constellations

Information about constellations

Published on November 13, 2007

Author: Estelle

Source: authorstream.com

Content

Slide1:  Constellations Slide2:  A pattern or group of stars in the sky is called a constellation. People of ancient time saw the constellations as character or animals in the sky. They made up stories to explain how the object, animal, or character came into the night sky. Slide3:  Orion Orion is one of the brightest constellations and is a mythological character. According to Greek myths, Orion was a hunter who used to brag all the time. This bother the gods. When the gods were tired of him, the sent a scorpion to bite and kill him. The gods felt bad for doing having Orion killed, they they placed him in the sky. Slide4:  Stars as Tools for Navigation Earth rotates on its axis, this makes most constellations appear to rise in the east and set in the west during the night. Most constellations appear in many different positions in the sky as the Earth revolves around the sun. There is a group of stars that appear in the sky all night long and all year long. It seems that these stars do not rise and set, but circle the Earth’s north pole each night. These stars are called circumpolar. Slide5:  Stars as Tools for Navigation The North Star is called Polaris and located directly above the North Pole. This star appears in the same place every night all year long. In the Northern Hemisphere, if you find Polaris you will be able to tell which direction is north. The Southern Hemisphere does not have a star to help you find its pole. In stead it has what is known as a Southern Cross. The Southern Cross consists of 4 bright stars and some dimmer ones. All of these together point to the south pole. Slide6:  Stars As Calendars It seems that the constellations in the east rise a little earlier each evening. This means that the seasons are changing and we are seeing different constellations. An example is in the Northern Hemisphere, Orion is high in the sky during the winter and Scorpio can only be seen during the summer. People of ancient times used these seasonal changes in the stars as calendars. It is believed that the ancient people used the constellations to tell them when to plant and harvest crops. An example would be Leo and Virgo in the night sky would signify that the last frosts of the year have happened and it is safe to plant. This worked much like our paper calendars work for us today. Slide7:  The brightest constellation is Crux (the Southern Cross). The constellation with the greatest number of visible stars in it is Centaurus (the Centaur - with 101 stars). The largest constellation is Hydra (The Water Snake) which extends over 3.158% of the sky. Slide8:  1. What is a constellation? 2. Why is Polaris called the North Star? 3. How did ancient people use the seasonal appearance of certain constellations? 4. Name two constellations.

Related presentations


Other presentations created by Estelle

personality
19. 11. 2007
0 views

personality

budd hind rev
13. 12. 2007
0 views

budd hind rev

A Mother in Mannville
03. 10. 2007
0 views

A Mother in Mannville

ANGEL pervasive presentation
01. 10. 2007
0 views

ANGEL pervasive presentation

Liderazgo Estrategico
05. 11. 2007
0 views

Liderazgo Estrategico

NewGenLib
02. 10. 2007
0 views

NewGenLib

The Underground Railroad
05. 12. 2007
0 views

The Underground Railroad

Rajaram edited
10. 12. 2007
0 views

Rajaram edited

Chapter 06
05. 11. 2007
0 views

Chapter 06

viajestiempo
12. 11. 2007
0 views

viajestiempo

Celestial Navigation
14. 11. 2007
0 views

Celestial Navigation

Data Center Power and Cooling
15. 11. 2007
0 views

Data Center Power and Cooling

Telstra
26. 11. 2007
0 views

Telstra

DOPE WWW
06. 12. 2007
0 views

DOPE WWW

Presentation TerryHicks
29. 12. 2007
0 views

Presentation TerryHicks

Ecology 10
01. 01. 2008
0 views

Ecology 10

Biomass SouthCoast
04. 01. 2008
0 views

Biomass SouthCoast

IntlPepperCAW06 wyenandt
07. 01. 2008
0 views

IntlPepperCAW06 wyenandt

Rhodes
28. 12. 2007
0 views

Rhodes

FMF Sec of Res pics 06
05. 11. 2007
0 views

FMF Sec of Res pics 06

WilliamRiley
04. 01. 2008
0 views

WilliamRiley

ca sos hearing presentation
29. 10. 2007
0 views

ca sos hearing presentation

EPCglobal update
15. 11. 2007
0 views

EPCglobal update

Auteur Theory and Robert Altman
19. 02. 2008
0 views

Auteur Theory and Robert Altman

Evaluating Diversified Companies
24. 02. 2008
0 views

Evaluating Diversified Companies

20040225 Peter Overview of h264
27. 02. 2008
0 views

20040225 Peter Overview of h264

russ rev
29. 02. 2008
0 views

russ rev

VBWG05 ASCOT
05. 03. 2008
0 views

VBWG05 ASCOT

Discover seminar2
11. 03. 2008
0 views

Discover seminar2

LT1001N Lecture 3 2006 7
14. 03. 2008
0 views

LT1001N Lecture 3 2006 7

China Outbound Tourism free
27. 03. 2008
0 views

China Outbound Tourism free

050623 Kaj je CIVITAS
01. 11. 2007
0 views

050623 Kaj je CIVITAS

Gene Edwards
30. 03. 2008
0 views

Gene Edwards

CUHistory
13. 04. 2008
0 views

CUHistory

assembly CU final 2 Oct
05. 11. 2007
0 views

assembly CU final 2 Oct

Cooking With Cranberries
05. 11. 2007
0 views

Cooking With Cranberries

6th US History SOL Review
24. 12. 2007
0 views

6th US History SOL Review

CS455 Introduction
28. 11. 2007
0 views

CS455 Introduction

Thorstensen
27. 12. 2007
0 views

Thorstensen

cdr
07. 11. 2007
0 views

cdr

Freak the Mighty
30. 12. 2007
0 views

Freak the Mighty

03 using objects
05. 11. 2007
0 views

03 using objects

AI Lecture72006
16. 11. 2007
0 views

AI Lecture72006

GSA 2006 Heart Disease
01. 12. 2007
0 views

GSA 2006 Heart Disease