constellations
DESCRIPTION
Constellations. Objectives for this unit:. a.Locate and identify stars that are grouped in patterns in the night sky. b.Identify ways people have historically grouped stars in the night sky. c.Recognize that stars in a constellation are not all the same distance from Earth. . - PowerPoint PPT PresentationTRANSCRIPT
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Constellations
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What is a constellation?
An imaginary picture in the sky, made using stars, that represents
a person, animal, or object.Click here for video.
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Why were constellations created?
Calendars – Helped farmers keep track of seasons.
Religion – Constellations represented important religious
figures or events.
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Navigation - Know where you are as you travel.
Important Groups of Constellations
The twelve (thirteen, really!) constellations of the Zodiac.
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Zodiac – “Circle of animals.”
The Sun, Moon, and planets appear to move through the
Zodiac.
Click here for Zodiac video.
Click here for Earth and Zodiac video.
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Constellations of the ZodiacAries (Ram), Taurus (Bull), Gemini
(Twins), Cancer (Crab), Leo (Lion), Virgo (The maiden), Libra
(Scales), Scorpius (Scorpion), Sagittarius (Archer), Capricornus
(Water Goat), Aquarius (Water Bearer), Pisces (Fish), & Lucky 13
Ophiuchus (Serpent Bearer).
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Circumpolar Constellations
Constellations that rotate around the North Star and are visible all
year.Click here for video.
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Constellations that rotate around the North Star and are visible all
year.Circumpolar Constellations – Big Dipper (Ursa Major), Little
Dipper (Ursa Minor), Cassiopeia, Cepheus, and Draco (Dragon).
Circumpolar Constellations
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When you look at a constellation, all the stars appear to be the same distance from Earth.
Look at Orion...
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Source: NASA StarChild
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Orion constellation (as seen from Polaris).
3-D Tour of the constellations.
The true shape of Orion.
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Why do we see different constellations during the
evening?Earth rotates on its axis.Rotation - When a planet
or moon turns all the way around or spins on
its axis one time.
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Why do we see different constellations through the
year?The Earth revolves around the Sun.Revolution - The circling of one
object around another object in space. The Earth revolves
around the Sun.
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The constellations of Fall.
The constellations of Winter.The constellations of Spring.
The constellations of Summer.
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Constellations used for navigation.The Big Dipper helps find
direction.Runaway slaves used the Big Dipper (Drinking Gourd).
Follow the Drinking Gourd.
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The Presentation Ends Here.