Test Your Knowledge On The Solar System!

Explanation
There is only one star in our solar system, which is the Sun. The Sun is the central and largest celestial body in our solar system, around which all the planets, including Earth, revolve. Therefore, the correct answer is 1.

Explanation
The heliocentric model of the solar system is the current accepted model, which states that the Sun is at the center of the solar system and the planets orbit around it. This model was proposed by Nicolaus Copernicus in the 16th century and has been supported by extensive scientific evidence. It replaced the geocentric model, which believed that the Earth was at the center of the universe. The heliocentric model accurately explains the movements and positions of celestial bodies in our solar system.

Explanation
The correct answer is 365 days because it takes the earth approximately one year to complete one orbit around the sun. This is the basis for our calendar year, which is divided into 365 days.

Explanation
The correct answer is 24 hours. This is because the earth completes one full rotation on its axis in approximately 24 hours, resulting in day and night cycles. This period of time is commonly known as a day.

Explanation
The correct answer is inertia and gravity. Inertia is the tendency of an object to resist changes in its motion, and it keeps the Earth moving in a straight line. Gravity, on the other hand, is the force of attraction between two objects, and it pulls the Earth towards the Sun. These two forces work together to keep the Earth in its orbit around the Sun.

Explanation
The moon takes approximately 1 month to revolve around the earth. This is because the moon orbits the earth in an elliptical path, completing one full revolution in about 27.3 days. This period is known as the lunar month or the synodic month. During this time, the moon goes through its different phases, such as new moon, first quarter, full moon, and last quarter. The moon's revolution around the earth is responsible for the changing appearance of the moon as seen from the earth.

Explanation
A lunar eclipse can only be seen during a full moon phase. This occurs when the Earth is positioned between the Sun and the Moon, causing the Earth's shadow to fall on the Moon, resulting in the eclipse. During a new moon phase, the Moon is positioned between the Earth and the Sun, making it impossible to observe a lunar eclipse. Therefore, the statement that a lunar eclipse can only be seen during a new moon phase is false.

Explanation
The term "waxing" refers to the moon's phase when it appears to be getting brighter each day. This occurs as the illuminated portion of the moon increases in size from a crescent to a full moon. The opposite phase, "waning," refers to the moon appearing to get darker each day. Gravity and inertia are not directly related to the moon's brightness.

Explanation
The statement "Pluto is a planet" is false. In 2006, the International Astronomical Union redefined the definition of a planet, and according to the new definition, Pluto does not meet the criteria to be classified as a planet. It is now categorized as a "dwarf planet" due to its size and its orbit in the Kuiper Belt.