Meaning of Tragedy:
Tragedy is a genre of literature, especially drama, that presents a serious and somber story with a sad or unfortunate ending. It often involves the downfall of the protagonist due to a fatal flaw or a series of unfortunate events. Tragedies evoke feelings of pity and fear in the audience, as they witness the suffering and downfall of the characters.

Summary of Chapter 4 - An Indian-American Women in Space: Kalpana Chawla:
The chapter narrates the inspiring story of Kalpana Chawla, an Indian-American astronaut who made history by becoming the first woman of Indian origin to travel to space. Despite facing numerous challenges and obstacles, Kalpana persevered and fulfilled her dream of becoming an astronaut.

Key Points:
- Kalpana Chawla's journey from India to the United States to pursue her passion for aeronautical engineering.
- Her determination and hard work that led her to be selected as an astronaut by NASA.
- The tragic end to her life when the space shuttle Columbia disintegrated during re-entry, leading to the loss of Kalpana and her crewmates.
Through Kalpana Chawla's story, the chapter highlights the triumphs and tragedies of human life, showcasing the resilience and courage needed to overcome obstacles and pursue one's dreams, even in the face of adversity.