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sted below are the names, spectral types (in parentheses), and approximate masses of several nearby main-sequence stars. Rank the stars based on the distances to their habitable zones (from the central star), from shortest to longest.

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Answer:

From shortest distance to longest distance:

Barnard's Star (M4)

61 Cygnia A (K5)

Alpha Centauri A (G2)

Sirius (A1)

Spica (B1)

Explanation:

A habitable zone is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure. In the image, the green zone is the habitable zone, that is why Barnard's Star (M4) is first in the list and Spica (B1) is last in the list.

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