다음 중 글을 읽고 추론할 수 없는 것은?The star Sirius … | [기상직 9급 영어] 18년 1회차 기출문제 상세 페이지

다음 중 글을 읽고 추론할 수 없는 것은?
The star Sirius in the constellation of Canis Major appears considerably brighter than Rigel in Orion. However, Rigel is actually thousands of times brighter than Sirius. It appears fainter because it is over a thousand light years away, while Sirius is only $8\frac{1}{2}$ light years from us. We measure the brightness of the stars as seen with the naked eye on a scale called the magnitude scale. Hipparchus, a Greek astronomer, rated the importance of stars by their brightness and used the word magnitude to describe their relative brightness. Magnitude means bigness. In ancient times they may have assumed that the brighter star is a bigger star. A very bright star would have a magnitude of 1 or less and a very faint star a magnitude of 6. The smaller the number, the brighter the star. A very powerful telescope can see very faint stars beyond magnitude 20. You may be able to see stars with a magnitude of 6 to 7 with your naked eye under very clear, moonless skies.

A star with a magnitude of 2 appears brighter than a star with a magnitude of 3 in the night sky.

For Hipparchus, the star with a magnitude of 1 may have been more important than the star with a magnitude of 6.

Magnitude is a measure of how much light the star actually produces, not how bright it is.

Stars with a magnitude of 6 to 7 may be observed by your naked eye in total darkness.