/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: bhindeshertara https://public.slidesharecdn.com/v2/images/profile-picture.png I am a massive, luminous sphere of plasma held together by my own gravity. I came from the gravitational collapse of a gaseous nebula, also called a giant molecular cloud that is heated by its collapse until its hydrogen content reaches the ignition point for thermonuclear fusion.