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OOuurr UUnniivveerrssee
OOuurr ggaallaaxxyy iiss kknnoowwnn aass tthhee 
MMiillkkyy WWaayy..
TThheerree aarree tthhoouussaannddss ooff ootthheerr 
ggaallaaxxiieess iinn oouurr uunniivveerrssee..
OOtthheerr ggaallaaxxiieess iinn oouurr 
uunniivveerrssee hhaavvee mmaannyy 
ssiimmiillaarriittiieess ttoo oouurr 
MMiillkkyy WWaayy..
OOtthheerr ggaallaaxxiieess ooff 
oouurr uunniivveerrssee 
aappppeeaarr ttoo hhaavvee 
tthhee ssaammee 
eelleemmeennttss ((lliikkee 
tthhoossee ffoouunndd oonn 
oouurr PPeerriiooddiicc 
TTaabbllee ooff tthhee 
eelleemmeennttss))..
TThheeyy aallssoo aappppeeaarr ttoo hhaavvee 
tthhee ssaammee kkiinnddss ooff ffoorrcceess,, 
ssuucchh aass ggrraavviittyy..
AAnndd tthheeyy aappppeeaarr ttoo hhaavvee 
ssiimmiillaarr eenneerrggyy ssoouurrcceess –– 
ssuucchh aass eenneerrggyy ffrroomm ssttaarrss 
((lliikkee oouurr ssuunn)),, aanndd iinntteerrnnaall 
hheeaatt eenneerrggyy wwiitthhiinn llaarrggee 
bbooddiieess ((lliikkee oouurr ppllaanneettss))..
MMoosstt ooff wwhhaatt wwee kknnooww aabboouutt oouurr 
vvaasstt uunniivveerrssee ssoo ffaarr hhaass bbeeeenn 
ddiissccoovveerreedd uussiinngg ttoooollss aanndd 
tteecchhnnoollooggyy ssuucchh aass tthhee HHuubbbbllee 
SSppaaccee TTeelleessccooppee..
HHooww vvaasstt iiss vvaasstt?? 
TThhee ffaarrtthheesstt tthhiinngg eevveerr 
oobbsseerrvveedd bbyy hhuummaannss iiss aa 
qquuaassaarr 1122 bbiilllliioonn lliigghhtt yyeeaarrss 
aawwaayy..
SSiinnccee aa lliigghhtt yyeeaarr iiss tthhee 
ddiissttaannccee lliigghhtt ttrraavveellss iinn aa 
ggiivveenn yyeeaarr,, 1122 bbiilllliioonn lliigghhtt 
yyeeaarrss iiss hhooww ffaarr lliigghhtt 
wwoouulldd ttrraavveell iinn 1122 bbiilllliioonn 
yyeeaarrss..
HHooww bbiigg iiss aa bbiilllliioonn??
IItt wwoouulldd ttaakkee aabboouutt 3322 
yyeeaarrss ttoo ccoouunntt ttoo oonnee 
bbiilllliioonn iiff yyoouu ccoouunntt oonnee 
nnuummbbeerr ppeerr sseeccoonndd aanndd 
NNEEVVEERR ssttoopp oorr ppaauussee aatt aallll!!
LLiigghhtt ttrraavveellss 
330000,,000000 kkiilloommeetteerrss 
ppeerr sseeccoonndd!!
SSoo 1122 bbiilllliioonn lliigghhtt 
yyeeaarrss iiss aa vveerryy lloonngg 
wwaayy!!
SScciieennttiissttss eessttiimmaattee tthhaatt tthhee 
uunniivveerrssee iiss aapppprrooxxiimmaatteellyy 1155 
bbiilllliioonn lliigghhtt yyeeaarrss aaccrroossss.. TThhaatt 
mmeeaannss iitt wwoouulldd ttaakkee 1155 bbiilllliioonn 
yyeeaarrss ttrraavveelliinngg aatt tthhee ssppeeeedd ooff 
lliigghhtt ((ssoommeetthhiinngg wwee ccaann’’tt ddoo 
yyeett)) ttoo rreeaacchh tthhee eeddggeess ooff tthhee 
uunniivveerrssee!
There aarree mmaannyy mmoorree tthhiinnggss ttoo 
ddiissccoovveerr aabboouutt oouurr uunniivveerrssee,, bbuutt 
bbeeccaauussee iitt iiss ssoo vvaasstt,, iitt wwiillll ttaakkee aa 
lloonngg ttiimmee ffoorr sscciieennttiissttss ttoo ddeevveelloopp 
mmoorree wwaayyss ttoo eexxpplloorree iitt..
The name of the galaxy in which you 
find our solar system is the 
A: Black Hole 
B: Double Spiral 
C: Andromeda 
D: Milky Way
How many galaxies are in our 
universe? 
A: thousands 
B: hundreds 
C: ten 
D: just ours
The same elements found in our 
Periodic Table of the elements can be 
found in stars and celestial bodies 
throughout the universe. 
A: True 
B: False
The force of gravity is only found 
within our solar system. 
A: True 
B: False
Celestial bodies throughout the 
universe get their energy from our 
sun. 
A: True 
B: False
Most of the information we have 
discovered about the distant 
universe has come from 
A: the Hubble Telescope. 
B: the Apollo program. 
C: space travel. 
D: the International Space Station 
(ISS).
The farthest object ever observed by 
humans is a quasar that is 
A: 12 billion miles away. 
B: 4 billion kilometers away. 
C: 12 billion light years away. 
D: 10 million kilometers away.
A light year is 
A: the distance between the Earth 
and the sun. 
B: the time it takes to travel to the 
moon. 
C: the distance light travels in one 
Earth year. 
D: 365 days.
It would take 32 years to travel to 
the end of the universe in a space 
ship. 
A: True 
B: False
You are looking into the night sky and notice 
a particular star. You research the star and 
find out it is 5,000 light years away. Which of 
the following is true? 
A: the star is 5,000 years old 
B: the light you see from that star today 
began its travel 5,000 years ago 
C: the star will explode and die within 10 
years from now 
D: none of the above

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Powerpoint 13 our universe

  • 2. OOuurr ggaallaaxxyy iiss kknnoowwnn aass tthhee MMiillkkyy WWaayy..
  • 3. TThheerree aarree tthhoouussaannddss ooff ootthheerr ggaallaaxxiieess iinn oouurr uunniivveerrssee..
  • 4. OOtthheerr ggaallaaxxiieess iinn oouurr uunniivveerrssee hhaavvee mmaannyy ssiimmiillaarriittiieess ttoo oouurr MMiillkkyy WWaayy..
  • 5. OOtthheerr ggaallaaxxiieess ooff oouurr uunniivveerrssee aappppeeaarr ttoo hhaavvee tthhee ssaammee eelleemmeennttss ((lliikkee tthhoossee ffoouunndd oonn oouurr PPeerriiooddiicc TTaabbllee ooff tthhee eelleemmeennttss))..
  • 6. TThheeyy aallssoo aappppeeaarr ttoo hhaavvee tthhee ssaammee kkiinnddss ooff ffoorrcceess,, ssuucchh aass ggrraavviittyy..
  • 7. AAnndd tthheeyy aappppeeaarr ttoo hhaavvee ssiimmiillaarr eenneerrggyy ssoouurrcceess –– ssuucchh aass eenneerrggyy ffrroomm ssttaarrss ((lliikkee oouurr ssuunn)),, aanndd iinntteerrnnaall hheeaatt eenneerrggyy wwiitthhiinn llaarrggee bbooddiieess ((lliikkee oouurr ppllaanneettss))..
  • 8. MMoosstt ooff wwhhaatt wwee kknnooww aabboouutt oouurr vvaasstt uunniivveerrssee ssoo ffaarr hhaass bbeeeenn ddiissccoovveerreedd uussiinngg ttoooollss aanndd tteecchhnnoollooggyy ssuucchh aass tthhee HHuubbbbllee SSppaaccee TTeelleessccooppee..
  • 9. HHooww vvaasstt iiss vvaasstt?? TThhee ffaarrtthheesstt tthhiinngg eevveerr oobbsseerrvveedd bbyy hhuummaannss iiss aa qquuaassaarr 1122 bbiilllliioonn lliigghhtt yyeeaarrss aawwaayy..
  • 10. SSiinnccee aa lliigghhtt yyeeaarr iiss tthhee ddiissttaannccee lliigghhtt ttrraavveellss iinn aa ggiivveenn yyeeaarr,, 1122 bbiilllliioonn lliigghhtt yyeeaarrss iiss hhooww ffaarr lliigghhtt wwoouulldd ttrraavveell iinn 1122 bbiilllliioonn yyeeaarrss..
  • 11. HHooww bbiigg iiss aa bbiilllliioonn??
  • 12. IItt wwoouulldd ttaakkee aabboouutt 3322 yyeeaarrss ttoo ccoouunntt ttoo oonnee bbiilllliioonn iiff yyoouu ccoouunntt oonnee nnuummbbeerr ppeerr sseeccoonndd aanndd NNEEVVEERR ssttoopp oorr ppaauussee aatt aallll!!
  • 13. LLiigghhtt ttrraavveellss 330000,,000000 kkiilloommeetteerrss ppeerr sseeccoonndd!!
  • 14. SSoo 1122 bbiilllliioonn lliigghhtt yyeeaarrss iiss aa vveerryy lloonngg wwaayy!!
  • 15. SScciieennttiissttss eessttiimmaattee tthhaatt tthhee uunniivveerrssee iiss aapppprrooxxiimmaatteellyy 1155 bbiilllliioonn lliigghhtt yyeeaarrss aaccrroossss.. TThhaatt mmeeaannss iitt wwoouulldd ttaakkee 1155 bbiilllliioonn yyeeaarrss ttrraavveelliinngg aatt tthhee ssppeeeedd ooff lliigghhtt ((ssoommeetthhiinngg wwee ccaann’’tt ddoo yyeett)) ttoo rreeaacchh tthhee eeddggeess ooff tthhee uunniivveerrssee!
  • 16. There aarree mmaannyy mmoorree tthhiinnggss ttoo ddiissccoovveerr aabboouutt oouurr uunniivveerrssee,, bbuutt bbeeccaauussee iitt iiss ssoo vvaasstt,, iitt wwiillll ttaakkee aa lloonngg ttiimmee ffoorr sscciieennttiissttss ttoo ddeevveelloopp mmoorree wwaayyss ttoo eexxpplloorree iitt..
  • 17. The name of the galaxy in which you find our solar system is the A: Black Hole B: Double Spiral C: Andromeda D: Milky Way
  • 18. How many galaxies are in our universe? A: thousands B: hundreds C: ten D: just ours
  • 19. The same elements found in our Periodic Table of the elements can be found in stars and celestial bodies throughout the universe. A: True B: False
  • 20. The force of gravity is only found within our solar system. A: True B: False
  • 21. Celestial bodies throughout the universe get their energy from our sun. A: True B: False
  • 22. Most of the information we have discovered about the distant universe has come from A: the Hubble Telescope. B: the Apollo program. C: space travel. D: the International Space Station (ISS).
  • 23. The farthest object ever observed by humans is a quasar that is A: 12 billion miles away. B: 4 billion kilometers away. C: 12 billion light years away. D: 10 million kilometers away.
  • 24. A light year is A: the distance between the Earth and the sun. B: the time it takes to travel to the moon. C: the distance light travels in one Earth year. D: 365 days.
  • 25. It would take 32 years to travel to the end of the universe in a space ship. A: True B: False
  • 26. You are looking into the night sky and notice a particular star. You research the star and find out it is 5,000 light years away. Which of the following is true? A: the star is 5,000 years old B: the light you see from that star today began its travel 5,000 years ago C: the star will explode and die within 10 years from now D: none of the above