Match the following: 1. The brightest star in the night sky a. Akash Ganga 2. A man-made object orbiting a planet b. Earth 3. Blue planet c. Artificial satellite 4. Milky Way galaxy d. An asteroid 5. Ceres e. Sirius

1. The brightest star in the night sky - e. Sirius Sirius is the brightest star in the night sky. Stars emit their own light. 2. A man-made object orbiting a planet - c. Artificial satellite Artificial satellites are the objects that revolve around the earth or other planet, and they are man-made objects. 3. Blue planet - b. Earth Earth looks blue from the space. It is the third planet from the Sun. 4. Milky Way galaxy - a. Akash Ganga Milky Way galaxy appears like a white and wide river in clear night sky. Earth, the planet we are living is in this galaxy. 5. Ceres - d. An asteroid Ceres is a large and rocky object which belongs to an asteroid family. This is orbiting around the Sun between Mars and Jupiter. 1. The brightest star in the night sky e. Sirius 2. A man-made object orbiting a planet c. Artificial satellite 3. Blue planet b. Earth 4. Milky Way galaxy a. Akash Ganga 5. Ceres d. An asteroid

What is a light-year? The distance between the earth and the sun is 150 × 10 6 km . Express this distance in a light year.

A Light year is the distance that light travels in one earth year and one light year is = 9 . 461 × 10 12 km . Distance of earth to sun is = 150 × 10 6 km . Distance of earth to sun in light-year = 150 × 10 6 9 . 461 × 10 12 = 1 . 58 × 10 - 5 light years.

E M B I B E

Expanded Universal Science>Chapter 17 - Stars and the Solar System>ASSESSMENT ZONE>Q D

EASY

8th CBSE

IMPORTANT

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Name the coldest planet in the solar system.

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Important Questions on Stars and the Solar System

MEDIUM

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 17 - Stars and the Solar System>ASSESSMENT ZONE>Q E

Match the following:

1. The brightest star in the night sky	a. Akash Ganga
2. A man-made object orbiting a planet	b. Earth
3. Blue planet	c. Artificial satellite
4. Milky Way galaxy	d. An asteroid
5. Ceres	e. Sirius