Astronomy Vocabulary Matching

Introduction to Astronomy Vocabulary Matching Activity If you've taken Earth Science or have an interest in astronomy you probably know some of these terms already, but it's alright if you don't know them yet.Match the vocabulary terms with their definitions as well as you can. Once you find a matching pair, click on the boxes to connect them, or click on the circle and drag the line to its partner term's circle. Galaxy a large collection of stars, dust, and gas held together by gravity Astronomy the scientific study of the universe Rotation the spin of a body on its axis Revolution one complete trip of a body (such as a planet) along an orbit EM Spectrum all the wavelengths of electromagnetic radiation Aphelion Point in a planet’s orbit when it is farthest from the Sun Ellipse Oval shape of the orbits of objects going around the Sun Perihelion Point in a planet’s orbit when it is closest to the Sun Astronomical Unit Unit of measure that is the average distance between the Sun and Earth (1.4960*108 km) Night and Day Caused by Earth's rotation Year Caused by Earth's revolution Seasons Caused by the tilt of the Earth Constellation a group of stars organized in a recognizable pattern Big Bang The event that began the universe Astrology Pseudoscience that claims celestial objects impact human interactions Planet A celestial object which moves in an elliptical orbit around a star Star A luminous celestial object held together by its own gravity