The Milky Way galaxy is a barred spiral galaxy. All stars begin as part of a nebula, which is an interstellar cloud of dust, hydrogen gas, and plasma. It is the first stage of a star's cycle. Parallax is used to determine a star's distance, and the force that pulls together the matter in stars is gravity, the strength of which depends on the mass and distance between objects. Depending on its mass, a star may live from 10 million to 200 billion years.

1. The Milky Way galaxy is an example of a(n)
Barred SPIRAL
GALAXY
://science.howstuffworks.com/milky-wa

2. All stars begin as part of a large cloud
of gas and dust called a(n)
• NEBULA
____________________.
A nebula (from Latin: "mist"; pl. nebulae or nebulæ,
with ligature or nebulas) is an interstellar cloud of
dust, hydrogen gas and plasma. It is the first stage
of a star's cycle. Originally nebula was a general
name for any extended astronomical object,
including galaxies beyond the Milky Way (some
examples of the older usage survive; for example,
the Andromeda Galaxy was referred to as the
Andromeda Nebula before galaxies were discovered
by Edwin Hubble). Nebulae often form star-forming
regions, such as in the Eagle Nebula. This nebula is
depicted in one of NASA's most famous images, the
"Pillars of Creation". In these regions the formations
of gas, dust and other materials 'clump' together to
form larger masses, which attract further matter,
and eventually will become big enough to form
stars. The remaining materials are then believed to
form planets, and other solar system objects.

3. Parallax is used to determine a star’s
• DISTANCE
http://physics.syr.edu/courses/CCD_NEW/seti/tutorial/measure/part5.html

4. The force that pulls together the
matter in stars is…
http://science.howstuffworks.com/environmental/earth/geophysics/question232.htm

5. The strength of the force of gravity
depends on…..
• Mass and distance

6. The brightness
of a star as seen
from Earth is its
• APPARENT
_________
brightness.

7. •
Depending on its mass, a star may live from about
Dependinga.1 million to 10 million years. live from
on its mass, a star may
b.10 million to 200 billion years.
about
C. 5 million to 100 million years.
• b.10 million to 200 billion years.
Click here to learn more!!

8. Write 476,000,000,000,000 km in
scientific notation
• It’s EASY! Just make the BIG number smaller by making
it a number between 1-9 (with decimals if needed) and
write down your power of 10 (the number of times
you moved the decimal)
• 4.76 x 10¹⁴
• click here for scientific notation help

9. Astronomers typically measure
distances to stars in units called
______________
• Light years
Cool Fact
A light nanosecond -- the distance light can
travel in a billionth of a second -- is about 1
foot (about 30 cm). Radar uses this fact to
measure how far away something like an
airplane is. A radar antenna sends out a short
radio pulse and then waits for it to echo off an
airplane or other target. While it's waiting, it
counts the number of nanoseconds that pass.
Radio waves travel at the speed of light, so the
number of nanoseconds divided by 2 tells the
radar unit how far away the object is!
click here for light year info

10. What color are the coolest stars?
•RED

11. Gravity helps form stars, planets, and
solar systems by the gradual gathering
together of smaller pieces in a process
called

12. If you are in a car that stops suddenly,
your body keeps moving because it
hasINERTIA
• ____________________.

13. Stars with less mass will last longer or
shorter than stars with more mass.
• LESS MASS = LONG LIFE

14. Magnetic storms are a result of an
increase in solar wind caused by
eruptions on the sun
• Solar flares
called____________.
solar flare
solar flare video

15. Characteristics used to classify stars
include
• Temperature
• brightness

16. The most massive stars collapse to
• BLACK HOLES
form ____________ when they die.
black hole questions

17. Which two factors did Newton concluded
combine keeping Earth in orbit?
• MASS and inertia (VELOCITY)

18. A loose grouping of a few thousand
stars is called a(n)
• OPEN CLUSTER
An open cluster is a group of up to a few thousand stars that were formed from the
same giant molecular cloud and have roughly the same age. More than 1,100 open
clusters have been discovered within the Milky Way Galaxy, and many more are
thought to exist.[1] They are loosely bound to each other by mutual gravitational
attraction and become disrupted by close encounters with other clusters and clouds of
gas as they orbit the galactic center, resulting in a migration to the main body of the
galaxy as well as a loss of cluster members through internal close encounters. [2] Open
clusters generally survive for a few hundred million years. In contrast, the more
massive globular clusters of stars exert a stronger gravitational attraction on their
members, and can survive for many billions of years. Open clusters have been found
only in spiral and irregular galaxies, in which active star formation is occurring. [3]

19. A light-year is ______________
• The distance light travels on one year.
• 1 light year = 5.87849981 × 1012 miles
• Let’s move that decimal and find out how
many miles it REALLY is…
• 5,878,499,810,000 miles
<iframe width="640" height="360"
src="http://www.youtube.com/embed/Rj1sDWj
vgjM?feature=player_detailpage"
frameborder="0" allowfullscreen></iframe>

20. A spinning neutron star is called a(n)
• PULSAR
__________________.
A neutron star is about 20 km in diameter and
has the mass of about 1.4 times that of our Sun.
This means that a neutron star is so dense that
on Earth, one teaspoonful would weigh a billion
tons! Because of its small size and high density,
a neutron star possesses a surface gravitational
field about 2 x 1011 times that of Earth. Neutron
stars can also have magnetic fields a million
times stronger than the strongest magnetic
fields produced on Earth.
http://imagine.gsfc.nasa.gov/docs/science/know_l1/pulsars.html

21. Oh my gosh, I heard that astronomers
found life on another planet!!!!
Professor Von Drake said he found fleas on
Pluto!!!!
Really?! That’s
amazing!
STUDY!!!