Which Astronomer used his eyes to observe movements in the sky

Which Astronomer created geometric models to show his belief that the solar system was geocentric

Which astronomer was one of the first to believe the solar system was heliocentric and believed the Earth rotated on its axis

Which astronomer proved the solar system was heliocentric, perfected the telescope, and discovered some of Jupiter's moons?

The term for sun-centered

The term for Earth-centered

The smallest planet is

The planet that comes after earth is

Which of these is not a terrestrial planet?

Which of these is not a Gas Giant?

The largest TERRESTRIAL planet is

The smallest GAS GIANT is

The second planet from the sun is

The planet between Saturn and Neptune is

Earth's Twin is

The "red planet" is

The second smallest planet is

The second largest planet is

The planet we live on is

The planet that comes between Mars and Saturn is