Show:
Luminosity
Vocab
HR-Diagram
History
Misc.
100

The hottest and dimmest stars are called what?

White Dwarfs

100

Stars produce energy through

Nuclear Fusion

100
The diagonal band that runs from the upper left to the lower right of a HR diagram and is referred to this.
What is the main sequence?
100
Hertzsprung and Russel observed that most stars fell along this line in the diagram.
What is the main diagonal?
100

This star has the highest luminosity on the HR-Diagram.

What is Betelgeuse?

200

What does luminosity mean?

The ability to make its own light.

200

A main sequence star's mass consists of what concentrations of materials?

73% hydrogen, 25% helium and 2% others elements

200
This axis measures temperature on HR Diagrams.
What is the horizontal axis?
200

High luminosity Stars are typically classified as what kind?

SuperGiants

200

The solar winds create what on Earth?

Aurora Borealis and Aurora Austalis

300

The layer where light is produced...

Photoshere

300

Clouds of dust that swirl together. The gravitational pull makes it bigger and bigger creating a...... 

protostar

300

Sirus B has a temperature of about...

What is 10,000 Kelvin?

300

These two American astronomers named the HR-Diagram.

What is Hertzsprung and Russel?

300

This axis is sometimes label with the color index of a star

What is the temperature (vertical) axis?

400

This arch like structure perdtrudes from the surface of a star.

A solar prominence. 

400

After a star goes Supernova it can turn into two things.... what is it?

Black Holes or Neutron Stars

400
Super giants are found in this corner of the HR-Diagram.
What is the upper right corner?
400

Our Sun can be described as what values...

____ luminosity and _____ temperature

medium, medium

400
These stars branch off from the main sequence and move to the upper right corner.
What is giant or supergiant stars?
500

A patch of dark cooler material that appears for a time on the "surface". 

Sunspot

500

What has a lot of gravity because it has TONS of mass. Billions of our Sun's mass compressed into space. 

Black Holes

500

These colored stars are generally hotter

What is blue stars?

500
Hertzsprung and Russel plotted these two relationships against each other.
What is a stars Luminosity vs. Temperature.
500

Before nuclear fusion begins.. what is a star called?

A protostar.