Aryabhata, the famous astronomer, lived during the reign of Chandragupta-II. Let's understand this in detail:

- Aryabhata was a renowned Indian mathematician and astronomer who made significant contributions to the field of mathematics and astronomy during the Gupta Empire in ancient India. He was born in 476 CE in Kusumapura, which is present-day Patna in Bihar, India.

- The Gupta Empire was a powerful dynasty that ruled over northern and central India from around 320 to 550 CE. The empire was known for its prosperity, cultural achievements, and patronage of scholars, artists, and scientists.

- Chandragupta-II, also known as Chandragupta Vikramaditya, was one of the most notable rulers of the Gupta Empire. He ascended the throne around 380 CE and ruled until 415 CE. Chandragupta-II was a patron of the arts and sciences and is credited with expanding the Gupta Empire through military conquests and strategic alliances.

- During his reign, Chandragupta-II established a vibrant court that attracted scholars, intellectuals, and artists from different parts of India and beyond. It was in this court that Aryabhata flourished and made his groundbreaking contributions to astronomy.

- Aryabhata's most significant work was the Aryabhatiya, a treatise that covered various aspects of mathematics and astronomy. In this work, Aryabhata presented his theories on the motion of celestial bodies, the calculation of eclipses, and the determination of planetary positions.

- Aryabhata's work had a profound impact on the development of astronomy in ancient India and influenced subsequent scholars and astronomers. His accurate calculations and theories laid the foundation for future advancements in the field.

- Chandragupta-II's patronage of scholars like Aryabhata highlights the empire's commitment to intellectual pursuits and the promotion of knowledge. The court of Chandragupta-II served as a hub for scientific and cultural exchange, fostering an environment conducive to innovation and learning.

In conclusion, Aryabhata, the famous astronomer, was a prominent figure in the court of Chandragupta-II, who ruled over the Gupta Empire. His contributions to astronomy and mathematics during this period had a lasting impact on the field and helped shape the scientific knowledge of ancient India.