Explain the colors of emission nebulae. What will be an ideal ...

Answer to q. 1

The predominant bright red is the emission from ionized hydrogen, heated to over 3,000 K by the ultraviolet radiation of imbedded O and B type stars. Other colors come from emission lines of other atoms. Some blue light will be scattered by cooler dust particles as well.

Answer to q. 2

Hydrogen. On Earth hydrogen is a gas because of the pressure and temperature in our atmosphere. On Jupiter and Saturn, it can be liquid and have the properties of a metal because of the much higher temperatures and pressures.

Answer to q. 3

Ionized helium is found only in O type stars, which should be blue-white in color; if the star appears orange, it must lie behind a thin dust cloud that is absorbing and scattering most of the shorter wave radiation that the star is sending into space; the star would, therefore, appear much blue and brighter if not for the dust cloud.

Answer to q. 4

FALSE

Answer to q. 5

Helium seems to be condensing and raining downward toward Saturn's mantle.

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