Nightfall is a novel that tells a story about a made-up planet called Kalgash. On this planet, there are six suns that shine in the sky all the time, and people have never experienced darkness. But, once every 2,049 years, all six suns align and disappear from the sky, causing total darkness.
Now, imagine you're in a big room with lots of lights on. You can clearly see everything around you. But suddenly, someone turns off all the lights, and it becomes very dark. Nightfall is like that on the planet Kalgash.
The people who live on Kalgash have never experienced darkness before. They have only known light their whole lives. So, when nightfall comes, they become very scared and don't know what to do. They can't see anything because there is no light, and it makes them feel lost and confused.
In the novel, there are a group of scientists who study the stars and the effects of nightfall. They try to warn the people that nightfall is coming. But most people don't believe them or don't understand the danger.
The scientists are worried because they think that when nightfall comes, people will panic and become violent. They are also curious to know what causes nightfall and why it happens every 2,049 years.
Eventually, when nightfall finally arrives, chaos breaks out among the people. They start destroying things and hurting each other because they are so scared and confused in the darkness. It's like when you can't find your favorite toy and you get upset and knock down things in your room.
The scientists, who were prepared, have a plan to survive the nightfall. They have built a special underground place with artificial light, where they can hide until the suns come back. It's like building a fort in your room, where you have a flashlight and some toys to keep you safe and entertained until your parents turn on the lights again.
As the story goes on, the scientists discover that nightfall happens because there is another planet in the universe that comes close to Kalgash every 2,049 years. This planet blocks all the light from the suns and causes total darkness on Kalgash. It's like when someone stands in front of a lamp and casts a shadow, making everything around it dark.
The scientists also find out that every time nightfall happens, the people on Kalgash destroy everything and start over again after the suns return. It's like when you clean up your room and put everything back in its place after making a mess.
Overall, Nightfall is a story about the fear of the unknown and how people react when something completely different happens to them. It shows that we can be scared of things we have never experienced before and that sometimes, we need the help of scientists and experts to understand and survive these situations.