The Indian Space Research Organisation built India first satellite, which was named what?

Introduction / Context:
India progress in space technology is a popular topic in general knowledge and competitive exams. One of the most important milestones is the launch of the country first satellite, which marked India entry into the space age. This satellite was designed and built by the Indian Space Research Organisation and launched with the help of another country rocket. The question asks you to recall the name given to this historic first satellite.

Given Data / Assumptions:

• We are concerned with India first satellite, not the first rocket or later communication satellites.
• The satellite was built by ISRO.
• Options include Aryabhata, Bhaskara, Rohini and Insat 1A.

Concept / Approach:
India first satellite was named Aryabhata, in honour of the ancient Indian mathematician and astronomer. It was launched in 1975 with the help of the Soviet Union. Later satellites such as Bhaskara were used for Earth observation, Rohini series were launched on Indian rockets and Insat 1A was part of a communication satellite series. Therefore, only Aryabhata matches the description of the first Indian satellite built by ISRO.

Step-by-Step Solution:
Step 1: Recall that the name Aryabhata is strongly associated with India first satellite launched in the mid nineteen seventies. Step 2: Remember that Bhaskara was launched later as a remote sensing satellite, not the first one. Step 3: Note that the Rohini series were linked with India own launch vehicles such as SLV, coming after Aryabhata. Step 4: Insat 1A belongs to the Insat series of communication satellites that came later and were not the first Indian satellite. Step 5: Compare all this information and identify Aryabhata as the unique correct answer.

Verification / Alternative check:
Many school textbooks on science and Indian achievements mention the launch of Aryabhata in 1975 as a key event. General knowledge books frequently include a table listing Indian satellites along with their launch years and purposes, with Aryabhata clearly listed first. This consistency across multiple sources confirms that the first Indian satellite built by ISRO was named Aryabhata, not Bhaskara, Rohini or Insat 1A.

Why Other Options Are Wrong:
Bhaskara: This was a later Earth observation satellite and not the first satellite built by India.

Rohini: This name refers to a series of satellites used to test and demonstrate India own launch vehicles; these flights came after the launch of Aryabhata.

Insat 1A: This communication satellite belongs to a different period in Indian space history and is not the first satellite built by ISRO.

Common Pitfalls:
Students sometimes confuse the chronological order of satellites, especially when names like Aryabhata and Bhaskara both refer to famous Indian astronomers. A simple way to remember is that Aryabhata, whose historical work predates many others, is associated with the first satellite. Bhaskara and the later series like Insat and Rohini belong to more specialised missions that followed afterwards.

Final Answer:
India first satellite built by ISRO was named Aryabhata.