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BJU Space/Earth - 5

BJU - Space and Earth Science - Chapter 5

The fraction or percentage of the light shining on a planet or other nonluminous celestial object that it reflects. albedo
The point in the orbit of a planet or other object orbiting the sun where it is farthest from the sun. aphelion
A unit of astronomical distance equal to the average distance between Earth and the sun (150 million km or 93 million miles). astronomical unit
The large central gap in Saturn's ring system when viewed from Earth. The Cassini-Huygens mission to Saturn demonstrated that the Cassini Division actually contains thousands of thin rings. Cassini's Division
A special geometric figure that can best be described as a flattened circle. Given 2 points in a plane, an ellipse consists of all the other points in the plane such that the sum of their distances from the two given points is a constant. ellipse
A point of geometric significance in the description of a system of points or physical phenomena. One of 2 points used to define an ellipse. focus
Any of Jupiter's four largest moons that were named after their discoverer, Galileo Galilei. Galilean moons
One of the large, gaseous planets: Jupiter, Saturn, Uranus, or Neptune. Also called a Jovian planet.gas giant
A reddish colored, oval-shaped area within the atmosphere of Jupiter that is probably a centuries long storm system. Great Red Spot
One of the planets whose orbit is closer to the sun than the Earth's orbit. inferior planet
Resembling the planet Jupiter or pertaining to Jupiter or the Jupiter-like planets. Jovian
A measure of the amount of matter an object contains; not dependent on the force of gravity. mass
The eclipsing of a heavenly body such as a star or planet by the moon or another planet. occult
The point nearest the sun in the orbit of a planet or other sun-orbiting object. perihelion
The appearance of the moon according to the amount of the lighted side that is visible from Earth. phase
Any large body orbiting any star. One of the nine largest bodies orbiting the sun. planet
The apparent backward movement of the superior planets caused by the difference in orbital speed between Earth and the planet being observed. retrograde motion
A planet whose orbit is farther from the sun than the Earth's orbit. superior planet
The gravitational force measured at the actual or designated surface of a celestial object. surface gravity
The passage of an inferior planet across the sun's disk. transit
The force of gravity exerted on an object. weight
Created by: heidio