3. Vermillion Cliffs National Monument, Arizona. The Vermillion Cliffs National Monument in Northern Arizona is a remote and unspoiled dark-sky treasure. It’s the best place to see the Milky Way in Arizona, being at higher altitudes between 3,000-7,000 ft, far away from sources of light pollution, and surrounded by some of the most spectacular geological formations in the world. The Milky Way has a number of satellite galaxies, but the biggest one is the Large Magellanic Cloud. It is about 163,000 light-years away and around 1/100th the size of the Milky Way. Unlike our spiral galaxy, this one lacks a clean spiral shape. Some scientists think that is because the Milky Way and other galaxies are pulling and warping it. The team plotted the locations of 1,339 Cepheids on a 3D map, building out the most accurate representation of how the Milky Way is shaped. We know the Milky Way is a spiral galaxy -- a thin disk The observed speed of the Sun orbiting around the center of the Milky way is about 220 km/sec. The distance to the center is about 8.1 kiloparsec, which is 2.5E+17 kilometers. The time it takes to travel around a circle is the circumference divided by the speed, With an all-sky view of the Milky Way, the SUV-sized instrument uses a collection of mirrors, diffraction gratings, and CCD sensors to measure the distance to more than 1 billion Milky Way stars 3APdyGS.

milky way revolution time