SV. Answer the following.
1. How do stars differ from planets?
2. What makes the Earth a unique planer?
3. What are constellations? Name any two of
them.
4. List the planets in the order of their distance
from the Sun.
What are the different phases of the Moon?
6. Why do we get to see only one side of the
Moon from the Earth?
Answers
1.The Sun, a star, pictured alongside Jupiter and EarthThe 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.
2.Water World
To enable life, this most special of attributes, planet Earth has a number of ideal features. 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.
3.A group of stars forming some kind of recognisable figures or patterns are known as constellations. Orion and Ursa Major are the two constellations.
4.Mercury is the closest planet to our Sun, at just 58 million km (36 million miles) or 0.39 Astronomical Unit (AU) out.
Venus is the second closest planet to our Sun, orbiting at an average distance of 108 million km (67 million miles) or 0.72 AU.
EARTH-Our home, and the only planet in our Solar System (that we know of) that actively supports life. Our planet is the third from the our Sun, orbiting it at an average distance of 150 million km (93 million miles) from the Sun, or one AU.
Mars is the fourth planet from the sun at a distance of about 228 million km (142 million miles) or 1.52 AU.
Jupiter is the fifth planet from the Sun, at a distance of about 778 million km (484 million miles) or 5.2 AU.
Saturn is the sixth planet from the Sun at a distance of about 1.4 billion km (886 million miles) or 9.5 AU.
Uranus is the seventh planet from the sun at a distance of about 2.9 billion km (1.8 billion miles) or 19.19 AU. Neptune is the eighth and farthest planet from the Sun, at a distance of about 4.5 billion km (2.8 billion miles) or 30.07 AU.
5.New Moon.
Waxing Crescent.
First Quarter.
Waxing Gibbous.
Full.
Waning Gibbous.
Third Quarter.
Waning Crescent.
6.Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth – a situation known as synchronous rotation, or tidal locking. The Moon is directly illuminated by the Sun, and the cyclically varying viewing conditions cause the lunar phases.