Nebulosa

The term 'nebulae' was initially used for objects that appeared fuzzier than stars. Many of these were later identified as galaxies. Nebulae form in different ways, such as from the remnants of exploded stars, dimming small stars, or interstellar gas held by gravity.

What was the original use of the term 'nebula'?

• To describe objects fuzzier than stars

• To identify planets

• To classify comets

• To name constellations

What did astronomers later identify many of the objects initially called nebulae as?

• Asteroids

• Comets

• Galaxies

• Planets

How can nebulae form from stars?

• Through the explosion of stars

• By the evaporation of asteroids

• By the collision of planets

• From the fusion of comets

What happens to small stars that contribute to nebula formation?

• They explode

• They evaporate

• They dim

• They collide

What holds interstellar gas together to form a nebula?

• Magnetic fields

• Dark matter

• Its own gravity

• Solar winds