Fill in the following blanks with suitable words :
Orion constellation can be used to locate the position of…………………….star whereas Ursa Major constellation can be used to locate the ……………………….star in the night sky.

Explanation

To fill in the blanks in the given statement, we can follow these steps:

1. **Identify the first blank**: The question states that the Orion constellation can be used to locate a specific star. The brightest star in the night sky is Sirius, which is often associated with the Orion constellation. Therefore, we can fill in the first blank with "Sirius".

2. **Identify the second blank**: The Ursa Major constellation is known for helping to locate the Pole Star, also known as Polaris. This star is significant because it is positioned almost directly above the North Pole and is used for navigation. Thus, we can fill in the second blank with "Pole Star".

So, the completed statement is:
"Orion constellation can be used to locate the position of **Sirius** star whereas Ursa Major constellation can be used to locate the **Pole Star** in the night sky."