U SING C ONSTELLATIONS. What are constellations? How were constellations used throughout history? What do modern astronomers use constellations for? Is.

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Presentation transcript:

U SING C ONSTELLATIONS

What are constellations? How were constellations used throughout history? What do modern astronomers use constellations for? Is there even a need?

F IND THE B IG D IPPER

E ASY !

F IND THE BIG DIPPER NOW ?

S TILL EASY ?

C AN YOU SPOT P OLARIS ?

I S THIS IT ? ??

P OLARIS IS NOT A BRIGHT STAR... NOPE!

W HY B IG D IPPER ? It is fairly easy to recognize It is seen year round in the northern hemisphere – just look to the north! Astronomers and navigators have been using it to guide the night skies for a long time It also helps us locate Polaris

W HAT SO SPECIAL ABOUT P OLARIS ? Our Pole Star It is directly above our North Pole All stars seem to “go around” Polaris

V IEW OF THE S TARS

L ET ’ S F IND P OLARIS ON YOUR MAP !

S TART WITH U RSA M AJOR

F IND THE B IG D IPPER

T HE B IG D IPPER IS PART OF U RSA M AJOR

F IND THE “ LIP ” OF THE B IG D IPPER LIP!

I T POINTS YOU TO P OLARIS About 5 times the length of the lip

E ASY ! POLARIS!

P OLARIS IS THE BRIGHTEST STAR IN U RSA M INOR Big Dipper Ursa Minor Polaris

F INDING S IRIUS Sirius is the BRIGHTEST star in the night sky!

F INDING THE A NDROMEDA G ALAXY

A STERISMS The Big Dipper is not an official constellation, but rather an asterism. It is a pattern of (usually the brightest) stars that is easily recognized in the night sky. It is NOT a smaller pattern within a constellation as our textbook suggests. Some other examples: Orion’s Belt The “W” Summer Triangle Winter Triangle Fish Hook (Scorpious)

F IND THE B IG D IPPER

O RION ’ S B ELT

S UMMER T RIANGLE

W INTER T RIANGLE

“W” OF C ASSIOPEIA

F ISH H OOK (S CORPIO )