Two heavenly bodies ${S_1}$ and ${S_2}$, not far off from each other are seen to revolve in orbits
Two heavenly bodies ${S_1}$ and ${S_2}$, not far off from each other are seen to revolve in orbits
- A
Around their common centre of mass
- B
Which are arbitrary
- C
With ${S_1}$ fixed and ${S_2}$ moving round ${S_1}$
- D
With ${S_2}$ fixed and ${S_1}$ moving round ${S_2}$
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