Answer:
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A measure of the amount of light given off by a star is its absolute luminosity or magnitude. Absolute magnitude<span> is the measure of </span>intrinsic brightness<span> of a celestial object. It is the hypothetical </span>apparent magnitude<span> of an object at a standard </span>distance<span> of exactly 10 </span>parsecs<span> (32.6 </span>light years<span>) from the </span>observer<span>, assuming no </span>astronomical extinction<span> of starlight. </span>
Answer:
b. dred scott vs sandford
Explanation:
The correct answer is letter b.
It happened in 1857, when Dred Scott, an enslaved black man, whose owners had taken him from a slave-holding state to a slave-free state and then brought back to the slave-holding state. With this, he argued that since he was taken into free territory, he was legally free by the Constitution. The US supreme court then ruled that the constitution was not valid to a black person :(
