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Because. we can't see low luminosity stars when they're far away. Only the high luminosity ones. If the radius of star A is twice the radius of star B, but both have similar temperatures, how do their luminosities compare? Star A is 4 times as luminous as Star B. The lower left corner of the HR diagram has. the hottest and least luminous stars.
- ASTRO 7N -UNIT 3 PART 3 (quiz) Flashcards | Quizlet
The number of technological civilizations in the Milky Way....
- ASTRO 7N -UNIT 3 PART 3 (quiz) Flashcards | Quizlet
The number of technological civilizations in the Milky Way. Study with Quizlet and memorize flashcards containing terms like What is the density at the center of a black hole?, Why are things torn apart when they near a black hole?, Which of the following statements is true? and more.
Study with Quizlet and memorize flashcards containing terms like Stars come in a variety of sizes, luminosities, and temperatures (and then colors).
20 kwi 2020 · Can you choose the ASTRO 7N Example Test 2? Test your knowledge on this science quiz and compare your score to others. Quiz by sam-roberto
Star A is 4 times as luminous as Star B. Star A is 2 times as far away as Star B. Which star appears brighter and by how much? The stars appear the same brightness.
A: only high mass stars formed near to us in the Galaxy. B: the most luminous stars are giants and supergiants that have already finished their main sequence lifetimes. C: our region of the Galaxy is very young. D: the main sequence is the shortest part of a star’s life so stars do not spend much time there.
Study with Quizlet and memorize flashcards containing terms like What does the main sequence mean?, What is a planetary nebula?, A high-mass star dies more violently than a low-mass star because: and more.
