![](../_src/14248/icon-ikari-blue.png?v=1695714982952)
Lesson 3|Advanced
In this lesson you will learn more about the features of interacting galaxies such as rings and fans. (3 slides)
Practice
![Captain of GALAXY CRUISE](../_src/14254/you_did_it_redraw_20190719104522971.png?v=1695714982952)
![](../_src/14250/checkbox.png?v=1695714982952)
![](../_src/14252/checkbox.png?v=1695714982952)
Check your understanding with the following quiz.
【Advanced|Q1】Look at the image carefully and answer the following two questions.
![a galaxy](../_src/14256/training3_question1.crop.png?v=1695714982952)
1-1 Classify the following galaxy.
Are you sure?
![Sad face of Captain](../_src/14260/150_wrong.png?v=1695714982952)
Please try again.
Are you sure?
![Sad face of Captain](../_src/14258/150_wrong.png?v=1695714982952)
Please try again.
Right! This is not an obvious case.
![Happy face of Captain](../_src/14262/150_correct.png?v=1695714982952)
It is not clear whether this galaxy is elliptical or spiral.
1-2 What feature(s) do you see?
Correct!
![](../_src/14264/training3_question1.cropa.png?v=1695714982952)
![Happy face of Captain](../_src/14274/150_correct.png?v=1695714982952)
A vertical ring can be seen.
Incorrect.
![Sad face of Captain](../_src/14266/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14268/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14270/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14272/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Advanced|Q2】Look at the image carefully and answer the following two questions.
![a galaxy](../_src/14278/training3_question2.crop.png?v=1695714982952)
2-1 Classify the following galaxy.
Correct!
![Happy face of Captain](../_src/14284/150_correct.png?v=1695714982952)
This galaxy does not have any spiral galaxy characteristics (flat disk or spirals).
Incorrect.
![Sad face of Captain](../_src/14280/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14282/150_wrong.png?v=1695714982952)
Sorry. Please try again.
2-2 What feature(s) do you see?
Incorrect.
![Sad face of Captain](../_src/14288/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14290/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![](../_src/14286/training3_question2.cropa.png?v=1695714982952)
![Happy face of Captain](../_src/14296/150_correct.png?v=1695714982952)
The tail can be seen in the lower left.
Incorrect.
![Sad face of Captain](../_src/14292/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14294/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Advanced|Q3】Look at the image carefully and answer the following two questions.
![a galaxy](../_src/14300/training3_question3.crop.png?v=1695714982952)
3-1 Classify the following galaxy.
Incorrect.
![Sad face of Captain](../_src/14302/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![Happy face of Captain](../_src/14306/150_correct.png?v=1695714982952)
Incorrect.
![Sad face of Captain](../_src/14304/150_wrong.png?v=1695714982952)
Sorry. Please try again.
3-2 What feature(s) do you see?
Incorrect.
![Sad face of Captain](../_src/14308/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14310/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14312/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14314/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![Happy face of Captain](../_src/14316/150_correct.png?v=1695714982952)
The symmetrical spiral arms can be seen and there are no features suggesting interaction.
【Advanced|Q4】Look at the image carefully and answer the following two questions about the galaxy in the center.
![a galaxy](../_src/14320/14_s3q4.crop.png?v=1695714982952)
4-1 Classify the following galaxy.
Incorrect.
![Sad face of Captain](../_src/14324/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![Happy face of Captain](../_src/14326/150_correct.png?v=1695714982952)
Clockwise spiral arms can be seen.
Incorrect.
![Sad face of Captain](../_src/14322/150_wrong.png?v=1695714982952)
Sorry. Please try again.
4-2 What feature(s) do you see?
Incorrect.
![Sad face of Captain](../_src/14330/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14332/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14334/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![](../_src/14328/s3q4.crop_a.png?v=1695714982952)
![Happy face of Captain](../_src/14338/150_correct.png?v=1695714982952)
The part indicated by the arrow is elongated due to the gravity of the galaxy to the right.
Incorrect.
![Sad face of Captain](../_src/14336/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Advanced|Q5】Look at the image carefully and answer the following two questions.
![a galaxy](../_src/14342/16_s3q5.crop.png?v=1695714982952)
5-1 Classify the following galaxy.
Correct!
![Happy face of Captain](../_src/14348/150_correct.png?v=1695714982952)
Spiral arms cannot be seen.
Incorrect.
![Sad face of Captain](../_src/14346/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14344/150_wrong.png?v=1695714982952)
Sorry. Please try again.
5-2 What feature(s) do you see?
Incorrect.
![Sad face of Captain](../_src/14358/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![](../_src/14350/17_s3q5.crop_a.png?v=1695714982952)
![Happy face of Captain](../_src/14360/150_correct.png?v=1695714982952)
Multiple fans can be seen.
Incorrect.
![Sad face of Captain](../_src/14356/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14354/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14352/150_wrong.png?v=1695714982952)
Sorry. Please try again.
The final question
【Final】Look at the image carefully and answer the following two questions.
![a galaxy](../_src/14364/18_last.png?v=1695714982952)
Classify the following galaxy.
Are you sure?
![Sad face of Captain](../_src/14366/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Are you sure?
![Sad face of Captain](../_src/14368/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Right! This is not an obvious case.
![Happy face of Captain](../_src/14370/150_correct.png?v=1695714982952)
It is not clear whether this galaxy is elliptical or spiral.
What feature(s) do you see?
Incorrect.
![Sad face of Captain](../_src/14374/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14376/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![](../_src/14372/19_last.crop_a.png?v=1695714982952)
![Happy face of Captain](../_src/14382/150_correct.png?v=1695714982952)
Multiple tails can be seen. This interacting galaxy has two features: tails and one other. Try to find the other correct answer.
Like this galaxy, interacting galaxies sometimes have two or more features.
Correct!
![Happy face of Captain](../_src/14380/150_correct.png?v=1695714982952)
Distortion can be seen. This interacting galaxy has two features: distortion and one other. Try to find the other correct answer.
Like this galaxy, interacting galaxies sometimes have two or more features.
Incorrect.
![Sad face of Captain](../_src/14378/150_wrong.png?v=1695714982952)
Sorry. Please try again.
![](../_src/14384/scroll-w.gif?v=1695714982952)
Training completed!
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Introductory, Intermediate, and Advanced,
click the button below.
Thank you for your hard work! (But now the REAL work starts.)