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Introduction. Welcome. This is Phys 1040 and Astro 1040. Survey of Astronomy. Astro1010-lee.com. Please pick up one each of the papers on the table up front. [email protected] Introduction. Survey of Astronomy. Astro1010-lee.com. [email protected] Introduction. My e-mail.

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Survey of astronomy

Introduction

Welcome

This is Phys 1040 and Astro 1040

Survey of Astronomy

Astro1010-lee.com

Please pick up one each of the papers on the table up front.

[email protected]


Survey of astronomy

Introduction

Survey of Astronomy

Astro1010-lee.com

[email protected]


Survey of astronomy

Introduction

My e-mail

By far the best way to contact me is by e-mail.

[email protected]

Survey of Astronomy

Astro1010-lee.com

[email protected]


Survey of astronomy

Introduction

My Web Page

  • http://www.astro1010-lee.com/

    • Syllabus

    • Copies of my Slides

    • Lecture Notes

    • Links

Survey of Astronomy

Astro1010-lee.com

[email protected]


Survey of astronomy

Introduction

Text There is no Text, only the Slides and Lecture Notes

  • Tests

    • 5 unit tests

    • NO comprehensive final

    • Must be taken on the day scheduled (I can change the date but you can NOT)

    • Absolutely no late tests

    • May be taken early

    • I DROP YOUR LOWEST TEST SCORE

Survey of Astronomy

Astro1010-lee.com

[email protected]


Survey of astronomy

Introduction

Astrolab

(see link)

  • You need to attend one

    • Dr. Powell offers only a finite number

    • I recommend that you go to an early one

Survey of Astronomy

Astro1010-lee.com

[email protected]


Survey of astronomy

Introduction

Oral/Written Reports

  • Select from the list of Subjects that I will provide

  • These are designed to be part of the lectures

Survey of Astronomy

Astro1010-lee.com

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Exercise 1

Exercise 1


Survey of astronomy

Exercise 1

The purpose of this exercise is for the student to determine the circumference of the Earth using a variation of the Erotosthenes method

Survey of Astronomy

Astro1010-lee.com

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Survey of astronomy

Exercise 1

  • Requires

    • Protractor

    • Thread

    • Tape

    • Weight

  • Find the North Star

  • Measure the angle from the Horizon to the North Star

Survey of Astronomy

Astro1010-lee.com

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Survey of astronomy

Exercise 1

This is how your protractor should look after you get it ready

Survey of Astronomy

Astro1010-lee.com

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Survey of astronomy

Exercise 1

NCP

NCP

Survey of Astronomy

Astro1010-lee.com

θ1

θ2

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Survey of astronomy

Survey of Astronomy

Astro1010-lee.com

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Survey of astronomy

Chapter 1

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Survey of Astronomy

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Survey of astronomy

Chapter 1

astro1010-lee.com

Survey of Astronomy

BEGINNINGS

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Survey of astronomy

Chapter 1

Astronomy -- Study of the Universe

Universe -- everything that exists

  • Solar System

    • Planets

    • Moons

    • Asteroids

    • Comets

    • Other debris

    • Earth/Moon System

  • Galaxy

    • The Milky Way is our Galaxy

    • Stars

    • Open Star Clusters

    • Globular Star Clusters

    • Nebulae

    • Sun

    • Solar System

astro1010-lee.com

Survey of Astronomy

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Survey of astronomy

Chapter 1

Subtend

When an object just fills an angle it subtends that angle.

astro1010-lee.com

Survey of Astronomy

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Survey of astronomy

Chapter 1

Angular Units

Degree (of arc) = 1/360 Circle

Minute (of arc) = 1/60 of a Degree

Second (of arc) = 1/60 of a Minute

Hour (of arc) = 360/24 = 15 degrees

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Survey of Astronomy

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Survey of astronomy

Chapter 1

Distance Measure in Space

astro1010-lee.com

Survey of Astronomy

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Survey of astronomy

Chapter 1

OUR CODE

The Earth and the entire Universe obey a single set of Laws

astro1010-lee.com

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Survey of astronomy

Chapter 1

Scientific Theory and the Scientific Method

Scientific theories:

must be testable

must be continually tested

should be simple

should be elegant

Scientific theories can be proven wrong, but they can never be proven right with 100% certainty

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Survey of astronomy

Chapter 1

Scientific Theory and the Scientific Method

  • Observation leads to theory explaining it

  • Theory leads to predictions consistent with previous observations

  • Predictions of new phenomena are observed. If the observations agree with the prediction, more predictions can be made. If not, a new theory can be made.

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Survey of Astronomy

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Survey of astronomy

Chapter 1

Early Discoveries

  • Pre-historic

    • Sun

    • Moon

    • Stars

    • Constellations

    • Planets

    • Movement of the Sky

    • Path of the Sun

    • Movement of the Moon

  • Historic

    • Cyclic nature of the Universe ….. led to calendars

    • Explanation of the phases of the Moon

    • NCP

    • Celestial Equator

    • Explanation of the seasons

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Survey of astronomy

Chapter 1

Earth’s Orbital Motion

Daily cycle, noon to noon, is diurnal motion – solar day

Stars aren’t in quite the same place 24 hours later, though, due to Earth’s revolution around Sun; when they are, one sidereal day has passed

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Survey of astronomy

Chapter 1

From season to season the stars that we see change. This is because of the motion of the Earth in it orbit. The ancients thought it was because the Sun moved around the Earth

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Survey of astronomy

Chapter 1

The 12 constellations that the Sun appears to move through during the year are called the zodiac; the apparent path is the ecliptic

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Survey of Astronomy

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Survey of astronomy

Chapter 1

The Earth revolves around the Sun once each year causing the Sun to appear to move around the sky

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Survey of Astronomy

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Survey of astronomy

Chapter 1

  • Time from one vernal equinox to next is tropical year

  • Combination of day length and sunlight angle gives seasons

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Survey of Astronomy

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Survey of astronomy

Chapter 1

Precession: rotation of Earth’s axis itself; makes one complete circle in about 26,000 years

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Survey of astronomy

Chapter 1

The Terrestrial Coordinate System

Latitude is measured north and south from the equator

Longitude is measured east and west from the prime meridian

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Survey of astronomy

Chapter 1

Zenith is the point directly overhead

Meridian is the line from the north point through the zenith and on to the south point.

Horizon is the line on the sky made by the plane that is perpendicular to the vertical line from you to the zenith

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Survey of astronomy

Chapter 1

The Celestial Coordinate System

Reference

points and

planes on

Celestial

Sphere

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Survey of astronomy

Chapter 1

The Celestial Coordinate System

Right Ascension (RA) or Hour Angle is measured from the point on the sky where the Sun is at the Spring Equinox

Declination (δ) is measured north or south from the Celestial Equator

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Survey of astronomy

Chapter 1

Go to Chapter 2

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