Lagadha, an ancient Indian astronomer, is credited with the first recorded cometary observation in his work, the Vedanga Jyotisha.

Lagadha observed Halley's Comet in 134 BCE, making it the first recorded observation of this iconic comet.

Brihaspati, an Indian astronomer from the 6th century CE, compiled a catalog of comets in his work, the Jyotisha-Ratnakara.

Brihaspati observed Halley's Comet in 531 CE, providing valuable data for understanding its orbital period and trajectory.

Brahmagupta, an Indian astronomer and mathematician from the 7th century CE, wrote a treatise on comets in his work, the Brahma-Sphuta-Siddhanta.

Brahmagupta observed Halley's Comet in 684 CE, contributing to the understanding of its periodic nature.

Varāhamihira, an Indian astronomer and astrologer from the 6th century CE, made detailed observations of comets and recorded them in his work, the Brihat Samhita.

Varāhamihira observed Halley's Comet in 531 CE, providing valuable information about its appearance and trajectory.

Utpala, an Indian astronomer from the 10th century CE, wrote a commentary on Varāhamihira's work on comets, providing additional insights and interpretations.

Utpala observed Halley's Comet in 989 CE, contributing to the long-term record of observations of this iconic comet.

Bhāskara II, an Indian astronomer and mathematician from the 12th century CE, compiled a comprehensive treatise on comets in his work, the Siddhānta-Śiromani.

Bhāskara II observed Halley's Comet in 1145 CE, providing valuable data for understanding its orbital characteristics.

Nilakantha Somayaji, an Indian astronomer and mathematician from the 16th century CE, made significant contributions to the study of comets, including developing a method for calculating cometary orbits.

Nilakantha Somayaji observed Halley's Comet in 1531 CE, contributing to the understanding of its periodic nature and orbital characteristics.

Jyeṣṭhadeva, an Indian astronomer from the 17th century CE, wrote a treatise on comets in his work, the Jyotisha-Ratnakara.

Jyeṣṭhadeva observed Halley's Comet in 1607 CE, providing valuable data for understanding its orbital period and trajectory.