Phases of the Moon Lab The Celestial Sphere Model One way the celestial sphere model is used explains positions in the sky as seen from YOUR position.

Slides:

Advertisements

Similar presentations

The Sun in the Sky And how it changes in the course of the year.

Advertisements

Geology/Physics 360 Astronomy Chapter 1: The Celestial Sphere.

PHYS 1025 – Introductory Astronomy Lecture 2, Either Semester

Apparent/Actual Motions Summary

Prologue Welcome to PH109 Exploring the Universe Dr. Michael L. Cobb Fall, 2003.

The Earth Rotates.

Constellations. Celestial Sphere Our Point of View.

An Earth Day Sidereal Day: 23 hr 56 min 4 sec Motion relative to background stars Mean Solar Day: 24 hours The average time between meridian crossings.

Motions of the Celestial Sphere. Constellations Sky looks like a dome with the star painted on the inside. 88 constellations such as Ursa Major, Orion,

The Celestial Sphere The 88 official constellations cover the celestial sphere. If you do not have a model of the celestial sphere to bring to class, you.

Patterns in the Sky (cont)

Section 3 Constellations  Sections of sky with recognizable star patterns  Used by ancient people for navigation  Also used to keep track of time.

Lecture 3 -- Astronomical Coordinate Systems Constellation of the Day…Aquila Look at constellation maps on course home page.

Copyright © by Holt, Rinehart and Winston. All rights reserved. Chapter 1 Section 3 Mapping the Stars.

AST 112 Motion of Objects in the Sky. The Celestial Sphere Imagine you’re where Earth is, but there’s no Earth. What do you see? Keep in mind: – Nearest.

Introduction to Astronomy.  Observations lead to theories and laws  Laws are concise statements that summaries a large number of observations.  Theories.

The Celestial Sphere Stars at different distances all appear to lie on the celestial sphere. The 88 official constellations cover the celestial sphere.

The Celestial Sphere Lab 2. Celestial sphere Geocentric model zenith - the point on the celestial sphere that is directly over our heads always 90˚ from.

Terrestrial Coordinates (useful for specifying locations on the surface of the Earth) Longitude - Longitude -- East/West Coordinate -- 0  at the Prime.

 There are 2 types: i. Az/Alt. -The horizontal coordinate system is a celestial coordinate system that uses the observer's local horizon as the fundamental.

Last time: 2.1. Patterns in The Sky: Stars and constellations, TODAY: celestial coordinates 2.2 Seasons,…Precession 2.2 (cont.) The Moon and Eclipses.

Where is it? On the Celestial Sphere. Longitude and Latitude On Earth: Longitude is how far you are, in degrees, East or West of the “Prime Meridian”

Coordinate Systems.

Celestial Sphere. Earthly Sphere Latitude measures the number of degrees north or south of the equator. –DeKalb at 41° 55’ N Longitude measures degrees.

Bellwork 9/2 Describe what you learned in your lab yesterday in 15 words or less.

A scientific model.  Why do we use the model of the celestial sphere when studying the night sky, even though it does not accurately represent three-dimensional.

1 Lines in the Sky In order to use the sky to measure time you need to measure the location of objects in the sky. We will look at two methods of measuring.

 Celestial Sphere: an imaginary sphere on which all the celestial objects would appear  Celestial object: any object in the sky that genuinely appears.

EARTH IN SPACE. A reminder about earth  The earth is almost a sphere  We locate points on the sphere with 3 coordinates – Longitude (180º W º.

Celestial Navigation Celestial Motion 1. General Organization Original “celestial sphere” model devised by the Greeks is still used –Greeks saw the Earth.

1.Stars move from east to west over the course of the night 2.Change slightly from one night to the next 3.However, their relative positions remain.

Chapter 2 Celestial Motions. Fig. 2.1 The Celestial Sphere To understand the idea of the celestial sphere first think of the earth in space. The stars.

AstroLab-2 Locating Stars in the Sky Merav Opher-Fall 2004.

Local and Sky Coordinates

MOTIONS OF SKY. Goals To identify the different parts of the celestial sphere model To understand how to express the location of objects in the sky To.

Our Location on the Earth North South EastWest North South East you are here West.

Chapter 4: Rising & Setting Stars © BRIEF

Observational Astronomy Mapping the Heavens Coordinate Systems We have two different ways to locate objects in the sky: Celestial equatorial system -Right.

What is apparent motion? Important to understand what we see and what is actually happening. Apparent motion is what we see from Earth Actual motion is.

Lecture 3 -- Astronomical Coordinate Systems Constellation of the Day…Aquila constellations.

The Celestial Sphere (The sphere should really be rotating, not Earth)

The Celestial Sphere Model describing the sky. (Glass bowl over the Earth) Pretend that the stars are attached to it Celestial Meridian: Line North to.

How do we locate objects in the sky? Angular separation: the angle between objects as seen from Earth (Degrees are separated into minutes (60 minutes of.

The Night Sky…last time, The Horizon System

Constellation – Sky Familiarization

1.5. Describing the Position of Objects in Space

November 8,2010 Celestial Motions.

Stargazing Terminology

Local and Sky Coordinates

Celestial Motions Chapter 2.

Motions of Earth, Moon and Sun

The Apparent Motions of Celestial Objects

12/29/2018 The Sky.

The Sky (Celestial Sphere)

On the Celestial Sphere

Aim: The Sun’s path each Season

What Is Astronomy? Write this on a new sheet of looseleaf

ASTRO UNIT 1 REVIEW.

And The Celestial Sphere

And The Celestial Sphere

And The Celestial Sphere

Celestial Motions Chapter 2.

On the Celestial Sphere

And The Celestial Sphere

Celestial Sphere Practice Quiz

And The Celestial Sphere

And The Celestial Sphere

Reading the Celestial sphere

And The Celestial Sphere

Presentation transcript:

Phases of the Moon Lab

The Celestial Sphere Model One way the celestial sphere model is used explains positions in the sky as seen from YOUR position on the earth.

The Celestial Sphere Model The sky is placed over you as a dome. The zenith is the point directly above you. The horizon is the rim.

The Celestial Sphere Model The distance above the horizon is called the altitude. The distance measured around the horizon is called the azimuth.

The Celestial Sphere Model A second way the celestial sphere model is used explains positions in the sky as seen from the WHOLE earth.

The Celestial Sphere Model Declination is the angular distance above the celestial equator. Right ascension is the distance around the equator starting at the vernal equinox.

Some Information on Stars

Appear to rise in the east and set in the west

Some Information on Stars Appear to rise in the east and set in the west Trace circular paths (except for Polaris)

Some Information on Stars Appear to rise in the east and set in the west Trace circular paths (except for Polaris) Move 15 0 per hour

Some Information on the Sun’s Path through the Sky

The path through the celestial sphere is called the ecliptic

Some Information on the Sun’s Path through the Sky The sun’s angle in the sky changes over the course of the year as does the points at which the sun rises and sets