EXERCISES
1. Answer the following questions briefly
(a) How does a planet differ from a star?
(b) What is meant by the Solar System"?
(c) Name all the planets according to their distance from the sun
(d) Why is the Earth called a unique planet?
(e) Why do we see only one side of the moon always?
(1) What is the Universe ?
y Way Gala
The Universe
Answers
Answer:
a)The main difference between stars and planets is that stars have high temperatures compared to planets. ... Because they radiate energy, stars are very bright objects. Planets do not generate their own energy through nuclear reactions. They reflect some of the radiation coming from their parent star.
b)The term Solar System refers to the "family" of the Sun. The Sun is a star around which eight planets, among other celestial objects, revolve in orbits. This whole system of bodies is called the Solar System
c)In our Solar System, there are eight planets. The planets in order from the Sun based on their distance are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
d)It is unique among planets in our solar system for having water in its liquid form at the surface, in an amount conducive to life evolving.
e)One side of the moon always faces Earth because of what's called synchronous rotation.Because of synchronous rotation or tidal locking, our moon rotates on its axis in the same period that it revolves around the Earth in 27.32 days.
(1) What is universe?
The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
Explanation:
Hope it helps you.