EASY

Earn 100

Geocentric model was proposed by __________.

50% studentsanswered this correctly

Important Questions on Gravitation

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

The velocity of a planet is constant throughout its elliptical trajectory in an orbit.

MEDIUM

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Why is there no lunar eclipse and solar eclipse every month?

HARD

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

What are main elements of geocentric theory?

MEDIUM

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Explain in detail the Eratosthenes method of finding the radius of Earth.

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

The following photographs are taken from the recent lunar eclipse which occurred on January

31, 2018

. Is it possible to prove that Earth is a sphere from these photographs?
Question Image

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Define heliocentric theory of solar system.

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

What is the average radius of earth?

MEDIUM

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Explain how geocentric theory is replaced by heliocentric theory using the idea of retrograde motion of planets.

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

How will you prove that Earth itself is spinning?

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

The star-like objects at the edge of the universe are:

HARD

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Describe the measurement of Earth’s shadow (umbra) radius during total lunar eclipse

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

A student was asked the question ‘why are there summer and winter for us? He replied as ‘since Earth is orbiting very far away from the Sun(aphelion) there will be winter, when the Earth is nearer to the Sun(perihelion) there will be winter’. Is this answer correct? If not, what is the correct explanation for the occurrence of summer and winter?

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

The planet farthest from the sun is

EASY

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Who was the first to measure the earth's radius-

MEDIUM

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

Give your arguments in support of the heliocentric theory.

HARD

Physics>Mechanics>Gravitation>Elementary Ideas of Astronomy

The Moon Io orbits Jupiter once in