![](../_src/14118/icon-ikari-blue.png?v=1695714982952)
Lesson 1|Introductory
Let's begin your training! First is the difference between elliptical galaxies and spiral galaxies. (2 slides)
Practice
![Captain of GALAXY CRUISE](../_src/14124/you_did_it_redraw_20190719104522971.png?v=1695714982952)
![](../_src/14120/checkbox.png?v=1695714982952)
![](../_src/14122/checkbox.png?v=1695714982952)
Check your understanding with the following quiz.
【Introductory|Q1】 Classify the following galaxy.
![a galaxy](../_src/14126/training1_question1.crop.png?v=1695714982952)
Select the best answer.
Incorrect.
![Sad face of Captain](../_src/14130/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![Happy face of Captain](../_src/14128/150_correct.png?v=1695714982952)
The top (face-on) view of a spiral galaxy. You can see spiral arms.
Incorrect.
![Sad face of Captain](../_src/14132/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Introductory|Q2】Classify the following galaxy.
![a galaxy](../_src/14136/training1_question2.crop.png?v=1695714982952)
Select the best answer.
Correct!
![Happy face of Captain](../_src/14142/150_correct.png?v=1695714982952)
This galaxy does not have any features like spirals.
Incorrect.
![Sad face of Captain](../_src/14138/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14140/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Introductory|Q3】Classify the following galaxy.
![a galaxy](../_src/14146/training1_question3.crop.png?v=1695714982952)
Select the best answer.
Incorrect.
![Sad face of Captain](../_src/14148/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![Happy face of Captain](../_src/14152/150_correct.png?v=1695714982952)
The top (face-on) view of a spiral galaxy. You can see symmetrical spiral arms.
Incorrect.
![Sad face of Captain](../_src/14150/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Introductory|Q4】Classify the following galaxy.
![a galaxy](../_src/14156/training1_question4.crop.png?v=1695714982952)
Select the best answer.
Incorrect.
![Sad face of Captain](../_src/14158/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Correct!
![Happy face of Captain](../_src/14162/150_correct.png?v=1695714982952)
The side (edge-on) view of a spiral galaxy. You see a disk.
Incorrect.
![Sad face of Captain](../_src/14160/150_wrong.png?v=1695714982952)
Sorry. Please try again.
【Introductory|Q5】Classify the following galaxy.
![a galaxy](../_src/14166/training1_question5.crop.png?v=1695714982952)
Select the best answer.
Correct!
![Happy face of Captain](../_src/14172/150_correct.png?v=1695714982952)
This galaxy does not have any features like spirals.
Incorrect.
![Sad face of Captain](../_src/14168/150_wrong.png?v=1695714982952)
Sorry. Please try again.
Incorrect.
![Sad face of Captain](../_src/14170/150_wrong.png?v=1695714982952)
Sorry. Please try again.