Presentation is loading. Please wait.

Presentation is loading. Please wait.

Prepare your scantron:

PublishDortha Ferguson Modified over 6 years ago

Similar presentations

Presentation on theme: "Prepare your scantron:"— Presentation transcript:

1 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: Sept > send Image Proc. Lab turned in: Sept. 17 Reading assignment: Chapter 2, pp. 25 – 52 Please take a moment to mute your cell phone!

2 Constellations and designations of stars
Constellation = random collection of stars (figure) Stars’ names: Greek letter + constellation name Orionis (= Betelgeuse)  Orionis ( No special name)  Canis Maioris (= Sirius)

3 More star names Find: Leporis Geminorum Tauri A few distances:
Canis Maioris - 9 ly  Canis Maioris ly  Canis Maioris - 1,800 ly Canis Maioris ly 95% of the 6,000 naked-eye stars are at 50 to 500 ly: in the solar neighborhood. Inside Taurus!

4 Questions coming …

5 sec 8 9 10 12 11 7 6 1 2 3 4 13 30 35 40 45 14 25 16 15 18 17 19 20 5 Question 4 Which constellation is closer to us, and how do we know? A The Big Dipper is closer than Orion because the Big Dipper looks larger in the sky. B Orion is closer than the Big Dipper because Orion’s stars look brighter in the sky. C All constellations are at the same distance. D This question is nonsense because constellations are not real objects. E This question is nonsense because the distance to constellations changes as Earth revolves around the Sun. Next question coming …

6 sec 10 9 11 12 15 14 13 8 7 1 2 3 5 4 6 16 26 17 27 28 30 29 24 25 23 19 18 20 21 22 Question 5 What is  Canis Maioris? A The name of a bright star. B The name of a planet. C The name of a constellation. D A galaxy. E The name of a moon revolving around the planet  Canis Maioris. Next question coming …

7 sec 10 9 11 12 15 14 13 8 7 1 2 3 5 4 6 16 26 17 27 28 30 29 24 25 23 19 18 20 21 22 Question 6 The Pleiades (the “Seven Sisters”) is … A A constellation. B A star. C Not a constellation, but it is a star cluster inside the constellation of Taurus. D A constellation, which is the same thing as a star cluster. E A collection of seven random stars, unrelated to each other. Next question coming …

8 sec 8 9 10 12 11 7 6 1 2 3 4 13 30 35 40 45 14 25 16 15 18 17 19 20 5 Question 7 Most of the stars visible in the sky by the naked eye are … A outside the Galaxy. B inside the Galaxy, but not necessarily in the vicinity of the Sun. C inside the Galaxy, and mostly in the vicinity D 50% inside the Galaxy, 50% outside. E nowhere close to the Galaxy, which is much farther away from us than the individual stars in the sky are.

9 Understand brightness of stars: the magnitude scale
(Hipparchos ~ 170 BC) An m = 10mg, star, need an amateur telescope to see it The Andromeda Galaxy m = 3mg in total An m = 17mg, star, need a professional telescope to see it Magnitudes mean brightness: • The larger the number, the fainter the object • One magnitude difference means a lot dimmer (2.5 times) A fifth magnitude star: m = 5mg,, just visible to the naked eye A third magnitude star: m = 3mg A second magnitude star: m = 2mg __ I A first magnitude star: m = 1mg m = 2.5 × lg I Vega

10 Example: stars in the Big Dipper
4.0 mg 1.9 mg 2.2 mg 3.3 mg 5.6 mg

11 Questions coming …

12 sec 10 9 11 12 15 14 13 8 7 1 2 3 5 4 6 16 26 17 27 28 30 29 24 25 23 19 18 20 21 22 Question 8 The magnitude of a star tells us … A How far the star us from us. B How bright the star appears in the sky. C How bright the star is in reality. D How large the star appears in the sky. E How large the star is in reality. Next question coming …

13 sec 10 9 11 12 15 14 13 8 7 1 2 3 5 4 6 16 26 17 27 28 30 29 24 25 23 19 18 20 21 22 Question 9 Which one is brighter, a 1mg star or a 5mg star, and how much? A The magnitude of a star does not refer to brightness at all, it refers to size. B The 1mg star is much brighter. C The 1mg star is a little brighter. D The 1mg star is much fainter. E The 1mg star is a little fainter. Next question coming …

14 sec 10 9 11 13 14 8 12 7 2 1 3 4 6 5 15 17 26 25 27 28 30 29 16 24 19 18 23 20 22 21 Question 10 Do you need a telescope to see Pluto whose brightness is a 15mg? A No, it can be seen by the naked eye. B Yes, but even binoculars will suffice. C Yes, a small amateur telescope is needed. D A fairly large amateur telescope or a small professional telescope is needed. E Pluto is only observable in the largest professional telescopes in the world.

15 Exercises on magnitudes 1
This is how Orion looks to a naked-eye observer in complete darkness. Exercises on magnitudes 1  Orionis: 0.5 mg Orionis is one of the brightest stars in the sky. How bright do you think it is? How bright do you think Orionis is?  Orionis : 2.0 mg  Orionis : 4.3 mg How bright do you think Orionis is?

16 Exercises on magnitudes 2
Capella is 0 mg. How bright do you think the following are? Exercises on magnitudes 2 2 mg Pleiades 1 mg International Space Station Aldebaran 1 mg - 4 mg Venus - 2 mg Jupiter

Download ppt "Prepare your scantron:"

Similar presentations

Prepare your scantron: 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.

Prepare your scantron: 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.
Prepare your scantron: 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.

Prepare your scantron: 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.
Astronomical distances The SI unit for length, the meter, is a very small unit to measure astronomical distances. There units usually used is astronomy:

Astronomical distances The SI unit for length, the meter, is a very small unit to measure astronomical distances. There units usually used is astronomy:
Prepare your scantron: 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.

Prepare your scantron: 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.
Prepare your scantron: 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.

Prepare your scantron: 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.
Chapter 2: The Sky. Common Units we will use Common Conversions.

Chapter 2: The Sky. Common Units we will use Common Conversions.
Earth in Space and Time: SC:5.E.5.1

Earth in Space and Time: SC:5.E.5.1
Stars and galaxies. Constellations  Ancient Greeks, Romans and other cultures saw patterns of stars in the sky called constellations  They imagined.

Stars and galaxies. Constellations  Ancient Greeks, Romans and other cultures saw patterns of stars in the sky called constellations  They imagined.
Magnitude, and Intensity Physics 113 Goderya Chapter(s): 2 Learning Outcome:

Magnitude, and Intensity Physics 113 Goderya Chapter(s): 2 Learning Outcome:
Prepare your scantron: 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.

Prepare your scantron: 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.
Prepare your scantron: 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.

Prepare your scantron: 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.
THE SKY CHAPTER 2 (Part 1). Objectives To be able to interpret and apply the term “brightness” to stars. To be able to describe how the sky moves with.

THE SKY CHAPTER 2 (Part 1). Objectives To be able to interpret and apply the term “brightness” to stars. To be able to describe how the sky moves with.
Usually, what we know is how bright the star looks to us here on Earth… We call this its Apparent Magnitude “What you see is what you get…”

Usually, what we know is how bright the star looks to us here on Earth… We call this its Apparent Magnitude “What you see is what you get…”
Prepare your scantron: 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.

Prepare your scantron: 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.
Prepare your scantron: 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.

Prepare your scantron: 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.
Prepare your scantron: 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.

Prepare your scantron: 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.
Prepare your scantron: 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.

Prepare your scantron: 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.
The previous chapter took you on a cosmic zoom through space and time. That quick preview only sets the stage for the drama to come. Now it is time to.

The previous chapter took you on a cosmic zoom through space and time. That quick preview only sets the stage for the drama to come. Now it is time to.
Observing Basics What is there to see in the night sky?

Observing Basics What is there to see in the night sky?
The Night Sky. Big Questions: What do we see when we look at the night sky with the naked eye? How are stars named? Why is the apparent magnitude of stars.

The Night Sky. Big Questions: What do we see when we look at the night sky with the naked eye? How are stars named? Why is the apparent magnitude of stars.

Similar presentations

Ads by Google