This glossary will help you understand the intricacies of celestial motion and uncover the key terms and concepts related to planetary orbits.

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In 1995, astronomer/scientist Michel Mayor and Didier Queloz found the first discovered exoplanet. An exoplanet is a planet that is orbiting or is located outside our Solar system and could potentially pitch its own life. Today we’ll check out some of NASA’s top hits with Earth-like habitable exoplanets and see how they could hold life.

Lived 1048 - 1131. In the year 1072 AD, Omar Khayyam documented the most accurate year length ever calculated - a figure still accurate enough for most purposes in the modern world. Khayyam was an astronomer, astrologer, physician, philosopher, and mathematician: he made outstanding contributions in algebra. His poetry is better known in the West