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