Chapter 1. Nebulae and Protostars

Map Learning Exercises

Nebulae and Protostars

Question Which nebulae is most reddened by interstellar dust?

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{"title":"selection","description":"The light from this nebula has been greatly \"reddened\" by interstellar dust. This is much like the way that dust in our atmosphere can make a sunset sky turn red. (Please note that this \"reddening\" is NOT related to the colors of the stars in the nebula, or the motion of this nebula in relationship to Earth.)","type":"correct","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"117,181,65\"}]"} {"title":"selection COPY","description":"Incorrect","type":"incorrect","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"371,172,64\"}]"}
Correct.
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Question Which stars are closer to us than the "Cosmic Gecko"?

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{"title":"selection","description":"ANY star that you might have selected in the black field of the Cosmic Gecko Dark Nebula would probably be right. The Gecko is so dense that he blocks virtually all visible light from the stars that are behind it. Any star that you can see with your eyes is most likely closer to us than the Gecko.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"rect\",\"coords\":\"214,14,278,195\"},{\"shape\":\"rect\",\"coords\":\"278,129,390,195\"}]"} {"title":"selection COPY","description":"Incorrect","type":"incorrect","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"102,191,91\"}]"}
Correct.
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Question Stars giving rise to more stars.

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{"title":"selection","description":"High-speed particles and ultraviolet radiation from young O and B stars produce a shock wave that compresses gas farther into the molecular cloud, stimulating new star formation deeper into the cloud.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"347,170,34\"}]"} {"title":"selection COPY","description":"Incorrect","type":"incorrect","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"228,163,46\"}]"} {"title":"selection COPY COPY","description":"Incorrect","type":"incorrect","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"228,163,46\"},{\"shape\":\"circle\",\"coords\":\"80,169,71\"}]"}
Correct.
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Question Older peaceful stars....

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{"title":"selection","description":"Incorrect","type":"incorrect","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"347,170,34\"}]"} {"title":"selection COPY","description":"Incorrect","type":"incorrect","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"228,163,46\"}]"} {"title":"selection COPY COPY","description":"It is likely that there are no remaining O and B stars left in this cluster. It is probable that any O and B stars that used to be part of this cluster have already run through their time on the main sequence.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"circle\",\"coords\":\"228,163,46\"},{\"shape\":\"circle\",\"coords\":\"80,169,71\"}]"}
Correct.
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