OBJECTIVE:  I will be able to relate three "Big Freeze" timeline milestones of the very distant future after today's class.

OBJECTIVE: The team says Yay Nay Maybe we are a GO for tonight

WORDS FOR TODAY:

• Planck Time ("10^-43 sec after the Big Bang")
• Dark Matter ("Invisible matter")
• Dark Energy ("The force accelerating the Universe outwards")
• Red shift ("objects move apart")
• Blue shift ("objects move together")
• Big Crunch ("The Universe collapses")
• Big Freeze ("The Universe expands forever getting colder, larger, darker and emptier")
• Modified Big Freeze (""The Universe exists forever getting colder, larger, darker and emptier"
• Big Rip ("The Universe accelerates so fast it shreds itself out of existence")

WORK O' THE DAY: 

Let's review our (Revised) Big Bang timeline -- there are 6 items now instead of 7

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Here are a couple of new terms that will help before we watch this video:

Red Dwarf stars: We talked about them yesterday. Those are very small stars (roughly 5 - 10 times the size of the Earth) that can (and will!) live for trillions of years!!!

White Dwarf stars: Aren't stars at all. They are the core of stars like the sun. They don't 'mash' atoms anymore. They just sit there like coals in a barbeque-- slowing giving off heat for dozens or maybe even hundreds of billions of years!

Black Dwarf stars: A white dwarf star that has given off ALL of it's heat. Just a chunk of iron floating in space

Neutron stars: Wannabe black holes that that were born from exploded stars that just never got big and bad enough to become black holes.

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One of my student's last year shared THIS absolutely incredible video that helps visualize some of what that article discusses. It's a bit long but well worth the time. What we don't finish now we'll view tomorrow.