Jupiter is the fifth planet and the largest in the Solar System. It is called a 'Gas Giant' because it's atmosphere is mainly hydrogen gas and helium gas. Like the Sun. Jupiter was also a Roman king.
Venus is the second planet in the Solar System. Just slightly samaller than Earth, Venus has an Iron Core, a Mantle made of hot rock, and a surface made of a thin layer of rock. Venus's atmosphere constists mainly of Carbon Dioxide, with clouds of droplets of sulfuric acid. Venus is also the Roman equivalent to Aphrodite the goddess of beauty.
#1: Unlike Jupiter -a Gas Giant-, Venus is a terrestrial planet - it has an iron core-. #2: The surface of Jupiter is mainly swirling gases and liquids. While the surface of Venus is solid. #3: Venus has a longer day (243 Earth days) than Jupiter (9.92496 hours). #4: Venus spins slowly in the opposite direction than most planets do including Jupiter. #5: Venus is 3,760 miles while Jupiter is 43,440.7 miles. #6: Jupiter has 53 confirmed moons - 67 if you count the provisional 14 moons- while Venus has 0 moons.
#1: Both planets were formed when the Solar System first formed about 4.5 billion years ago. #2: Both planets can not sustain life due to the deadly heat, amount of gas, and lack of oxygen. #3: Both planets are located in the Milky Way galaxy in constellation Sagittarius. #4: Both planets were discovered by Galileo Galilei in 1610.