Answer:
UY scuti,comet,planet Jupiter etc is the biggest celestial bodies in the universe,Jupiter is the biggest planet,Mercury is the smallest planet, Mercury, Dwarf planet etc are the smallest celestial bodies as dwarf planet eg Pluto has smaller area than Russia.The largest celestial bodies are UY scuti,Jupiter,comets asteroids etc are the longest celestial bodies. Interesting facts Billions of years ago a planet called Thiva collide to Earth which forms the satellite moon.