Chapter 2: Patterns in the Sky – Motions of Earth

Chapter 2:Patterns in the Sky –

Motions of Earth

Looking around the sky:What are the

Constellations?

Every culture has their own constellations

So whose constellations do astronomers use?

88 Official ConstellationsAndromeda

Established by the IAU in 1922 with boundaries finalized in 1928

What you see at night depends on what time it is

If it’s clear, go out tonight sometime and note the locations of the bright stars. Do the same thing two or three hours later to see how things have

What you see at night depends on what month you

Looking south in July

Looking south in January

What you see at night depends on where you are

Cerro Tololo Chile

Why does the sky change during the course of a

night?

The Earth rotates about its’ polar axis so the stars make circles around the celestial pole.

Why does the sky change over the course of a year?

As we orbit the Sun, the direction opposite the Sun changes and we only see the stars that are on the

opposite side of Earth from the Sun

Why does the sky change with your location?

As you move away from the pole your horizon moves with you but the locations of the celestial

poles and celestial equator remains the same

The Earth moves in two ways that affect what we see

Orbital motion around the Sun causes seasonal changes in the constellations

Rotational motion around the polar axis causes changes over the course of the night

The Celestial Sphere Model

We know the universe doesn’t rotate around us but it can be useful to imagine that it does

The Celestial Sphere can be used to explain the daily

motions and the changes due to location

Chapter 2: Patterns in the Sky – Motions of Earth

Documents

Astronomy by eye: motions in the Sky

Motions in the Sky (Part II) - Florida State Universitytadams/oldcourses/fall02/ast1002/lectures/Lecture... · Motions in the Sky (Part II) Sept 4, 2002 1) ... I have added homework

Mi’kmaq Night Sky Stories; Patterns of Resources … · · 2012-08-26• Mi’kmaq Night Sky Stories ... stars were positioned in the night sky (see Table 1). Elder Murdena Marshall

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Patterns of Earth and Sky - learning.amplify.com

Motions in the Sky

Patterns in the Sky & Constellations - Otterbein Universityfaculty.otterbein.edu/.../IS2403_FS15_L2_SkyPatterns.pdf · 2017. 8. 30. · Confusing! Let’s go with Patterns in the

Motions in the Sky - University of Wisconsin–Stevens Point

Observations of the Sky. What patterns, motions, and events do we notice in the sky? What theories can we create to explain them? How can these

Chapter 2. Cycles and Seasons: Motions in the Sky...2019/03/30 · 2. Cycles and Seasons: Motions in the Sky 4 Note. The conﬁgurations of the Moon (or phases of the Moon) are due

Lec - Night Sky FA14...THE NIGHT SKY Every culture had description of the sky (Babylonians, Greeks, Chinese, etc.) - observed patterns of bright stars - imagined figures of their mythology

Ch. 27.3 Star Groups. Constellations Patterns of stars in the sky, in which the stars are not necessarily close together. Patterns of stars in the sky,

Discovering The Universe for Yourself Patterns in the Sky The Constellation Orion

Sky Motions Diurnal Motion Annual Motion. DIURNAL MOTION o Daily East / West motion of the sky Due to the Earth’s rotation (15°/hour) [360°/24 hours

Why Do We See Patterns in the Sky and What Else is Out

F2020 Motions Night Sky v1

Patterns in the Night Sky. The same lights are seen in the same positions in the sky night after night The whole sky does seem to drift slightly westward

Patterns in the Sky: Constellation