Test you knowledge of the Galaxy 1 / 10 What will eventually happen to the Milky Way and Andromeda galaxies? Andromeda will pass by the Milky Way without interaction They will collide in about 4-5 billion years They will expand away from each other They will merge into a black hole 2 / 10 What percentage of the Milky Way's mass is believed to be dark matter? About 25% About 50% About 85% About 10% 3 / 10 What makes Alpha Centauri special in the Milky Way? It is the brightest star in the sky It is the closest star system to the Sun It contains a black hole It is the oldest known star 4 / 10 What is a “galactic year”? The time it takes for a star to form. The time it takes for the solar system to orbit the center of the Milky Way, about 230 million years. The rotation period of the galactic bar. The length of a year in the galactic core. 5 / 10 What shape is the Milky Way Galaxy? Spiral Ring Irregular Elliptical 6 / 10 What is the Crab Nebula? A dark nebula absorbing nearby light A supernova remnant from an explosion observed in 1054 AD A planetary nebula formed by a red giant A reflection nebula 7 / 10 How thick is the Milky Way's disk? 50 light-years About 1,000 light-years thick 5,000 light-years 10,000 light-years 8 / 10 What are the Pillars of Creation within the Eagle Nebula? Columns of gas and dust where new stars are being formed Areas of dark matter Regions of intense gamma-ray bursts Remnants of a supernova explosion 9 / 10 What is the event horizon of a black hole? A magnetic field boundary The black hole's core The point where stars are pulled in The boundary beyond which nothing can escape the black hole's gravity 10 / 10 What is the diameter of the Milky Way Galaxy? 500,000 light-years 200,000 light-years About 100,000 light-years 50,000 light-years Your score isThe average score is 100% 0% Restart quiz
