Test you knowledge of the Galaxy 1 / 10 What is a “galactic year”? The time it takes for the solar system to orbit the center of the Milky Way, about 230 million years. The length of a year in the galactic core. The time it takes for a star to form. The rotation period of the galactic bar. 2 / 10 How thick is the Milky Way's disk? 10,000 light-years About 1,000 light-years thick 50 light-years 5,000 light-years 3 / 10 What is the diameter of the Milky Way Galaxy? 500,000 light-years 200,000 light-years 50,000 light-years About 100,000 light-years 4 / 10 What percentage of the Milky Way's mass is believed to be dark matter? About 25% About 85% About 10% About 50% 5 / 10 What will eventually happen to the Milky Way and Andromeda galaxies? They will collide in about 4-5 billion years Andromeda will pass by the Milky Way without interaction They will expand away from each other They will merge into a black hole 6 / 10 What are the Pillars of Creation within the Eagle Nebula? Areas of dark matter Remnants of a supernova explosion Regions of intense gamma-ray bursts Columns of gas and dust where new stars are being formed 7 / 10 What is the event horizon of a black hole? The boundary beyond which nothing can escape the black hole's gravity The black hole's core The point where stars are pulled in A magnetic field boundary 8 / 10 What shape is the Milky Way Galaxy? Elliptical Spiral Irregular Ring 9 / 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 10 / 10 What is the Crab Nebula? A dark nebula absorbing nearby light A reflection nebula A supernova remnant from an explosion observed in 1054 AD A planetary nebula formed by a red giant Your score isThe average score is 58% 0% Restart quiz
