Solar eclipse occurs when the Moon is in between the Sun and the Earth, and the Moon partially or completely blocks out the sun.

• TRUE

• FALSE

Mercury, Venus, Earth, Mars, Jupiter, and Saturn were the first planets to be seen by Greek astronomers in the sky before the advent of telescopes.

• TRUE

• FALSE

Ancient people have observed that the moon changes its path and its appearance within 29 days.

• TRUE

• FALSE

Using gnomon or sundial, ancient Greeks recorded the points where the sun rises and sets on the horizon and used it as the determiner of time of the day.

• TRUE

• FALSE

Socrates and Plato taught their students that the world was round but they had no justification or proof.

• TRUE

• FALSE

All planets revolve around the sun in an elliptical orbit.

• A. Law of Ellipse

• B. Law of Harmony

• C. Law of Equal Areas

Planets move fastest in the elliptical orbit when nearest to the sun.

• A. Law of Ellipse

• B. Law of Harmony

• C. Law of Equal Areas

The farther the planet is from the sun, the longer its revolutionary days.

• A. Law of Ellipse

• B. Law of Harmony

• C. Law of Equal Areas

The length of a planet’s revolution in the Sun is proportional to its orbit’s size.

• A. Law of Ellipse

• B. Law of Harmony

• C. Law of Equal Areas

He made three observations that prove that the Earth is spherical.