SWBAT: 1. Use the hubble tuning fork to classify galaxies. WOD: Initial Activity: Read the about...
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Transcript of SWBAT: 1. Use the hubble tuning fork to classify galaxies. WOD: Initial Activity: Read the about...
Unit 2- Lesson #5- Using the Hubble Tuning Fork to Classify
Galaxies
SWBAT: 1. Use the hubble tuning fork to
classify galaxies.
WOD:
Initial Activity: Read the about seeing “The Milky Way from Earth” and describe how it is possible to take a picture or see the Milky Way from Earth. Cite details from the article to support your answer.
Mini Lesson: What is the Hubble tuning fork and how is it used to classify galaxies?
Activity: Classifying galaxies lab .
Summary: Why is the “tuning fork “ a good way of classifying the galaxies? Is there a better way?
Classifying GalaxiesUsing the Hubble Tuning Fork
Ellipticals- Sphereoidal, no disk• E0- roundest • E3- roundness decreases• E5- Starts to get more flat (egg
shape)• E7- flattest
Spirals-• S0- Looks elliptical but has a disc
shape• Sa- big bulge, tightly wound arms• Sb- medium wound arms• Sc- small bulge, loosely wound
arms Barred Spirals- have a distinct
line or bar that stretches out from the center, bulge in the center, and arms that spin out.
Classifying GalaxiesUsing the Hubble Tuning Fork
How to Classify:
Observe the picture of the galaxy and compare it to the two pictures provided for each type of galaxy in the EHCS.
Choose the one that best
matches and support how you knew using evidence from the picture and text.
Lets Try ItModel of how to observe a galaxy and
classify it using the Hubble tuning fork.
Now you tryCompare pictures A and B to the fork and decide their classification. Justify your response using details from the
picture, fork, and your notes.
A
B