The distance to the Crab Nebula is two kiloparsecs (R ≈ 2 kpc). In the Crab Nebula, a supernova exploded in 1054.

The distance to the Crab Nebula is two kiloparsecs (R ≈ 2 kpc). In the Crab Nebula, a supernova exploded in 1054. How many years ago did the Supernova of 1054 explode?

The distance to the Crab Nebula is R ≈ 2 kpc ≈ 6520 sv. years old. 950 years have passed since 1054. 6520 + 950 = 7470 years, so more than 7 thousand years have passed since the star exploded, shedding its shell. It makes no sense to talk about greater accuracy.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.