The Sun is part of the top 10% of stars in the solar system since most stars in the solar system are less massive. It is a medium-sized yellow dwarf and was formed 4.6 billion years ago when gas clumped together. A protostar was formed, and when the pressure inside of it was high enough due to gravity, the Sun was formed. The remaining matter around the Sun became planets, comets and asteroids.
 |
| Main sequence stars form the largest band here. By Richard Powell - The Hertzsprung Russell Diagram, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1736396 |
The Sun is a main-sequence star. It is part of a group of stars that form a distinctive band when plotted on a graph of stellar colour versus brightness. 90% of stars are main-sequence. It ranges from 10% of the Sun's mass to 200 times its mass. They fuse hydrogen into helium in their cores. The fusion prevents the star from collapsing onto itself by providing an outward pressure.
Protostars with less than 8% of the Sun's mass would end up becoming a brown dwarf, an object between stars and planets.
The Sun is made up of 75% hydrogen and 25% helium. Metals make up less than 0.1% of its mass. The Sun's surface is about 5700°C.
The Sun has 6 layers - the core, the radiative zone and the convective zone, which cannot be seen, and the photosphere, chromosphere and corona, which can be seen.
The core is made up of 91% hydrogen. The energy moves out through different layers and is eventually released into the solar system as heat and light. Its temperature is 15 million °C.
Nuclear fusion occurs in the core. Hydrogen gases are compressed and fused together, creating helium. Atoms break apart into charged particles, turning into plasma, at these extreme temperatures. The energy, mostly in the form of gamma rays and neutrinos, is carried into the radiative zone. photons can bounce around here at random, taking them between a few thousand and a million years before travelling to the surface.
The radiative zone is between the core and convective zone. It allows energy from the core to move outwards as electromagnetic radiation, conveyed by photons. It has a temperature of 2 million °C.
The convective zone is 200,000 km thick and is where light is created. Hot plasma rises and cools off near the surface, and sinks down to be heated again. It generally becomes hotter and less dense as you move outward. Energy is transported by convection.
The Sun's atmosphere is composed of the photosphere, chromosphere and corona.
The photosphere is the first visible part of the Sun, and it's the so-called "surface". It is 500 km thick and energy is released as light here. Sunspots are here. They are relatively cooler parts of the photosphere.
The chromosphere is 2000 km thick and its red glow can only be seen during a total solar eclipse because the photosphere outshines it. It can conduct the sun's hear through the different layers.
The corona is the top layer of the Sun. It is 300 times hotter than the photosphere, at 1-2 million °C. It has a low density and can only be seen during a solar eclipse as the photosphere outshines it.
The Sun takes 250 million years to orbit around the galactic centre and its average velocity is 828,000 km/h. It is located 28000 light-years from the galaxy's centre.
I learnt about the Sun and what makes it up. I learnt that I should be more accurate in typing so as to not waste time correcting the typos. The Kahoot game was slightly interesting, but I was affected by the slow wifi, pulling down my ran. The slides were boring but informative as they were filled with text.
The Sun has 6 layers - the core, the radiative zone and the convective zone, which cannot be seen, and the photosphere, chromosphere and corona, which can be seen.
The core is made up of 91% hydrogen. The energy moves out through different layers and is eventually released into the solar system as heat and light. Its temperature is 15 million °C.
Nuclear fusion occurs in the core. Hydrogen gases are compressed and fused together, creating helium. Atoms break apart into charged particles, turning into plasma, at these extreme temperatures. The energy, mostly in the form of gamma rays and neutrinos, is carried into the radiative zone. photons can bounce around here at random, taking them between a few thousand and a million years before travelling to the surface.
The radiative zone is between the core and convective zone. It allows energy from the core to move outwards as electromagnetic radiation, conveyed by photons. It has a temperature of 2 million °C.
The convective zone is 200,000 km thick and is where light is created. Hot plasma rises and cools off near the surface, and sinks down to be heated again. It generally becomes hotter and less dense as you move outward. Energy is transported by convection.
The Sun's atmosphere is composed of the photosphere, chromosphere and corona.
The photosphere is the first visible part of the Sun, and it's the so-called "surface". It is 500 km thick and energy is released as light here. Sunspots are here. They are relatively cooler parts of the photosphere.
The chromosphere is 2000 km thick and its red glow can only be seen during a total solar eclipse because the photosphere outshines it. It can conduct the sun's hear through the different layers.
The corona is the top layer of the Sun. It is 300 times hotter than the photosphere, at 1-2 million °C. It has a low density and can only be seen during a solar eclipse as the photosphere outshines it.
The Sun takes 250 million years to orbit around the galactic centre and its average velocity is 828,000 km/h. It is located 28000 light-years from the galaxy's centre.
I learnt about the Sun and what makes it up. I learnt that I should be more accurate in typing so as to not waste time correcting the typos. The Kahoot game was slightly interesting, but I was affected by the slow wifi, pulling down my ran. The slides were boring but informative as they were filled with text.
Comments
Post a Comment