Posted by: mrborden | September 9, 2011

Lifecycle of Stars

The Milky Way in 3D , Describe our location in our galaxy

Describe how big our sun is compared to the biggest star shown in this video, in a paragraph

Lifecycle of stars
1) How many stars are there in our galaxy?
2) What is the actual name for a stellar nursery?
3) What are the 3 lightest elements ?
4) What university is clifford Johnson a professor at?
5) Does the hydrogen gas start out hot or cold?
6) The heat rise to _______ million degrees
7) Hydrogen atoms fuse to form ____ atoms during nuclear __________
8) How does gravity act on a star? on Earth?
9) What do all main sequence stars have in common? How are they different?
10) what are the most common color of stars?
Describe the lifescyle of a sun like star in a paragraph

black hole questions
1) what is a black hole?
2) Where are the subaru observatory that detected the black hole?
3) What happened 13 billion years ago, what was a formed?
4) what telescope viewed thos event?
5) what is a quasar?
6) what is OJ287?
7) The Chandra X ray observatory photographed the largest black hole that was _______ solar masses
8) what is a acretion disc?
9) What local galaxy has formed a black hole?
10) what sits in the middle of the milky way galaxy approximately 28 million light years away?

ESS 2d Students know that stars differ in their life cycles and that visual, radio, and X-ray telescopes may be used to collect data that reveal those differences.
QFD: We forfeit three-fourths of ourselves in order to be like other people – Anon
?FD: What size of star is the sun?
Objective: Students will know and be able to
Understand: ESS 2d Students know that stars differ in their life cycles and that visual, radio, and X-ray telescopes may be used to collect data that reveal those differences.
Word of the Day : Protostar – earliest stage of a star

graph 3 stars
brightness temp
sun – 5.0 6800 f
alpha centauri 3.8 4000 f
sirius 6.5 18000 f

life of star (graph)
size life expectancy

sun Med 10 billion years
betelgeuse Supergiant 3 million years
aldeberan Giant 4.5 billion years
What is the relationship between size and life expectancy for a star?

QFD: Success is a journey not a destination. Arthur Ashe
?FD: What percentage of all stars are in the main sequence on the HR diagram?
Objective: Students will know and be able to understand:
ESS 2d Students know that stars differ in their life cycles and that visual, radio, and X-ray telescopes may be used to collect data that reveal those differences.
Word of the day: Accretion – the clumping of particles and gases to form spheres and discs

0 hypergiants
I supergiants Ia-0 (hypergiants or extremely luminous supergiants (later addition)), Example: Eta Carinae (spectrum-peculiar)
Ia (luminous supergiants), Example: Deneb (spectrum is A2Ia)
Iab (intermediate luminous supergiants) Example: Betelgeuse (spectrum is M2Iab)
Ib (less luminous supergiants)

II bright giants IIa, Example: β Scuti (HD 173764) (spectrum is G4 IIa)
IIab Example: HR 8752 (spectrum is G0Iab:)
IIb, Example: HR 6902 (spectrum is G9 IIb)

III normal giants IIIa, Example: ρ Persei (spectrum is M4 IIIa)
IIIab Example: δ Reticuli (spectrum is M2 IIIab)
IIIb, Example: Pollux (spectrum is K2 IIIb)

IV subgiants IVa, Example: ε Reticuli (spectrum is K1-2 IVa-III)
IVb, Example: HR 672 A (spectrum is G0.5 IVb)

V main sequence stars (dwarfs) Va, Example: AD Leonis (spectrum M4Vae)
Vb, Example: 85 Pegasi A (spectrum G5 Vb)
“Vz”, Example: LH10 : 3102 (spectrum O7 Vz), located in the Large Magellanic Cloud.[28]

VI subdwarfs. Subdwarfs are generally represented with a prescript of sd or esd (extreme subdwarf) in front of the spectra. sd, Example: SSSPM J1930-4311 (spectrum sdM7)
esd, Example: APMPM J0559-2903 (spectrum esdM7)

VII (uncommon) white dwarfs. White dwarfs are represented with a prescript wD or WD.

Friday Stations – 10 min Each, 2min switch, Objective: ESS 2D (220pts)Students know that stars differ in their life cycles and that visual, radio, and X-ray telescopes may be used to collect data that reveal those differences.

1) Mr. Ziehen’s door (20)- You will tape a sheet of white paper to his door and copy the sunspots that you observe using a binoculars turned backwards. TA’s will help you. Make a circle on your picture page and draw the sunspots that you observed. Answer the4se questions on the paper you completed your warm up on -What are sunspots? What temperatures of stars would you expect to find more sunspots? Less sunspots?
2) IPAD – Solar Mass / constellations and star clusters – You will explore 2 apps on IPAD Orbit HD and Go Sky watch . If you explore any other programs or apps you receive an F for this section and you will not be allowed to participate in future IPAD events. You will explore 3 stars and 1 constellation using the Go sky watch application. You will write down the 3 stars magnitude and distance away from Earth, and write the name of the constellation they belong to. (10) You will graph these 3 stars using the opposite side of your main sequence star plotting graph.(30) Place magnitude on the Y axis (vertical) and Distance from Earth on the X axis (horizontal). This weekend go outside at night and see if you can identify the stars you chose.
As Homework, Write a perfect paragraph discussing what stars you observed and use the terms absolute magnitude, and light years in your paragraph. (30) Were you able to see any red or blue stars? Where were they in the sky in relationship to the stars that you chose? Make a chart or draw a picture of where you saw red or blue stars. (20)
Part 2 – Orbit HD , open app and observe our solar system, Write down the mass of our sun. Increase the solar max and observe what happens? Write down the mass of your super giant star and you observation of what happened to the planets. Next push the button in the upper left corner that looks like back arrows which will reset the orbit to our present solar system. Decrease the mass of the star and observe what happens. Write down the mass of your white dwarf. Discuss, in a paragraph, the relationship between gravity and the mass of a star.(30) A TA will Help You
3) Finish Drawings and writing Station – you will only have 10 minutes to finish your drawings or star plotting diagram.
4) Mr. Borden station – (30pts) you will be asked 3 Questions and I will look at your notebooks(50). If you do not have a notebook assemble all of your papers and notes you have taken so far.
What are Quasars? Cole this is for You also!



  1. hey mr.borden cole here i was watching the biggest known blackhole and i was studying for the quiz i even took the quiz here at my house but i have a question they talked about it in the video but i still dont understand what a quasar is like i didnt quite understand what they explained it was so i was wondering if you could explain it to me thank you 🙂

    • A quasi-stellar radio source (“quasar”) is a very energetic and distant active galactic nucleus. Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies.

      While the nature of these objects was controversial until as recently as the early 1980s, there is now a scientific consensus that a quasar is a compact region in the center of a massive galaxy surrounding its central supermassive black hole. Its size is 10–10,000 times the Schwarzschild radius of the black hole. The quasar is powered by an accretion disc around the black hole
      excellent job cole! Study lifecycle of a star!

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