OBJECTIVE:  I will evaluate my colleague's *Fine Art* work during today's class.

WORD FOR TODAY:

 

• solar nebula
• fusion
• nucleosynthesis
• Strong Force
• main sequence
• Blue Giant Stars
• Red Dwarf Stars
• Yellow Stars
• White Dwarf Stars
• Black Dwarfs
• Brown Dwarfs
• Black Holes
• Neutron Stars
• Main Sequence

WORK O' THE DAY: 

Please check your Fine Arts poetry and make sure that the name of the object is not present in your work.

Also please check to make sure that NO NAMES are present too! (we do want this to be anonymous)

Now please work with your team to create an evaluation form for our Fine Arts project.

We'll take a few moments to share our evaluations so you can add/edit your group's form as needed.

Let's commence on our 'gallery walk' to review/evaluate those!

 

Hand in your final reports to me and I'll tally the results whilst everyone is working on next steps for today (below)

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Please review our Words O' The Day -- which of those are actually stars? Why? Please discuss with your team!

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Recall our diagram for life cycles of stars generally:

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Notice red dwarfs have a fairly boring and VERY predictable life cycle:

1. Solar nebular (birth, a few dozen million years)
2. Red Dwarf (main sequence: hydrogen fusion, 100's of billions of years)
3. White Dwarf (glowing, no fusion, more hundreds of billions of years)
4. Black Dwarf (a hunk of carbon, trillions of years or more)

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Recall that there are a few interesting objects there.... let's review those before we mush on:

1) Brown dwarfs are not stars, never were stars and never will be stars... why?

2) Red giant stars are not considered main sequence stars... how come?

3) WHOA.... can white dwarf stars go Super Nova? What's that all about?

I'm glad you asked:

A type 1A supernova is a very interesting event.

Take a moment and review how a 'standard' type of supernova occurs (you should be able to tell me a bit about the star first... let's do that). We'll come back to that in a moment.

So... it turns out that a very interesting even can happen in particularly binary star systems.

What's a binary star again?

ANyhow...

Imagine a white dwarf star and another star in orbit around each other.... recall that the white dwarf star is the core of a main sequence star (typically a type G yellow star) that has lost it's outer layers in its Red Giant phase.

The white dwarf has a substantial gravitational field that actually pulls material from its companion star.

In a very well known process (that we'll talk about next unit) when the white dwarf pulls off 1.4 masses from the companion star it GOES BOOM!.

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