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Life Cycle of Stars 2.0 - Luchs

Jia Luchs

Created on October 15, 2025

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Transcript

(Ionized+ gas = Plasma)

GOOD AFTERNOON!

ANNOUNCEMENTS

TODAY WE WILL

Today is…

  • Good New?
  • Warm-Up
  • Life Cycle of a Star Notes

Wednesday October 15th

DO THIS FIRST:

DID YOU KNOW…?

What is a star? A star is a ___________________.

©MrsReaderPants 2023

Distance to Stars - Light Years

Because stars are so far away, astronomers must measure their distance in a very large unit called a Light Year.

  • A light year is the distance light travels in one year .
  • The abbreviation for a light year is ly
  • 1 ly = 9.5 X 1012 km or 9.5 trillion km or 5.8 trillion miles.
  • Proxima Centauri, the next closest star is 4.3 light years from the Sun. (about 25 trillion miles away!) light speed simulator

Absolute brightness is also called Luminosity

GOOD AFTERNOON!

ANNOUNCEMENTS

TODAY WE WILL

Today is…

  • Good New?
  • Warm-Up
  • Finish Notes

February the 27th

DO THIS FIRST:

DID YOU KNOW…?

What is an HR Diagram?

©MrsReaderPants 2023

Warm Up: Thursday 2/27

What does this diagram represent?

  • What do each axis represent?

GOOD AFTERNOON!

ANNOUNCEMENTS

TODAY WE WILL

Today is…

  • Warm-Up
  • Finish Life Cycle of a Star Notes
  • Start Star Spectroscopy Lab
  • Good News?

Monday, October the 14th

Warm-Up Question:

On next slide →

DID YOU KNOW…?

Warm Up: Monday 10/14

What does this diagram represent?

  • What do each axis represent?

Finish Notes