Astronomers want to study a star in the Andromeda galaxy, the closest galaxy to our own.
2 answers:
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The Sahara is a desert located in northern Africa (as you can see in the map). And one of the only answer countries in proximity to that desert is Mali, so the answer would be C.
Answer:
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Answer:
Explanation:
The formula for apparent brightness is given by the next inequation:
Where B equals apparent brightnes, L equals luminosity and D equals distance.
SO we just have to clear distance from the formula and are left with the inequation to calculate distance: