Pregunta
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When a Red Super Giant star reaches the end of its life, it explodes. What is this very large explosion
called? What are the two possible outcomes of that explosion?
When is a star a Main Sequence Star?
What happens to the largest of all stars at the end of their life?
How does the Sun compare to Very Massive Stars in temperature, brightness, and lifespan?
BLACK HOLES
Where can we expect to find Super Massive Black Holes?
How many Solar Masses is the approximate minimum for a black hole to form from?
Approximately how many solar masses is a Super Massive Black Hole?
Why are black holes black? (why can’t we see anything inside the black hole)
What created the first gravitational waves humans ever detected?
If black holes are “invisible”, how can we find them?

Ask by Hanson Norris. in the United States
Mar 11,2025

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Respuesta verificada por el tutor

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1. Explosion of a Red Super Giant Star:
When a Red Super Giant star ends its life, it undergoes a supernova, a very large explosion.
2. Outcomes of the Explosion:
After a supernova, the star’s core can become either a neutron star or a black hole, depending on its mass.
3. Main Sequence Star:
A star is a Main Sequence Star when it fuses hydrogen into helium in its core, maintaining a stable balance between gravity and thermal pressure.
4. End of Largest Stars’ Lives:
The largest stars end their lives by collapsing into a black hole after a supernova explosion.
5. Comparison with the Sun:
  • Temperature and Brightness: Very massive stars are hotter and much brighter than the Sun.
  • Lifespan: Very massive stars have shorter lifespans compared to the Sun.

BLACK HOLES
6. Location of Super Massive Black Holes:
Super Massive Black Holes are found at the centers of galaxies.
7. Minimum Mass for Black Hole Formation:
A black hole forms when a star’s mass exceeds about 3 Solar Masses.
8. Mass of Super Massive Black Holes:
They range from a few million to several billion Solar Masses.
9. Why Black Holes Are Black:
Black holes are black because their gravity is so strong that nothing, including light, can escape from within the event horizon, making them invisible.
10. First Detected Gravitational Waves:
The first gravitational waves detected were produced by the merger of two black holes.
11. Detecting Black Holes:
Even though black holes are invisible, they can be detected by observing their gravitational effects on nearby stars and gas, the radiation from accretion disks, and gravitational waves produced by their mergers.

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The Deep Dive

When a Red Super Giant reaches the end of its life, it undergoes a spectacular explosion known as a supernova. Following this explosive event, two main outcomes can occur: the core may collapse into a neutron star, or if the mass is sufficient, it might further collapse into a black hole, creating one of the most enigmatic objects in the universe.
A main sequence star, such as our Sun, spends the majority of its life fusing hydrogen into helium in its core, which occurs during a stable period. The Sun, like many other stars, will enjoy this phase for around 10 billion years before it expands into a red giant, showcasing the incredible life cycle stars go through as they age.

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