Scale of the Universe

The star at the center of our solar system.

• Sun
• moon
• orbit
• axis

A large body made of gas or rock that orbits around a star.

• planet
• moon
• star
• super nova

A rocky body that orbits around a planet.

• moon
• star
• axis
• Sun

Galaxy is a collection of

• a star and the planets and asteroids that orbit around it

• thousands of stars

• billions of stars

• millions of stars

The galaxy we are a part of is called:

• Milky Way

• Andromeda

• Whirlpool

• Sombrero

From smallest to the largest

• universe, solar system, galaxy

• galaxy, solar system, universe

• solar system, universe, galaxy

• solar system, galaxy, universe

Millions of pieces of rocky material of various sizes orbit the Sun between the orbits of Mars and Jupiter. These objects are known as -

• Asteroids
• Meteors
• Comets
• Planets

A large celestial body made of gases that emits light due to nuclear reactions is called -

• a galaxy
• a nebula
• a comet
• a star 

A large ball of gas that generates energy by fusing hydrogen atoms

• Galaxies
• Star
• Nebule
• Black holes

How many of the stars visible in the night sky are closer to Earth than to the Sun?

• All of them
• None of them
• About half
• Only one