The Outer Space and Satellites

1. What primary observation supports the Big Bang theory's concept of an expanding universe?

• A) The sun is getting larger.
• B) New stars are being born.
• C) All galaxies are moving away from each other.
• D) The Earth's orbit is changing.

2. Why is a multi-stage launching system crucial for placing a satellite into orbit?

• A) To carry more astronauts into space.
• B) To avoid the satellite burning up from intense atmospheric friction.
• C) To make the rocket heavier and more stable.
• D) To ensure the launch is visible from the ground.

3. What is the name of the galaxy in which our Earth exists?

• A) Andromeda
• B) Milky-Way
• C) Alpha Centauri
• D) Sputnik

4. What force provides the necessary inward centripetal pull to keep a satellite in orbit around the Earth?

• A) The satellite's engine thrust
• B) The Earth's magnetic field
• C) The Earth's gravitational attraction
• D) The outward centrifugal force

5. According to modern science, what determines the observable size of the universe?

• A) The total number of galaxies
• B) The belief that space is infinite in its extension
• C) The distance to the nearest star, Alpha Centauri
• D) The farthest point in space from which light can reach us

6. What was the name of the first artificial satellite sent into outer space by the Soviet Union?

• A) Explorer-I
• B) Vostok-1
• C) Sputnik 1
• D) Intelset-1

7. According to the text, what are the objects that revolve around planets called?

• A) Stars
• B) Galaxies
• C) Satellites
• D) Comets