Question

The star Aldebaran, otherwise known as Rōhini, has a mass of $1.16{\text{M}}_{\text{Sun}}$, where ${\text{M}}_{\text{Sun}}$ is the mass of the Sun. Express Rōhini’s approximate mass in ${10}^{30}\text{kg}$.

• A. 2.3

Answer 1

The correct option is A 2.3
Given:

Mass of the star Rohini, ${\text{M}}_{\text{R}}=$$1.16{\text{M}}_{\text{Sun}}$

${\text{M}}_{\text{Sun}}=2\times {10}^{30}\text{kg}$

${\text{M}}_{\text{R}}=1.16\times 2\times {10}^{30}=2.32\times {10}^{30}\text{kg}$

${\text{M}}_{\text{R}}\approx 2.3\times {10}^{30}\text{kg}$