The planet Venus rotates extremely slowly on its axis, completing one full rotation relative to the background stars (one sidereal day) in approximately 243 Earth days. What is the magnitude of the angular speed of Venus about its rotational axis?
4.8×10−8 rad s−14.8 \times 10^{-8} \text{ rad s}^{-1}4.8×10−8 rad s−1
1.8×10−5 rad s−11.8 \times 10^{-5} \text{ rad s}^{-1}1.8×10−5 rad s−1
3.0×10−7 rad s−13.0 \times 10^{-7} \text{ rad s}^{-1}3.0×10−7 rad s−1
1.1×10−3 rad s−11.1 \times 10^{-3} \text{ rad s}^{-1}1.1×10−3 rad s−1
