Which of the following stars is the hottest?

Question

BlackTom AI · Accepted Answer

To determine which star is the hottest, we need to recall the color–temperature relationship of stars. Blue colors indicate higher surface temperatures, while red colors indicate cooler surfaces.
Option a: The Sun. The Sun appears yellowish-white and has a surface temperature around 5800 K, which is hot but not the hottest among common stellar colors. Its color reflects a mid-range temperature rather than the extreme blue.
Option b: A yellow star. Yellow stars, like the Sun, have intermediate temperatures. They are cooler than blue stars but warmer than orange or red ones, so they are not the hottest.
Option c: A red star. Red stars have the coolest surface temperatures among the typical stellar colors, often well below 4000 K. This makes them far from being the hottest option.
Option d: An orange star. Orange stars are hotter than red and yellow stars but still cooler than blue stars; their color signals a lower temperature than blue.
Option e: A blue star. Blue stars exhibit the highest surface temperatures, often exceeding 10,000 K, which makes them the hottest among the listed options.
In summary, color temperature correlates with how hot a star’s surface is: blue means hottest, red means coolest, with yellow and orange in between. Therefore, among the given options, the blue star represents the greatest temperature.

Which of the following stars is the hottest?单项选择题

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