The time it takes the Earth to pass once around the Sun, particularly a tropical, sidereal, or anomalistic year.

(medicine) An incident wherein a person who suffers intermittent experiences of bronchioconstriction undergoes such an experience, usually with a sudden onset.

Not stable. / (electronics) Having multiple states, none of which is stable.

Synonym of tennessine

(astrology) Any of twelve signs, corresponding to constellations, that are used as the basis of astrology

A person who studies radio astronomy.

A surname from Italian.

(astronomy) The main asteroid belt, the region of the orbital plane of the Solar System located between the orbits of Mars and Jupiter which is occupied by numerous minor planets (asteroids) and the dwarf planet Ceres.

(astronomy) A set of orbits in a region that contains asteroids or similar minor planets arrayed as an annulus around the planetary system's orbital center.

The study of the motion of rockets and other spacecraft usually from Newton's laws of motion and Newton's law of universal gravitation.