What is a supernova?

Supernovae are exploding stars. During explosions, huge energy is released, matter can be ejected at a colossal speed of the order of thousands of kilometers per second. The remnants of shells ejected by supernovae look like expanding nebulae.

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.