Black Holes and Galaxies Crossword Puzzle

QUESTIONS LIST:

• black hole: an object in space in which the gravity is strong enough from preventing even light from escaping
• supermassive: the type of black hole in the center of most galaxies and can be millions of times the mass of the sun.
• halo: the outermost extent of a galaxy, containing a sparse distribution of stars and globular clusters.
• spiral: a flattened, rotating galaxy with pinwheel-like arms winding out from its central bulge.
• galaxy: a collection of millions/billions of stars, gas, and dust bound by gravity.
• bulge: the group of stars near the center of the galaxy, where stars are no longer bound to the disk.
• elliptical: the largest type of galaxy in the shape of ellipse and contains little interstellar material.
• irregular: . a galaxy without any clear symmetry or pattern; neither a spiral nor an elliptical galaxy.
• globular: a dense collection of typically older stars bound gravity.
• milky way: a large spiral galaxy that we call home.
• spiral arms: large bands of stars and gas that wrap around spiral galaxies.
• open: a loose collection of stars loosely bound by gravity.
• cannibalism: when a large galaxy merges with a smaller galaxy.
• local group: the galaxy cluster that we are a part of.
• escape velocity: the minimum speed needed for a free object to escape the gravitational influence of a massive body.
• singularity: all the matter that enters a black hole can be found at a single point thought to be the center of the black hole.
• event horizon: the surface around a black hole where the escape velocity is the speed of light.
• starburst: a description for a galaxy undergoing an exceptionally high rate of star formation, typically during a merger.