Question

How big are stars, moon and planets compared to Earth?

Answer 1

Hint: We know that Sun being the largest star in the neighbourhood is much larger than the Earth. The other stars present in the universe are either comparable to the size of the Sun or bigger than that. The stars present in the universe are brighter and bigger than the Sun.

Complete step by step answer:
Even though the moon appears to be the biggest object in the night sky, it is very small compared to the Earth. The size of the moon appears to be largely due to its proximity with the Earth in comparison to other celestial bodies. The size of the moon is slightly greater than one-fourth to that of the Earth. Thus, the ratio of the size of the moon to Earth is $1:4$. The ratio of the size of the moon to that of the Earth is very small compared to other planets and its moon. Thus, the diameter of the moon is $3,474.2Km$ on the other hand the diameter of the Earth is around $12,742Km$.

Stars are of various sizes in the universe. The Sun being the largest star found in the neighbourhood of Earth is $109$ times the size of the Sun. The radius of the Sun is $1,392,000Km$ making it Earth’s dominant star. Other stars being $100$ times to $700$ times larger than the Sun, thus are much bigger than that of the Earth.

Note: The smallest star in the sky is Cygni, which is about $66$times the size of the Sun and it is present about $11.4$ light-years away from us, thus it is not visible in the night sky. The largest star known till date is UY Scuti, which is about $1700$ times larger than the Sun.