# Aryabhata

**Aryabhata** (Sanskrit: आर्यभट, ISO: *Āryabhaṭa*) or **Aryabhata I**[3][4] (476–550 CE)[2][5] was the first of the major mathematician-astronomers from the classical age of Indian mathematics and Indian astronomy. His works include the *Āryabhaṭīya* (which mentions that in 3600 *Kali Yuga*, 499 CE, he was 23 years old)[6] and the *Arya-siddhanta*.

Āryabhaṭa | |
---|---|

Born | 476 CE |

Died | 550 CE[2] |

Academic background | |

Influences | Surya Siddhanta |

Academic work | |

Era | Gupta era |

Main interests | Mathematics, astronomy |

Notable works | Āryabhaṭīya, Arya-siddhanta |

Notable ideas | Explanation of lunar eclipse and solar eclipse, rotation of Earth on its axis, reflection of light by moon, sinusoidal functions, solution of single variable quadratic equation, value of π correct to 4 decimal places, diameter of Earth, calculation of the length of sidereal year |

Influenced | Lalla, Bhaskara I, Brahmagupta, Varahamihira, Kerala school of astronomy and mathematics, Islamic Astronomy and Mathematics |

For his explicit mention of the relativity of motion, he also qualifies as a major early physicist.[7]