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--- courses:phy100:10 [2023/04/02 10:43] – [1. The Galaxy and us] asad
+++ courses:phy100:10 [2023/05/20 12:29] (current) – asad
@@ Line 1: / Line 1: @@
-====== 10. The Milky Way ======
+====== 10. Universe from the Big Bang ======
-===== - The Galaxy and us =====
+===== - Big bang and beyond =====
-Our galaxy has a center with a supermassive black hole.
-{{https://upload.wikimedia.org/wikipedia/commons/thumb/1/12/Artist%27s_impression_of_the_Milky_Way_%28updated_-_annotated%29.jpg/1024px-Artist%27s_impression_of_the_Milky_Way_%28updated_-_annotated%29.jpg?nolink}}
+===== - The first three minutes =====
-We are inside the disc of this galaxy, so we cannot see it from outside. But we can see different parts of the disk during different months of a year.
+===== - Birth of atoms =====
-{{youtube>3VKl3-vtXaU?large}} \\
+===== - Dark ages and cosmic dawn =====
-In this video, you see an animation of how Milky Way looks like from Dhaka during different months. Historically, only this shadowy band has been called the Milky Way, in Bangla আকাশগঙ্গা or ছায়াপথ, but the whole galaxy is also called the Milky Way now. Sometimes 'Galaxy' with an uppercase 'G' also refers to our galaxy, the Milky Way.
+===== - Dark energy domination =====
-===== - Nebula =====
-===== - Galactic center =====
-===== - Spiral arms =====