Its age, its lifespan … Here is the Sun’s identity card!
Nature : star
Age : 4.6 billion years
Estimated life : 5 billion years
Ray : 700,000 kilometers
Diameter : 1.4 million km, 109 times that of Earth
Perimeter : 4.4 million km
Description of the Sun
1. Solar crown. The solar corona stretches over millions of km. Degrees: 1 to 2 million ° C
2. Chromosphere. Degrees: 10,000 ° C to 4,200 ° C. Thickness: 10,000 km
3. Convection zone. Degrees: 500,000 ° C to 6,400 ° C. Thickness: 199,752 km
4. Core. The nucleus produces energy from the sun. It turns on itself in 7 days. Degrees: 15 million ° C. Thickness: 250,000 km
5. Radiation area. The radiation zone is a layer of gas so dense that it takes millions of years for the energy of the nucleus to pass through! Degrees: 10 million at 500,000 ° C. Radius: 244,160 km
6. Photosphere. It’s the visible surface of the sun. Its name means “sphere of light”. Degrees: 6,500 ° C to 4,500 ° C. Thickness: 500 km
7. Protuberance. It’s a burst of energy that lasts a few minutes to a few hours.
Temperature and composition
Composition : gas ball including:
• Hydrogen: 73.46%
• Helium: 24.85%
• Oxygen: 0.77%
• Carbon: 0.29%
• Iron: 0.16%
• Neon: 0.12%
• Traces of silicon, magnesium and sulfur.
Center temperature : 15.5 million degrees Celsius
Surface temperature : 6000 ° C
Atmosphere temperature : over a million degrees Celsius
Average distance from Earth : between 147 and 152 million km.
Situation of the Sun : on Orion’s arm of the Milky Way galaxy (name of the galaxy in which the Sun and the solar system are located).
Unravel the true from the false!
To measure distances in space, astrophysicists count in “dust years”. True or false ?
It’s wrong. Astrophysicists count in “light years”. A light year is the distance that the light of a star travels in a year. However, light travels 300,000 km per second. In one year, it therefore covers the incredible distance of around 9,470 billion km.
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