Question

How many planets can be seen with the naked eye?
A) 3
B) 4
C) 5
D) None of these

Answer 1

First of all, we know that for a celestial body to be a planet, the criteria for it is that it must revolve around the sun, it must be round in shape due to its gravity, and there are no rock and ice debris very near to its surface.

Complete step by step solution:
Mercury is generally visible on the east-horizon side, and it can be seen before the rise of the sun and around twenty to thirty minutes before it. In May, Mercury's brightness is very high, and hence it is easy to locate.
We all are aware of the bright evening star, i.e., Venus. It is generally visible in the west side sky, and it can be seen as soon as after the sunsets. Venus sets about two and a half hours after the sun.
We can see mars on the horizon of the south-east at 2:00 am.
We can see Jupiter at the horizon of the east-southeast at 9:45 am.
Saturn is visible by the naked sky at night time around 1 am.
Therefore, we can see five planets by the naked eye, mainly Mercury, Venus, Mars, Jupiter, and Saturn

So, the correct answer is “Option C”.

Note:
One primary criterion that a planet is visible by the naked eye is that the all planets which are visible to us must be on the same side of the sun, i.e., if even one of the planets is on the other side of the sun, then it is not visible to us.