Prepare your scantron: Use a pencil, not a pen! Fill in your name and fill the bubbles under your name. LAST NAME FIRST, First name second Put your 4-digit code instead of “IDENTIFICATION NUMBER”. --- (The last 4 digits of your OleMiss ID.) Question # 1: answer A Question # 2: answer A Question # 3: answer D Setup: Note extra credit deadlines: Signup: Feb. 6 2. Image Proc. Lab turned in: Feb. 21 Please take a moment to mute your cell phone!

Review questions coming …

This question counts double! sec 10 9 11 13 14 8 12 6 2 1 3 4 15 5 7 16 26 17 27 28 30 29 24 25 23 19 18 20 21 22 Question 4 How much detail can be seen on a star in a telescope? A A large disk with swirls of hot gas. B A large disk with burning flames. C A large disk with cloud stripes. D A small disk with a few dark spots. E None – it is a dot only. Next question coming …

This question counts double! sec 10 9 11 13 14 8 12 6 2 1 3 4 15 5 7 16 26 17 27 28 30 29 24 25 23 19 18 20 21 22 Question 5 How many stars can you see in the sky (without a telescope) in full dark? A A hundred. B A few thousand. C A few millions. D A hundred billions. E Unknown: they have never been counted. Next question coming …

The rest of the review questions are deferred to after the exercises.

Exercises: recognize deep-sky objects You’ll need to answer: which of these five types of deep-sky objects we are looking at and how we know and what it is: open cluster globular cluster galaxy planetary nebula diffuse nebula: reflection nebula, HII region, dust cloud, or a combination

Exercise 1 What object? Supernova remnant Looks like result of explosion How do we know? What is it? A star blew up Globular cluster What object? Many stars in sphere shape How do we know? What is it? Cluster of > 100,000 stars inside the Galaxy What object? Diffuse nebula (HII zone) Glowing gas illuminated by blue stars How do we know? Hot interstellar hydrogen gas cloud surrounds young hot stars What is it?

Exercise 2 Planetary nebula What object? One star in the middle of colorful gas How do we know? What is it? Old star loosing its atmosphere to space What object? Open cluster Many scattered stars How do we know? Loose disintegrating cluster of ~ 1,000 young stars inside the Galaxy What is it? Galaxy What object? Lens-shaped star system with dark lane How do we know? Star system of 100 billion stars like the Milky Way Galaxy What is it?

Exercise 3 What object? Open cluster Many scattered stars How do we know? What is it? Loose disintegrating cluster of ~ 1,000 young stars inside the Galaxy Diffuse nebula: HII region + dust clouds What object? Glowing gas, dark dust clouds in front How do we know? What is it? Hot interstellar hydrogen with dust blocking some of the light. A star formation region. Open cluster with reflection nebula What object? Blue cloud around bright stars How do we know? What is it? Loose disintegrating cluster of ~ 1,000 young stars inside the Galaxy, light reflected on interstellar dust.

Exercise 4 What object? Supernova remnant How do we know? Looks like result of explosion Star blew up What is it? What object? Galaxy How do we know Lens-shaped star system with spiral arms Star system of 100 billion stars like the Milky Way Galaxy What is it?

Exercise 5 What object? Planetary nebula behind open cluster How do we know? Many scattered stars + One star in the middle of colorful gas Loose disintegrating cluster of ~ 1,000 young stars inside the Galaxy + Old star loosing its atmosphere to space (unrelated) What is it? Insert:

Questions coming …

Question 6 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 16 26 25 27 28 30 29 17 24 19 18 23 20 22 21 What is in the picture? A A star cluster B A galaxy C A supernova remnant D A planetary nebula E A diffuse nebula Next question coming …

Question 7 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 16 26 25 27 28 30 29 17 24 19 18 23 20 22 21 What is in the picture? A An open cluster B A globular cluster C A galaxy D A planetary nebula E A diffuse nebula Next question coming …

Question 8 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 16 26 25 27 28 30 29 17 24 19 18 23 20 22 21 What is in the picture? A A star cluster B A galaxy C A supernova remnant D A planetary nebula E A diffuse nebula Next question coming …

Question 9 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 16 26 25 27 28 30 29 17 24 19 18 23 20 22 21 What is in the picture? A An open cluster B A galaxy C A globular cluster D A planetary nebula E A diffuse nebula Next question coming …

Question 10 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 16 26 25 27 28 30 29 17 24 19 18 23 20 22 21 What is in the picture? A An open cluster B A globular cluster C A galaxy D A planetary nebula E A diffuse nebula Next question coming …

Question 11 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 16 26 25 27 28 30 29 17 24 19 18 23 20 22 21 What is in the picture? A An open cluster B A globular cluster C A galaxy D A planetary nebula E A diffuse nebula Next question coming …

Question 12 sec 10 11 9 13 14 8 12 6 2 1 3 4 15 5 7 17 26 25 27 28 30 29 16 24 19 18 23 20 22 21 What is in the picture? A An open cluster B A globular cluster C A galaxy D A planetary nebula E A diffuse nebula