8 words in this vocabulary list
noun the branch of astronomy that deals with the physical and chemical properties of celestial bodies and the universe as a whole
noun a large, bowl-shaped cavity in the ground or on the surface of a planet or the moon, typically caused by an explosion or the impact of a meteorite
noun a compound of phosphorus with a more electropositive element or group
noun a scientist who specializes in the study of life in the universe
noun a celestial object that is the collapsed core of a massive star after a supernova explosion, consisting almost entirely of neutrons
noun a planet with a mass larger than Earth's but smaller than that of the solar system's ice giants
noun the original evolution of life or living organisms from inorganic or inanimate substances
adjective relating to the study of the Earth's upper atmosphere and ionosphere