Space science and astronomy

Question 1

How much stars does our galaxy have?

Answer 1

Billions

Question 2

What does the weight of an object depend upon?

Answer 2

Its mass and its gravitational field strength.

Question 3

What is a star?

Answer 3

A large mass at the centre of a solar system [if there are other bodies present] that produces heat and light.

Question 4

What is a galaxy?

Answer 4

A cluster of billions of stars.

Question 5

What is the light year?

Answer 5

The distance travelled by light in one year.

Question 6

In the solar system, what objects orbit around it?

Answer 6

Planets, comets and asteroids.

Question 7

How many planets in the solar system are there, and what is the order in which they are closest to the sun?

Answer 7

Eight, with the closest to furthest planets being:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune

Question 8

Objects orbiting the sun include?

Answer 8

Comets, asteroids and dwarf planets.

Question 9

What is a satellite?

Answer 9

An object in orbit around a planet.

Question 10

What is the Earth’s natural satellite?

Answer 10

The Moon

Question 11

What is gravity?

Answer 11

The force of attraction between all objects.