Dutta lived on the outskirts of Kolkata. He had a secret ambition to discover a comet. When he retired, he bought an 8-inchc telescope. He named it ‘dibyachakshu’. His wife called it simply dibya. Duttada, as he was popularly known, spent many nights looking at the stars through dibya. 

one moonless night, Duttada detected a new faint star. in fact, it was a new comet. after watching it for two nights, he informed the indian institute of astrophysics at Bangalore. They confirmed that Duttada had discovered a new comet. The comet was called ‘comet Dutta .

Duttada is a character in the story "Madam Rides the Bus" by Vallikkannan. He is a middle-aged man who works as a clerk in an office in Calcutta. He is a regular passenger on the bus that the protagonist, Rosie, takes to work.

Appearance
Duttada is described as a middle-aged man with a balding head and a thick mustache. He wears a white dhoti and a shirt, which are typical clothing for Indian men.

Personality
Duttada is a reserved and serious person who does not talk much with other passengers on the bus. He is always seen reading a book or a newspaper during his commute. He is also shown to be observant, as he notices the changes in Rosie's behavior and appearance over time.

Relationship with Rosie
Duttada and Rosie do not interact much initially, but as the story progresses, Duttada becomes a confidant for Rosie. She confides in him about her desire to learn English and her struggles as a working woman. Duttada is supportive of her goals and even lends her his English books to read.

Role in the story
Duttada's character serves as a contrast to Rosie's outgoing and talkative nature. He represents the traditional Indian society, which values privacy and restraint. However, he also shows that there are individuals who are willing to support and encourage women like Rosie in their pursuit of education and independence.

Conclusion
Duttada is an important character in "Madam Rides the Bus" who adds depth to the story. He is a reserved and serious person who becomes a confidant and supporter for Rosie. His character represents the traditional Indian society, but also shows that there are individuals who are willing to break from tradition and support women in their pursuit of education and independence.