Does the sun exert same gravitational pull on the earth at-time during a year ?

The earth is acted upon by the gravitational force of attraction due to the sun. Then why does the earth not fall towards the sun ?

What would be the duration of the year if the distance between the earth and the sun gets doubled ?

The mass of a spherical planet is 5 times the mass of the earth but it’s diametre is the same as that of the earth, how much work is done in lifting a stone of mass 3 kg through a distance of lm on the planet.

The gravitational force exerted by the sun on the moon is greater than that exerted by the earth on the moon. Why then does not the moon escape from the earth.

The density of air near the earth's surface is 1.3kg m^-3 and the atmosphere pressure is 1.0xx10^5Nm^-2 . If the atmosphere has uniform density, same as that observed at the surface of the earth , what would be the height of the atmosphere to exert the same pressure .