What does the word nebula mean?

Fire or flame (from Latin) Cloud or mist (from Latin) Star nursery (from Greek) New star (from Arabic)

What causes an emission nebula to glow in pink and red colors?

The gas is very hot and glows like a flame Ultraviolet radiation from nearby hot young stars ionizes hydrogen gas, which glows red as it recombines The dust inside the cloud reflects red light from distant stars Iron particles in the cloud give it a red color

What is the Orion Nebula, and why is it famous?

It is a planetary nebula around a dying star in our solar system It is a large emission nebula about 1,344 light-years away and is the brightest nebula visible to the naked eye in the Northern Hemisphere It is a dark nebula that blocks out background stars near Orion It is the remnant of a supernova explosion that happened 1,000 years ago

Why do reflection nebulae appear blue?

The gas in reflection nebulae emits blue light when heated They contain a lot of liquid water ice that appears blue Dust particles in the nebula scatter short-wavelength blue light more efficiently than red light They absorb all light except blue, which passes through

What is a dark nebula?

A nebula in a part of the sky where there are no stars A nebula filled with dark matter A nebula that absorbs visible light and emits only radio waves A dense cloud of dust that blocks the light from stars and nebulae behind it

What are the Pillars of Creation?

Ancient stone monuments found on the surface of Mars Jets of material fired from the poles of a black hole Towering columns of gas and dust inside the Eagle Nebula where new stars are actively forming The outer edge of our solar system where the Sun's wind meets interstellar space

What is a planetary nebula?

A cloud of gas surrounding a newly formed planet A nebula that is moving toward becoming a new solar system A glowing shell of gas expelled by a dying Sun-like star in the final stages of its life A cloud of gas and dust orbiting a planet as a ring

Why were planetary nebulae given that name if they have nothing to do with planets?

They orbit planets and were first found near Jupiter Through small early telescopes they looked like the round disc of a planet rather than a point of light They contain the remains of exploded planets They are only visible from planets in our solar system

What is a supernova remnant?

The core left behind after a star explodes A cloud of gas that has never had a star inside it An expanding shell of gas and debris blown outward by the explosion of a massive star A dark nebula formed from the ashes of an old star

What makes emission nebulae important for the future of star formation?

They produce oxygen that planets need to support life They are regions of ionized gas around young stars that also contain dense clumps of gas that can collapse to form new stars They clean up leftover material from old supernovae They reflect starlight to make the galaxy brighter

Which of the following is the correct pairing of nebula type and the process that creates it?

Supernova remnant — outer layers expelled by a dying Sun-like star Reflection nebula — gas ionized by ultraviolet radiation from hot young stars Planetary nebula — outer layers expelled by a dying Sun-like star Emission nebula — dust reflecting light from a nearby star