Respuesta :
The average star cycle: nebula, protostar, main sequence, red giant, white dwarf. The massive star cycle: nebula, protostar, main sequence, super red giant, supernova, black hole, neutron star.
The star cycle is the sequence of changes that a star undergoes throughout its existence.
The evolutive stages of an average star are
- Nebula: Stars are born from the nebula that is the dust and gas particles condensation due to gravity effect in the interstellar clouds
- Protostar: It is a more advanced level of condensation.
- Main sequence. Equilibrium between gravity and nuclear fusion helps the star keep stable as long as the fuel lasts. The two main types are
• Orange dwarf: between the red dwarf and the yellow dwarf
• Yellow dwarf: Like the sun
- Subgiant: occurs when orange and yellow dwarfs finish their main sequence and start to run out of fuel, expanding.
- Red giant. After the subgiant stage, the star enters a giant phase. The star can reach a size of up to 100 times its current size.
- White dwarf. When average-sized stars run out of fuel, the red giant begins to disintegrate, losing its outer layers and exposing its core, which will become a white dwarf.
The evolutive stages of a giant star are
- Nebula
- Protostar
- Main sequence. There are two main types
• Yellow supergiant. Extremely short phase. Almost no stars are known to be in this stage. The star swells on its way to becoming a red supergiant.
• Red supergiants are the largest stars in volume, but not in mass.
- Supernova. When fuel is over in the red supergiants, the gravitational collapse produces a violent explosion originating the supernova.
- Neutron star. A celestial body that remains as a remnant after the explosion gives rise to a supernova.
You can learn more about the life cycle of stars at
https://brainly.com/question/2437142
https://brainly.com/question/2456141
Answer:
The Stars Unit Review Practice - 2022
Explanation:
1. ) The red shift shows that galaxies are moving away from each other.
2. ) M
3. ) [1] The Sun's temperature is higher than that of a red supergiant - [2] The Sun will outlive a red supergiant
4. ) Knowing the color and brightness of a star
5. ) Asteriod ; Meteor ; Meteorite
6. ) It's boundary
7. ) ( [1] Average Star Cycle : Planetry Nebula, Red Giant, White Dwarf, Nebula, Average Star, Protostar ) - ( [2] Massive Star Cycle : Black Hole, Neutron Star, Super Red Giant, Supernova, Nebula, Massive Star, Protostar )
8. ) Visible light can be seen by the unaided human eye.
9. ) Hydrogen
10. ) The mass of the star
( 100% - Proof In Attached Document )
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