The force of gravity is____  force that is ______  proportional to the ______  of the distance between the two given masses.
The information in which alternative completes the given statement?

The gravitational force between two masses m₁ and m₂, separated by a distance r, is F. The mass m₁ is then reduced to three-fourth of its initial value.

To keep the gravitational force constant without changing m₂, the separation r should be

The information in which alternative represents the values of a and b?

Proxima Centauri is at  a distance of.......light years from the earth.

Which force is responsible for keeping the planets and the satellites moving in their respective orbits?

According to Big Bang theory, all the celestial objects existed at a certain point which is

A njattuvela is approximately ......days.

The star nearest to the Earth after the Sun is

The small celestial objects, known as meteors, burn out as they enter the Earth’s atmosphere.The meteors heat up on entering the earth’s atmosphere because of

The central part at which numerous stars are concentrated is called