Nebulae and Their Types

What is the primary source of light for emission nebulae?

• Reflected light from nearby stars

• Ultraviolet light from nearby stars energizing atoms

• Light from the nebula's own core

• Scattered light from dust grains

Why do reflection nebulae often appear bluish?

• They emit blue light naturally

• They reflect blue light from nearby stars

• Dust grains scatter blue light more efficiently

• They absorb red light

What makes absorption nebulae difficult to detect?

• They emit very little light

• They are too small to be seen

• They are too far away

• They block light from objects behind them

What causes the formation of planetary nebulae?

• A massive star's explosion

• A small to medium-sized star shedding its outer layers

• The collision of two stars

• The gravitational collapse of a nebula

Why is the term 'planetary nebula' considered misleading?

• They are not related to planets

• They are not nebulae

• They are not visible through telescopes

• They do not emit light