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 rotation period of the galactic bar. The time it takes for a star to form. 2 / 10 What percentage of the Milky Way's mass is believed to be dark matter? About 85% About 25% About 10% About 50% 3 / 10 What are the Pillars of Creation within the Eagle Nebula? Remnants of a supernova explosion Regions of intense gamma-ray bursts Columns of gas and dust where new stars are being formed Areas of dark matter 4 / 10 What makes Alpha Centauri special in the Milky Way? It is the closest star system to the Sun It is the brightest star in the sky It contains a black hole It is the oldest known star 5 / 10 What is the event horizon of a black hole? The point where stars are pulled in A magnetic field boundary The boundary beyond which nothing can escape the black hole's gravity The black hole's core 6 / 10 What is the Crab Nebula? A reflection nebula A planetary nebula formed by a red giant A dark nebula absorbing nearby light A supernova remnant from an explosion observed in 1054 AD 7 / 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 8 / 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 They will collide in about 4-5 billion years Andromeda will pass by the Milky Way without interaction 9 / 10 What shape is the Milky Way Galaxy? Irregular Ring Elliptical Spiral 10 / 10 What is the diameter of the Milky Way Galaxy? 200,000 light-years 500,000 light-years About 100,000 light-years 50,000 light-years Your score isThe average score is 58% 0% Restart quiz
