Which of the following celestial objects is typically the smallest?

• star

• moon

• nebula

• planet

Tags

NGSS.MS-ESS1-3

What do nebulae and stars have in common?

• They are primarily made of gases.

• They are smaller than solar systems.

• Their energy comes from nuclear fusion.

• There is at least one in every solar system.

Choose the correct ranking of celestial objects, from largest to smallest. (Note: This symbol > means “greater than.”)

• Nebula > Planet > Star > Galaxy

• Galaxy > Nebula > Star > Planet

• Nebula > Galaxy > Star > Planet

• Star > Planet > Galaxy > Nebula

Tags

NGSS.MS-ESS1-3

Which of the following is the most accurate number to use to describe the number of stars in a typical galaxy?

• Thousands

• Millions

• Billions

• Infinite

Which celestial object is largest in size?

• Milky Way

• Jupiter

• Sun

• Eagle nebula (which contains the Pillars of Creation)

Tags

NGSS.MS-ESS1-3

The Hubble Space Telescope has sent back amazing images of nebulae, including the Horsehead Nebula and the Ring Nebula. What is a nebula?

• a distant galaxy

• an ice field around outer planets

• an interstellar cloud of dust, hydrogen gas, helium gas and other ionized gases

• a meteor shower

Which of the following is not a type of galaxy?

• nebular

• irregular

• elliptical

• spiral

Astronomers tell us that our galaxy is which type of galaxy?

• lenticular galaxy

• barred spiral galaxy

• elliptical galaxy

• irregular galaxy

Which of the following is true of orbiting objects?

• Stars orbit around planets.

• Planets orbit around moons.

• Stars orbit around nebulae.

• Moons orbit around planets.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which statement is true about celestial objects?

• Galaxies are part of solar systems.

• Planets turn into nebulae.

• Galaxies have many stars.

• Solar systems have many stars.