A comet is in elliptical orbit around the sun. In this orbit the comet's smallest distance from the sun is `72xx10^(6)m` and its largest distance from the sun is `144xx10^(6)m`. The ratio of comet's maximum speed to the minimum speed in the orbit is(Neglect the presence of all bodies other than the sun and comet).

A planet is revolving around the Sun in an elliptical orbit. Its closest distance from the sun is r_(min) . The farthest distance from the sun is r_(max) if the orbital angular velocity of the planet when it is nearest to the Sun omega then the orbital angular velocity at the point when it i at the farthest distanec from the sun is

The mean radius of the earth's orbit round the sun is 1.5xx10^(11) . The mean radius of the orbit of mercury round the sun is 6xx10^(10)m . The mercury will rotate around the sun in

The largest and the shortest distance of the earth from the sun are r_1 and r_2 . Its distance from the sun when it is at pependicular to the major-axis of the orbit drawn from the sun is .........

The largest and the shortest distance of the earth from the sun are r_(1) and r_(2) , its distance from the sun when it is at the perpendicular to the major axis of the orbit drawn from the sun

The Sun's angular diameter is 30''. The distance of Earth from Sun is 1.496xx10^(11) m , then find the diameter of the Sun. (1''= 4.85xx10^(-6) rad)

The distance of two planets from the sun are 10^(13) m and 10^(12) m respectively. The ratio of time period of the planets is ........

A satellite of mass m is in an elliptical orbit around the earth of mass M(M gt gt m) the speed of the satellite at its nearest point ot the earth (perigee) is sqrt((6GM)/(5R)) where R= its closest distance to the earth it is desired to transfer this satellite into a circular orbit around the earth of radius equal its largest distance from the earth. Find the increase in its speed to be imparted at the apogee (farthest point on the elliptical orbit).

A planet of mass m is moving in an elliptical orbit about the sun (mass of sun = M). The maximum and minimum distances of the planet from the sun are r_(1) and r_(2) respectively. The period of revolution of the planet wil be proportional to :

How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 xx 10^(8) km.

The Sun's angular diameter is measured to be 1920". The distance D of the Sun from the Earth is 1.496xx109^(11) m. What is the diameter of the Sun ?