Hubble's Field Guide to Nebulae

The video explores various types of nebulae, including emission, reflection, absorption, planetary nebulae, and supernova remnants. It highlights the role of the Hubble Space Telescope in capturing detailed images of these celestial phenomena. Emission nebulae, like the Orion and Carina Nebulae, emit their own light, while reflection nebulae shine by scattered light. Absorption nebulae are dark clouds blocking light from behind. Planetary nebulae are formed by dying stars, and supernova remnants are the result of massive star explosions. The video emphasizes the beauty and scientific importance of nebulae in understanding the universe.

What is the primary source of light for emission nebulae?

• Reflected light from nearby stars

• Ultraviolet light from nearby stars

• Scattered light from cosmic dust

• Light from the nebula's own stars

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, leaving blue

What makes absorption nebulae difficult to detect?

• They emit very faint light

• They are too small to observe

• They are hidden behind other nebulae

• They block light from objects behind them

What causes the formation of a planetary nebula?

• A massive star's explosion

• The gravitational collapse of a star

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

• The collision of two stars

Why is the term 'Planetary Nebula' considered misleading?

• They do not form around planets

• They do not have a planetary shape

• They are not visible from Earth

• They are not related to planets