What Happens to Earth if Sun Becomes a Black Hole?

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SUMMARY

If the Sun were to become a black hole, Earth would remain in its current orbital path, as the gravitational pull would not change despite the Sun's transformation. However, if this event occurred instantly, the Sun would extinguish, leading to a freeze on Earth. The Sun, classified as a main sequence G-class star, will not become a black hole but will instead evolve into a Red Dwarf, which will have long-term effects on Earth and the Moon.

PREREQUISITES
  • Understanding of stellar evolution and classifications, specifically G-class stars.
  • Basic knowledge of gravitational physics and orbital mechanics.
  • Familiarity with black hole formation and characteristics.
  • Awareness of the lifecycle of stars and their impact on surrounding celestial bodies.
NEXT STEPS
  • Research the lifecycle of G-class stars and their evolution into Red Dwarfs.
  • Study gravitational effects of black holes on nearby celestial bodies.
  • Explore the physics of orbital mechanics in relation to mass changes in stars.
  • Investigate the implications of stellar extinction on planetary climates.
USEFUL FOR

Astronomy enthusiasts, astrophysicists, and anyone interested in the long-term fate of the solar system and the effects of stellar evolution on planetary bodies.

linnus
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I have no idea where this goes...
But I have a question. Say if the sun was big enough to turn into a black hole, what will happen to the earth? Will it stay in the same orbital path or will it be suck in by the black hole? Thanks
 
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Did this problem with my dad some years ago. If the sun turned into a black hole (assume some magical shriking device or whatever to reduce the sun to a size less than 2km while retaining it's mass)

If it happened instantly the result would be that the sun would go out and we all freeze to death. But it would stay a frozen ball in the same orbit.

The questions happen when you ask, How? Why? Over what length of time? The answers to these questions tell you what happens to other nearby objects. Just for peace of mind, the sun will never become a black hole. As a main sequence G class star in its mass class it will go the Red Dwarf route. Bad for the moon, and then Earth in the long term, but not as spectacular. Sigh. Guess old Sol is just a blue collar worker in the solar world...lol
 

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