Describe the characteristics of our star, like the structure and surface temperature, to this Extraterrestrial individual, and tell this otherworldly visitor how our star produces energy.

1. An Extraterrestrial visitor lands on Earth and flags you down to ask some questions about our star, the Sun. Describe the characteristics of our star, like the structure and surface temperature, to this Extraterrestrial individual, and tell this otherworldly visitor how our star produces energy.
2. The Extraterrestrial individual, satisfied with your first answer, probes you further. ET then asks you to explain the life cycle of stars like our Sun, i.e, how they are born, age and finally die.
3. ET explains that in ET’s solar system, many of the stars are large and when they die, they cause lots of damage to planets with life. ET asks you if you know why this is this case? Please explain to ET what types of stars have a violent death and what happens during a supernovae.
4. ET shakes its head in understanding and then states that sometimes strange artifacts are left behind after these explosions. He asks if you can explain what might be left behind after a supernovae occurs?
5. Finally, as ET begins to turn towards its spacecraft, ET asks one final question: what is curved spacetime and what are the ramifications of this phenomenon?

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