FACTOID # 48: Many Americans live alone - the United States leads the world in one person households.
 
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Encyclopedia > SN 1006

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Supernova K-12 Background Information for Lesson Plans & Science Fair Projects (3842 words)
A few supernovae, such as SN 1987K and 1993J, appear to change types: they show lines of hydrogen at early times, but, over a period of weeks to months, become dominated by lines of helium.
SN 1994D in the NGC 4526 galaxy (bright spot on the lower left).
If only one supernova is observed in a given year (as with SN 1006), no letter suffix is added to the name.
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