Test you knowledge of the Galaxy 1 / 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 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 rotation period of the galactic bar. The time it takes for a star to form. 3 / 10 What will eventually happen to the Milky Way and Andromeda galaxies? They will merge into a black hole 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 4 / 10 How thick is the Milky Way's disk? 50 light-years 10,000 light-years About 1,000 light-years thick 5,000 light-years 5 / 10 What percentage of the Milky Way's mass is believed to be dark matter? About 50% About 25% About 85% About 10% 6 / 10 What makes Alpha Centauri special in the Milky Way? It is the closest star system to the Sun It contains a black hole It is the brightest star in the sky It is the oldest known star 7 / 10 What is the Crab Nebula? A supernova remnant from an explosion observed in 1054 AD A dark nebula absorbing nearby light A reflection nebula A planetary nebula formed by a red giant 8 / 10 What is the event horizon of a black hole? The boundary beyond which nothing can escape the black hole's gravity The point where stars are pulled in A magnetic field boundary The black hole's core 9 / 10 What are the Pillars of Creation within the Eagle Nebula? Columns of gas and dust where new stars are being formed Regions of intense gamma-ray bursts Remnants of a supernova explosion Areas of dark matter 10 / 10 What shape is the Milky Way Galaxy? Ring Elliptical Spiral Irregular Your score isThe average score is 0% 0% Restart quiz
