Final answer:
The analogy Earth=heaven, Venus=hell refers to the atmospheric conditions of the two planets, with Earth being hospitable to life and Venus having extremely harsh and inhospitable environmental conditions.
Step-by-step explanation:
The analogy that the statement Earth=heaven, Venus=hell implies is related to atmospheric conditions. This analogy does not refer to heavenly bodies in a religious sense, nor does it pertain to the sizes of the planets. Instead, it draws a comparison based on the drastically different environmental conditions that characterize each planet.
Earth with its life-sustaining environment, is likened to 'heaven' while Venus with its extreme heat crushing atmospheric pressure, and noxious gases, is equated to 'hell'. The reasons for these differences include factors like Venus's dense CO2-heavy atmosphere which creates a runaway greenhouse effect leading to surface temperatures hot enough to melt lead. Such conditions on Venus present a stark contrast to the relatively moderate and hospitable environment of Earth.