What Is Remarkable About the Supernova Remnant Cassiopeia A

question 128

Multiple Choice

What is remarkable about the supernova remnant Cassiopeia A?

• A) Cassiopeia A contains a binary neutron star system in which one neutron star is significantly more massive than the other.
• B) Cassiopeia A is bright at all wavelengths from radio and visible light to X-rays.
• C) Cassiopeia A is the nearest supernova remnant, located only about 300 ly from Earth.
• D) Cassiopeia A shows that a supernova occurred in the Galaxy about 300 years ago, but there is no record of any supernova having been seen at that time.

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Definitions:

Unequal Variance

A condition in statistical analysis where the variability among data sets being compared is not the same.

Studentized Range

A statistical measure used in various tests, including ANOVA, to account for variability when comparing ranges of data sets.

Population Means

The average value of a population parameter.

Sum of Squares

A statistical technique used to measure the variation or dispersion of a set of numbers, calculated by summing the squares of differences from the mean.