He has a selfish personality that imposes his own opinions.

In this story, all of Tan's actions are absurd and incomprehensible.

My car needs regular maintenance.

The agenda of the Security Council is an important issue related to national security and defense.

A white dwarf is a celestial body that a giant star becomes at the end of its life.

A brown dwarf is a celestial body that has a size between a star and a planet.

Red dwarfs are the most common type of star in the universe.

I was able to find the Big Dipper.

It is believed that black dwarfs are formed by the cooling of white dwarfs.

Please imagine the day when aliens come to Earth.