Universe and Electromagnetic Spectrum Crossword Puzzle

QUESTIONS LIST: frequency : the rate or number of crests of a wave that move past a given point in a given unit of time, universe : all of time and space and its contents. includes, planets, moons, stars, galaxies, and asteroids, black hole : a celestial object that has a gravitational field so strong that not even light can escape it, created by a supernova, elliptical : a galaxy having an elliptical shape, three-dimensional with random orbits around its center, star : a sphere made up of extremely hot gases. our sun is a medium size, gamma rays : very short wavelength and very high energy, microwaves : wave with a wavelength shorter than a radio wave but shorter than an infrared wave. used in radars and communications, wavelength : the distance between successive crests of a wave, main sequence : a series of star types n a band from the upper left (hot bright stars) to the lower right (cool dim stars), hr diagram : a graph that plots stars organized by luminosity and their temperature, spiral : a galaxy with spiral shape that contains a central bulge thought to contain a black hole, nebula : a cloud of gas and dust in outlet space, ultraviolet : light has shorter wave lengths than visible light, infrared : a wave of light invisible to the human eye longer than an ultraviolet ray and shorter than a microwave , supernova : the explosion of a star, possibly caused by a gravitational collapse, which increases the star's luminosity, galaxy : a gravitational bound system of stars, separated from similar systems by vast region of empty space, x rays : an electromagnetic wave of high energy an very short wavelength. able to pass through many material, light years : a unit of length in astronomy equal to the distance that light travels in one year in a vacuum, luminosity : the total amount of luminous energy emitted by a star. related to star's brightness, light waves : a type of electromagnetic wave of a frequency about 10*4 and 10*12 hz, speed of light : the distance light can travel in a unit of time through a given substance.