Story of a Star - In the Womb of a Nebula
Star Formation - Protostar (In the womb of a Nebula)
All the stars in the universe have a life span; they take birth, shine for a certain time and then die. Nebulae (huge and massive cloud of gases such as hydrogen and dust particle in outer space) are the birth place of stars. Stars take birth from molecular clouds of Hydrogen gas (H2) and dust in a nebula. These molecular clouds can be as massive as 1,000,000 Suns and as wide as 100 to 150 light years in diameters.
These clouds are very cold (about 15 K) and once they are cold enough that the thermal energy pushing the particles in them apart becomes weaker as compared to the gravitational force pulling these particles together. Due to the higher gravitation force, these gaseous particles start to pull towards the centre (where the gravity is highest). This is called the collapsing of these gaseous clouds. As a result these clouds got denser and denser due to the more and more particles coming into smaller space, due to the gravity. These dense dark clouds are very early stage of a star, we name it as a Protostar as shown below:
Now as these gaseous particles coming closer and closer into very dense space, the collision frequency among them start to increase, as a result the thermal pressure (heat energy created from collisions) start to increase to. Remember that Gravity is behind the collapsing of the cloud and now a defending force against gravitational force is emerging, called thermal energy pushing the mass outward.
Story Continues.......................
so beautiful ..
Really Fascinating, now waiting for the next part already. Good stuff @mathworksheets!
Thanks for your kind remarks my friend @cryptodog :))
So beautiful, the cosmos will always amaze me!
Thanks for your kind words @jerrev :))
Sometime I looked at the Sky and Thought where are we and how small are we. Even I could't imaging such a big thing going around our planet and we know noting. Amazingly described. Great post will be anxious for next part.
Thanks for the discussions @angelshare. Yes, I think myself nothing. There is vast vast bodies out there, I don't know why we are just fighting for a little (almost nothing) space (called country borders) here???
You will find that who knows or at least has some knowledge about it I think they will not fight for border, Because they knows they are nothing in terms of universe.
Right, I think the ignorance is big enemy of humanity!!
Nicely explained
Thanks for your kind words dear friend @nrajesh :)
Very good read! As Carl Sagan said, "We are all stardust"
Thanks for stopping by, my dear friend @old-guy-photos. Yes, stars give birth to planets and then planets to us!
Yes and more so I am thinking of the very elements that we are made of were produced by stars dying as is often shared by Lawrence Krauss.. Quite humbling if you think about it.
Yes, very humbling :))
It's hard to even fathom the size of a molecular cloud. In terms of universe, we are really just another dust particle. Thank you for sharing this!
Thanks for your remarks @thewineman, yes we are nothing compared to so vast Universe :))
Great post, my friend!
....upvoted and resteemed
Wow, Thanks a lot @acwood, you are so kind.