Presentation is loading. Please wait.

Presentation is loading. Please wait.

1. How do scientists measure our distance from stars that are too far to use the parallax effect? 2. How is this this related to absolute magnitude? Times.

Similar presentations


Presentation on theme: "1. How do scientists measure our distance from stars that are too far to use the parallax effect? 2. How is this this related to absolute magnitude? Times."— Presentation transcript:

1

2 1. How do scientists measure our distance from stars that are too far to use the parallax effect? 2. How is this this related to absolute magnitude? Times Up!

3

4  Make a T-chart ◦ On one side list 3 things you think you know about stars. ◦ On the other side 3 list things you want to know about stars.

5  Not really empty  Stars, planets, etc.  Interstellar medium ◦ Dust and Gas ◦ Nebulas Orion Nebula a/ Large Magellanic Cloud 5a/

6  Nebulae are usually composed of 70% Hydrogen, 28% Helium, 2% heavier elements  A force compresses the particles, they begin to contract together

7  Gravity at work ◦ More mass means more gravity; more gravity results in more mass, etc.

8  As the Gravitational forces between the particles increase, they begin to spin more rapidly  Here is a demodemo  The shrinking, spinning region begins to flatten onto a disk called a PROTOSTAR

9  Increased pressure and temperature  Temperature continues to increase until it reaches about 10,000,000 O C when NUCLEAR FUSION begins and a star is born!

10 Little mass  lots of energy E = mc 2

11 Fermi National Lab  High temperatures  2 particles become 1  Releases a lot of energy

12  Energy heats up gas and causes outward expansion.  Gravity pushes in.  Forces balance out = Hydrostatic Equilibrium ◦ Stable adult stage star


Download ppt "1. How do scientists measure our distance from stars that are too far to use the parallax effect? 2. How is this this related to absolute magnitude? Times."

Similar presentations


Ads by Google