Why does Mars exhibit retrograde motion in the sky? Mars orbits the Sun in the opposite direction as the Earth.

As Mars overtakes and passes the Earth in its orbit, Mars appears to move backwards.

As the Earth overtakes and passes Mars in its orbit, Mars then appears to move backwards.

When Mars and the Earth are on opposite sides of the Sun, it can no longer be seen at night.

What is the reason?

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.