In a certain binary star system, each star has the same mass as our sun. They revolve about their centre of mass. The distance between them is the same as the distance between earth and the sun. What is their period of revolution in years ?

In a certain binary-star system, each star has the same mass as our Sun, and they revolve about their center of mass. The distance between them is the same as the distance between Earth and the Sun. What is their period of revolution in years ?

In a binary star system one star has thrice the mass of other. The stars rotate about their common centre of mass then :

What is the distance between the earth and proxima centauri star?

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

The time take Mars to revolve round the sun is 1.88 years.Find the ratio of average distance between mars and the sun to that between the earth and the sun.