Question

when venus passes between the earth and the sun, it is visible as a tiny black dot on the suns bright disk. why is mars never visible in the same way?
a the orbit of mars is more eccentric than that of venus.
b mars shines too brightly to be visible against the sun.
c mars is too small to be seen against the backdrop of the sun.
d the orbit of mars is outside that of the earths orbit.

Explanation:

Step1: Understand the transit phenomenon

A transit occurs when a celestial body passes between the Earth and the Sun.

Step2: Analyze the orbits

Venus has an orbit inside Earth’s orbit. Mars has an orbit outside Earth’s orbit. So, Mars cannot come between Earth and the Sun like Venus does.

Step3: Evaluate other options

• Option A: Orbit eccentricity is not related to the transit phenomenon.
• Option B: Mars’ brightness is not the reason for no transit.
• Option C: Size is not the key factor here. The orbital position is crucial.

Answer:

D. the orbit of Mars is outside that of the Earth’s orbit.