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The future of the Milky Way and the Andromeda Galaxy. Lukas Gabi, Rico Bürgler. Content. Discovery of Andromeda Galaxy Measurement Simulation After the collision: What happens to our solar system?. Can be seen without telescope Apparent dimensions 3.167° × 1°
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The future of the Milky Way and the Andromeda Galaxy Lukas Gabi, Rico Bürgler
Content Discovery of Andromeda Galaxy Measurement Simulation After the collision: What happens to our solar system?
Can be seen without telescope Apparent dimensions 3.167° × 1° Only the core is visible by eye Visibility and comparison
Described by Abd al-Rahman al-Sufi 964 AD Labeled M31 by Charles Messier, discovery by Simon Marius Measurement of radial velocity and distance at the beginning of the 20th century indicated Andromeda not being a nebula in the milky way Discovery of Andromeda
Measurement • Radial velocity measured at Lowell Observatory in 1913 • Blue shift indicated approaching velocity of 300km/s • Relative velocity to Milky Way: ~110km/s • Distance determined by Edwin Hubble in 1925 settled the “Great Debate” between Harlow Shapley and Heber CurtisDistance: ~2.5 million ly
Measurement • Proper motion (sideways) much harder to measure • High resolution telescopes were used to determine movement relative to background stars • Proper motion measured with hubble telescope from pictures between 2002 and 2012: Andromeda's tangential velocity with respect to the Milky Way is much smaller
After the collision • Star formation from compression stardust • New Galaxy “Milkomeda” with a binary system in the center • Binary system will finally merge into a single center • Some stars may fall into one of the centers • Other stars can be catapulted out of the galaxy • Triangulum Galaxy will eventually collide with Milkomeda