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Protostars

Protostars are Pre-main-sequence stars. They are powered by gravity and not fusion. These objects are what all stars do at their birth before planetary formation. Protostars are embryonic stars. They are stars before they are stars. This is part of my intro Astronomy class taught at Willam Paterson University and CUNY Hunter. Join this channel to get access to perks:    / @jasonkendallastronomer   0:00 Introduction 0:01 Star Clusters 2:28 Steps to Stardom... 3:01 Cloud Fragmentation 3:48 The Formation of Stars Like the Sun 11:02 Building a Protostar 12:30 A Quick Beginning... 13:28 Protostars have Disks 14:07 Clearing out the Disk 15:18 From Protostar to Star 16:48 Kelvin-Helmholz Timescale 21:39 High-Mass Protostars 22:23 Low-Mass Protostars 23:38 The Zero-Age Main Sequence 24:44 Minimum Mass is about 0.08 Solar Masses 25:54 Brown Dwarf Gliese 229B 28:19 What can we see? 29:46 Life Cycles of Stars 32:51 Baby Stars in the Trifid Nebula 38:14 A massive disk around a baby star.... 39:14 Protostellar Jets 48:09 Protostars in the Orion Nebula 53:35 Fragmentation of protostars from a giant molecular cloud Supplement the videos with "OpenStax Astronomy" https://openstax.org/books/astronomy/... 20: Between the Stars: Gas and Dust in Space https://openstax.org/books/astronomy/... 21: The Birth of Stars and the Discovery of Planets Outside the Solar System https://en.wikipedia.org/wiki/Protostar Protostars https://en.wikipedia.org/wiki/T_Tauri... T Tauri star https://en.wikipedia.org/wiki/Pre-mai... Pre-main-sequence star https://en.wikipedia.org/wiki/Herbig_... Herbig Ae/Be star https://en.wikipedia.org/wiki/Herbig-... Herbig-Haro object https://en.wikipedia.org/wiki/Kelvin-... Kelvin-Helmholtz mechanism https://en.wikipedia.org/wiki/Gravita... Gravitational collapse https://en.wikipedia.org/wiki/Nebular... Nebular hypothesis https://en.wikipedia.org/wiki/Jeans_i... Jeans instability