GENERAL KNOWLEDGE

GK

SOLAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Brad is doing his homework by making a chart that shows the position of a constellation and the planet Mars for a month. Each week Mars moves its location, but the stars in the constellation stay the same. Why does Mars move differently?
A
Mars orbits the constellation
B
Earth orbits Mars
C
Earth Orbits a Constellation
D
Mars orbits the Sun
Explanation: 

Detailed explanation-1: -As Mars orbits the Sun, it completes one rotation every 24.6 hours, which is very similar to one day on Earth (23.9 hours). Martian days are called sols – short for “solar day.” A year on Mars lasts 669.6 sols, which is the same as 687 Earth days.

Detailed explanation-2: -If you were to look up in the eastern sky at the same time each night and note where Mars appears to be compared to the constellations of stars, you would find the planet a little farther east with each viewing. That is, Mars appears to move from west to east from one night to the next.

Detailed explanation-3: -We now understand that the reason the planets only appear to move through certain constellations is that they travel in a plane around the sun and that they are so much closer to us than the background stars.

There is 1 question to complete.