)
Will the sun shine for ever?
The sun is a star- a vast sphere of luminious gas. it's light is a by-product of gas-fuelled nuclear reactions in its core. It shines steadily now, but in about five billion years it will swell up before dying as a cold, dark cinder in space.
Hot, Hot, Hot
How hot is the sun?
It depends where you put your thermometer...
Corona: 2 million C (3.6 million F)
Transition region (between chromosphere and corona):20,000 C (36,000 F) to 1 million C (1.8 million F)
Chromosphere: from bottom to top 4,500 C (8,100 F) to 20,000 C (36,000 F)
Photosphere: 5,500 C (9,900 F )
Core: 15 million C (27 million F)
Tell me more:The sun
- About 75% of the sun is hydrogen, most of the rest is helium.
- the sun is about 4.28 light years from its nearest starry neighbour, proxima centauri.
- The sun is about 5 billion years old.That's a lot of candles!
- It is about 1.4 million km (870,000 Miles) across.
- Eight planets orbit around the Sun-only about 4 percent of the stars in the sky have planets.
WEIRD OR WHAT?
The sun's gravity pulls gas inwards, but the pressure of the gas at the centre pushes outwards. The two forces balance to give the sun its ball shape.
Tell me more:the sun's surface
The layers of the sun
- Corona: The outer atmosphere,seen during an eclipse.
- Chromosphere: The inner atmosphere.
- Photosphere: The visible surface of the sun from which energy released in a blaze of light.
- Convective zone: The layer through which the sun's energy travels outwards through the sun by "convection"
- Radiative Zone: The layer through which energy travels outwards from the core as radiation.
- Core: The centre of the Sun where nuclear reactions convert hydrogen to helium, producing energy.
- Flares: These are massive bursts of energy that explode in the sun's lower atmosphere.
- Spicules: Short-lived jets of gas shoot out from the surface.
- Prominences: Sometimes gaint clouds of gas loop out hundreds of thousands kilometres.
- Faculae: The hottest areas, called faculae, look almost white and are highly active regions created by the Sun's magnetic field.
01.Using a eclipse viewer, observe the moon passing directly in front of the sun- a rare occurance not be missed!
02.Observe the moon looking dark disc, covering more and more of the sun's face slowly day seems to turn to night.
03."Totality" occurs when the moon covers the sun's face completly, reavealing its corona, and lasts 3-4 minutes.
04.As the moon continues on its path, watch the sun come back into view.The sky brightens and distant stars become invisble again.
05.The eclipse is almost over; only a fraction of the sun remains covered, and the shadow cast on Earth by the moon has all but gone.
What about me?
You should never, ever, look directly at the sun. It emits dangerous radiation that can damage cells at the back of your eyes and cause blindness.
Studying the sun
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Have a nice day.
You should never, ever, look directly at the sun. It emits dangerous radiation that can damage cells at the back of your eyes and cause blindness.
Studying the sun
- Watching From Space
- ... and underground
Thankyou Guyzzz how'z our Blog.Tell us in a comment and if you have any question related to our blog so ask me guyzz and subscribe our blog for more info.
Have a nice day.
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