Uchū refers to outer space, encompassing everything beyond Earth's atmosphere, including planets, stars, galaxies, and other celestial bodies.
Wakusei (惑星): Wakusei means "planet" and represents celestial bodies that orbit around a star.
Ginga (銀河): Ginga translates to "galaxy" and refers to a massive system of stars, gas, dust, and other celestial objects held together by gravity.
Hoshi (星): Hoshi means "star" and signifies luminous spheres of plasma that emit light and heat.