Astronomy 1021 Lecture Notes - Lecture 19: Harlow Shapley, Orion Arm, Virgo Supercluster

• School: Western University
• Department: Astronomy
• Course: Astronomy 1021
• Professor: Robert Cockcroft

Document Summary

Material from dead stars is used to create new ones. All stars we see within our sky are extremely close to us. 33 stars within 12. 5 lightyears from the sun. Shown: 1500 of the most luminous stars within 250 light years. About one third of stars visible to the naked eye are within 250 light years. Atlas of the universe: 5 000 light years. Atlas of the universe: 50 000 light years. Atlas of the universe: . 5 million light years. Each dwarf contains 10s of millions of stars. Dwarfs are in orbit around mw taking billions of years to orbit once. Atlas of the universe: 5 million light years. Atlas of the universe: 100 million light years. Atlas of the universe: 1 billion light years. Notice the filaments of clusters, and the voids in between. Atlas of the universe: 13. 8 billion light years. Filaments and voids seem to form a sponge like structure.