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Vocabulary Kate Hill

Astronomy the study of objects and matter outside the earth's atmosphere and of their physical and chemical propertie
Axis An imaginary line that divides something into equal or roughly equal halves, esp. in the direction of its greatest length
Rotation he action or process of rotating on or as if on an axis or center (2) : the act or an instance of rotating something
Revolution Rotating while moving around another object
Orbit The curved path of a celestial object or spacecraft around a star, planet, or moon, esp. a periodic elliptical revolution
Solstice : either of the two points on the ecliptic at which its distance from the celestial equator is greatest and which is reached by the sun each year about June 22 and December 22
Equinox either of the two points on the celestial sphere where the celestial equator intersects the ecliptic
Force strength or energy exerted or brought to bear : cause of motion or change
Gravity the gravitational attraction of the mass of the earth, the moon, or a planet for bodies at or near its surface
Law of Universal Gravitation states that every particle of matter in the universe attracts every other particle with a force directly proportional to the products of their masses and inversely proportional to the square of the distance between them
Mass A coherent, typically large body of matter with no definite shape.
Weight A body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
Inertia a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force
Newton's 1st law of motion a body remains at rest or in motion with a constant velocity unless acted upon by an external force
Phrase particular appearance or state in a regularly recurring cycle of changes
Eclipse the total or partial obscuring of one celestial body by another
Solar Eclipse n eclipse of the sun by the moon
Lunar Eclipse an eclipse in which the full moon passes partially or wholly through the umbra of the earth's shadow
umbra a conical shadow excluding all light from a given source; specifically : the conical part of the shadow of a celestial body excluding all light from the primary source
Penumbra a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light
Telescope a usually tubular optical instrument for viewing distant objects by means of the refraction of light rays through a lens or the reflection of light rays by a concave mirror
Maria Galileo called the moon's dark spots "maria" because it means sea in Latin.
Crater a depression formed by an impact (as of a meteorite)
Meteoroid a meteor particle itself without relation to the phenomena it produces when entering the earth's atmosphere
Created by: we5hills