The circumpolar star is always visible in the north.

His long talk is just like 'a hundred days of sermonizing without a fart.'

Alpha Centauri, in the constellation of Centaurus, is the closest star to Earth.

He said, 'A nameless star comes out in the evening,' teaching me that achieving a goal is not easy.

A sub-brown dwarf is a celestial body between a planet and a brown dwarf.

Astrocytes are one of the important support cells in the brain.