Hello,

If you want to be an astronaut by pursuing B.Tech. so you should go for B.Tech with aerospace or aeronautical engineering. Some best Institutes where you can pursue above courses are enlistes below :-

• IIT Bombay
• IIT Kanpur
• IIT Madras
• Indian Institute of Space Science and Technology, Thiruvananthapuram
• Manipal Institute of Technology, Manipal
• Punjab Engineering College, Chandigarh
• Madras Institute of Technology, Chennai

For more colleges you should visit our page .

Good Luck!!