Our Galaxy and Other Galaxies by Brad Archer, Cole Christensen, and Justin Summers

1. Our Galaxy and Other Galaxies
Brad Archer
Cole Christensen
Justin Summers

2. It is shaped like a disk being 1,000
light years thick and 100,000 light
years in width
Our Galaxy is the Milky Way

3. The thin disk has a Central Bulge and a
Halo that surrounds the entire disk.

4. Stars in the Halo orbit at a random pattern,
sometimes even crossing through the disk
Stars within the disk orbit in
almost the same pattern time
after time

5. Our galaxy is made up of mostly stars
Although there is
no way to know
for sure how
many stars there
are in our galaxy
there has been
some estimates
of 100billion

6. Our Solar System has one Sun and
eight Planets

7. The sun is the
largest mass
in our solar
system
The sun is made
up of hydrogen
and helium gas

8. Mercury is
the closest
planet to
the sun
Mercury
is made
up of
mostly
iron
Mercury is 3
light
minutes
from Earth

9. Venus is the
2nd planet
away from
the sun
Venus’s
atmosphere
is mainly
made up of
96% carbon
dioxide
Venus is 6
light
minutes
away form
Earth

10. Earth is the
3rd planet
from the sun
Earths
surface is
made up of
71% water
It takes light
8 min and 19
sec to reach
the Earth

11. Mars is the
4th planet
from the sun
Mars’s
atmosphere
is mostly
comprised of
carbon
dioxide
Mars is 12.5
light minutes
away from
Earth

12. Jupiter is the
5th planet
from the sun
Jupiter’s
atmosphere
is made up of
mostly
hydrogen gas
and helium
gas
Jupiter is
43 light
minutes
from Earth

13. Saturn is
the 6th
planet from
the sun
Saturn is
made up
of 94%
hydrogen
Saturn is 79
light
minutes
from Earth

14. Uranus is
the 7th
planet
from the
sun
Uranus is
made up of
various ices
Uranus is 160
light minutes
from Earth

15. Neptune is
the 8th
planet from
the sun
Neptune's
atmosphere is
made from
about 80%
hydrogen and
19% helium
Neptune is
250 light
minutes away
from Earth

16. Galaxies are vast
collections of stars that
populate our universe

17. “The most recent example
of this fact is the Hubble
extreme Deep Field, a
collection of photographs
from the Hubble Space
Telescope revealing
thousands of galaxies in a
single composite picture.”
(The Background picture here)

19. • Slide 3 http://www.space.com/25959-how-many-stars-are-in-the-milky-way.html
• Slide 5 https://www.google.com/?gfe_rd=ssl&ei=wVgZV7XQIdDT-AXo9Y6YDw#q=what+is+mercury+the+planet+made+of
• Slide 5 https://www.google.com/?gfe_rd=ssl&ei=jlkZV_eaAoWP-gX6m6TwCQ#q=how+many+miles+is+a+light+year
• Slide 6 https://www.google.com/?gfe_rd=ssl&ei=wVgZV7XQIdDT-
AXo9Y6YDw#q=how+many+light+years+away+is+venus+from+earth
• Slide 6 http://coolcosmos.ipac.caltech.edu/ask/47-What-is-Venus-made-of-
• Slide 8https://www.google.com/?gfe_rd=ssl&ei=wVgZV7XQIdDT-
AXo9Y6YDw#q=how+many+light+years+away+is+mars+from+earth
• All the light minutes http://utahscience.oremjr.alpine.k12.ut.us/sciber06/6th/size_etc/html/speed.htm

20. • How stars move
http://exo.missouristate.edu/ast/113/Week15
a.pdf