A Stars Life
By Tristin Trybulski
- A cloud of gas (hydrogen) and Helium dust Carbon and silicon.
- he gravity pulls atoms together.In order to achieve life as a star, the protostar is made.
- Is a balance between gravity pulling atoms to the center and gas pressure pushing heat and light away from the center.
- Gravity pulling atoms to the center and gas pressure pushing light and heat away from the center
- Gas pressure the pressure exerted by gas.Gravity is the force attracting a body towards the center of the earth
- Gravity pushes inward Gas pressure pushes outward
The Birth of a Star
- After equilibrium is established, a certain nuclear process begins. Nuclear Fusion
- What is this process? It begins by fusing hydrogen in the core into Helium
- Define this process. fusion is when two smaller particles fuse together to make one
- What causes this process to begin? When the hydrogen is gone it starts fuse helium into carbon
- Give an equation for the process that occurs specifically in stars. Identify starting materials and products H1 +h1= he2
Main Sequence (star)
- What is this phase called? star
- What elements make up a star during this phase? Hydrogen and Helium gas
- What happens during this phase? All the energy is pooled together in the core by the nuclear fusion.
- What determines how long (or whether) a star will be in this phase? when the star burns up all its hydrogen it enters the next stage
- What happens at the end of this phase, in terms of nuclear processes? It enters the next stage which means it is not in the main sequence any more
- What is this phase called? Red giant
- What elements make up a star during this phase? Helium and Hydrogen
- What happens during this phase? The atmosphere of the giant grows while the core shrinks. As the giant grows in takes in the other planes in radius
- What nuclear processes occur during this phase? Planetary nebula phase
- What happens to the properties of a star during this phase (luminosity, temperature, volume) Temperatures and pressures increase. the volume also increases
The Role of Star’s Light
- Each element has several prominent, and many lesser, emission lines in a characteristic pattern. Sodium, for example, has two prominent yellow lines (the so-called D lines) at 589.0 and 589.6
- How does a star’s light become red-shifted or blue-shifted? when the star moves away from us it becomes blue shifted and when it comes towards us it becomes red shifted