Chapter Review Continued Stars and Galaxies Answers Chapter 3

Chapter 24 Stars and Galaxies - PowerPoint PPT Presentation

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Chapter 24 Stars and Galaxies

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Title: Chapter 24 Stars and Galaxies

1
Chapter 24Stars and Galaxies
2
Stars Constellations

• The constellations are totally imaginary things
  that poets, farmers, sailors, and astronomers
  have made up over the past 6,000 years
• The real purpose for the constellations is to
  help us tell which stars are which.
• On a really dark night, you can see about 1000 to
  1500 stars.
• The constellations help by breaking up the sky
  into more manageable bits.

3
Constellations

• They are used as mnemonics, or memory aids.
• For example, if you spot three bright stars in a
  row in the winter evening, you might realize,
  "Oh! That's part of Orion!"
• Now, the rest of the constellation falls into
  place and you can say "There's Betelgeuse in
  Orion's left shoulder and Rigel is his foot."

4
Constellations Orion ,The Hunter

5
Orion, The Hunter
6
Orion, The Hunter
7
Orion

• Orion is the master of the winter skies with his
  hunting dog Sirius trailing at his feet.

• The mythic tales of Orion go as far back as the
  Hittites, from 2000 B.C. to around 1200 B.C.

8
Orion

• There are many different stories from the Greeks.
  Basically, Orion was known as the "dweller of the
  mountain", and was famous for his skill as a
  hunter.

9
88 Constellations

• The constellations have changed over time.
• In the modern world, many of the constellations
  have been redefined so now every visible star in
  the sky is in exactly one constellation.

• In 1929, the International Astronomical Union
  (IAU) adopted official constellation boundaries
  that defined the 88 official constellations that
  exist today.
•  Constellations Web Site (The source for much of
  this information.)
• More Web Constellations

10
Constellations from Various Cultures

• Lakota People ( Native American )
• African
• Indian

11
Lakota People

• The Constellation of the Hand
• It represents the arm of a great Lakota chief.
• It symbolizes harmony between the gods and the
  people with the help of young people.
• The index finger is Rigel (star)
• and the thumb is
• the Orion Nebula.

12
Egypt North Africa

• Nut was the Egyptian sky goddess. She was
  depicted as a giant, naked woman who was
  supporting the sky with her back.
• Her body was blue and covered by stars.
• Each evening, the Sun entered the mouth of Nut
  and passing through her body was born each
  morning.

13
India

• The Seven Rishis
• According to the epic Mahabharata, composed in
  about 500 B.C., the stars of the Big Dipper were
  the seven sages called Rishis.
• These seven sages are said to be those who made
  the Sun rise and shine.

14

IAU Constellations to know

• Orion
• Leo
• Hercules
• Ursa Major
• Bootes (Bo O Teez)
• Draco
• Cassiopeia
• Canis Major

15
Leo

16
Hercules

17
Ursa Major
18
Ursa Major

19
Bootes

20
Bootes The Herdsman

21
A Roman Villa
22
Bootes

23
Draco

24
Draco The Dragon

• The origin of the constellation, Draco, and of
  most dragon lore as well, was probably the dragon
  Tiamat, the sea serpent who existed even before
  the sea and sky had been divided from each other,
  the dragon of chaos.  (Chaldeans)

25
Cassiopeia

26
Cassiopeia

• The Queen.
• Cepheus was King of Æthiopia (not present day
  Ethiopia), and the beautiful Cassiopeia was his
  Queen.  Soon after their marriage, Cassiopeia had
  a daughter, Andromeda.

27
Canis Major

28
Canis Major

• The brightest star is Sirius, also known as the
  Dog Star. ( Found in the neck (alfa))
• One of Orions Hunting Dogs.

29
November Star Map
30
November 18 Sky Map 730 PM
31
Greek Letters Web

• Alpha A
• Beta B
• Gamma G
• Delta D
• Epsilon E
• Zeta Z

32
Greek Letters in Science

• 1. Star Charts
• 2. Hurricanes
• 3. Physics equations Delta means Change
• 4. Lamda means Wavelength
• 5. Mu means micro

33
Constellations in Art

• Alexander Calder Mobiles, The ConstellationsA
  Philadelphian

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