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Stack #4676441

QuestionAnswer
solar system the sun and all of the planets and other bodies that travel around it
heliocentric sun-centered
geocentric describes something that uses Earth as the reference point
parallax an apparent shift in the position of an object when viewed from different locations
gravity a force of attraction between objects that is due to their masses
orbit the path that a body follows as it travels around another body in space
aphelion in the orbit of a planet or other body in the solar system, the point that is farthest from the sun
perihelion the point in the orbit of a planet at which the planet is closest to the sun.
centripetal force the inward force required to keep a particle or an object moving in a circular path
solar nebula a rotating cloud of gas and dust from which the sun and planets formed
planetesimal a small body from which a planet originated in the early stages of development of the solar system
nuclear fusion the process by which nuclei of small atoms combine to form a new, more massive nucleus; the process releases energy
sunspot a dark area of the photosphere of the sun that is cooler than the surrounding areas and that has a strong magnetic field
solar flare an explosive release of energy that comes from the sun and that is associated with magnetic disturbances on the sun’s surface
prominence a loop of relatively cool, incandescent gas that extends above the photosphere and above the sun’s edge as seen from Earth
terrestrial planet one of the highly dense planets nearest to the sun; Mercury, Venus, Mars, and Earth
astronomical unit the average distance between Earth and the sun; approximately 150 million kilometers; symbol: AU
gas giant a planet that has a deep, massive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune
planetary ring a disk of matter that encircles a planet and consists of numerous particles in orbit, ranging in size from dust grains up to objects tens of meters across
dwarf planet
Kuiper Belt
Kuiper Belt object
 

 



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