Universe - Study Mode

[#86] Foucault experiment is proof of which one of the following?
Correct Answer

(B) Rotation of Earth

Explanation

Solution: The Foucault pendulum is a simple device named after French physicist Léon Foucault and conceived as an experiment to demonstrate the Earth's rotation.

[#87] The distance between the Earth and the Sun (in million kms) is ________
Correct Answer

(B) 149

Explanation

Solution: Our solar system is so big it is almost impossible to imagine its size if you use ordinary units like feet or miles. The distance from Earth to the Sun is 93 million miles (149 million kilometers), but the distance to the farthest planet Neptune is nearly 3 billion miles (4.5 billion kilometers).

[#88] Which of the following is called Red Planet?
Correct Answer

(C) Mars

Explanation

Solution: Mars is often called the 'Red Planet' because it appears in the sky as an orange-red star. The colour caused the ancient Greeks and Romans to name it after their god of war. Today, thanks to visiting spacecraft, we know that the planet's appearance is due to rust in the Martian rocks.

[#89] Which of the following statements is/are correct with regard to Milky Way? 1. It is a spiral galaxy. 2. The solar system resides in one of its spiral arms. Select the correct answer using the codes given below
Correct Answer

(C) Both 1 and 2

Explanation

Solution: The statements that are correct with regard to Milky Way are - it is a spiral galaxy and the solar system resides in one of its spiral arms.

[#90] The planet having fourteen moons is ________
Correct Answer

(D) Neptune

Explanation

Solution: Neptune has 14 moons, all named after various sea gods and nymphs in Greek mythology. Almost half of Neptune's moon discoveries occurred decades after NASA's Voyager 2 spacecraft swung past the planet and its system, demonstrating how far telescope technology has progressed. All of Neptune's moons derive their respective names from Greek mythology. They are: Naiad, Thalassa, Despina, Galatea, Larissa, Hippocamp, Proteus, Triton, Nereid, Halimede, Sao, Laomedeia, Psamathe and Neso. This arrangement has been done keeping in mind their closeness to their planet.