What portion of the universe is influenced by gravitational force?
Gravitational force is a form of force of attraction in the Universe. Every particle of matter exerts a gravitational pull on every other particle in the Universe.
Is gravitational force variable?
In 1687, the famous British scientist Isaac Newton proved that bodies having more mass exert greater gravitational pulls and as one moves farther from the centre of a massive body, the effect of such pull decreases. For example, a person standing on the surface of the Moon would weigh less than what weighed on Earth since the gravity on the Moon’s surface is less than that on the Earth’s surface. Also if he goes away from the Earth in a rocket, his weight will go on increasing.
What is the relationship between gravity, mass, weight and density?
Mass is the amount of matter that an object contains. All objects have mass. When gravity acts on a body, the body appears to have weight. As gravity increases, weight of the body also increases but the mass of the body remains unchanged. A stone weighing 1 kg and a pillow weighing 1 kg both have the same mass and therefore the same weight, but the stone has less volume than the pillow, because the material in the stone is more density than the pillow.
What is the galactic plane?
Galactic plane is the plane of the Milky Way Galaxy, and follows a line running more or less through the centre of the galaxy and inclined to the celestial equator by an angle of 62 degree.
Which is the nearest galaxy to our Milky Way Galaxy?
The Andromeda galaxy is situated at a distance of 2.2 x106 light years from us. Under good sky conditions, it can even be seen with the naked eye in the constellation Andromeda.