When you gaze at the night sky, it's obvious that the various stars are different; some shine more brightly than others, and some have noticeable colors. Scientists classify stars according to these two characteristics, but they do it with sensitive instruments that provide much more detail than stargazers—even ones with powerful telescopes—could ever manage to discern. In other words, scientists classify stars according to their luminosity and temperature, as determined by spectral analysi
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Answer:
C
Explanation:
On 18 June 1940, Churchill gave a rousing speech to the British people, announcing: '… the Battle of France is over. ... On 15 September 1940, which became known as 'Battle of Britain' day, the RAF destroyed a huge formation of Luftwaffe over London and the South, forcing Hitler to postpone plans to invade Britain
