Astronomy
How would you define
this term?
Astronomy
The study of
everything beyond
Earth!
What do we call the overall place
where we live?
The Universe
Universe
Definition:
All of space and what is found in it.
Order of the Universe

Parts from largest to smallest?
Order of the Universe?
(Place the following from largest to smallest?)









Planet
Sun’s Neighbors
Local Group/Cluster
Star
Natural Satellite
Solar System
Galaxy
Universe
Super Cluster
UNIVERSE
Universe
 All
of space and
what is found in
it.
 Full of 100 billion
galaxies with
100 billion stars
each.
Super Cluster
Super Cluster



A collection of
galaxies which
includes the Local
Group (A Cluster).
Largest gravitational
bound system so far.
Ours=Virgo Super
Cluster
Cluster
Cluster

Ours :
- Local Group –
The Milky Way Galaxy and its
~50 closest neighbors.

A small group of galaxies
which are held together by
gravity and orbit each other.

“Local” means the galaxies
are within a region 3 million
light years across.
Galaxy
Galaxy
A
vast collection
of stars, gas,
and dust held
together by
gravity.
 Ours =
Milky Way
Sun’s Neighbors
Sun’s Neighbors
 The
sun and its
20 closest
neighboring
stars.
 Our closest stars
are: Alpha Centauri,
Proxima Centauri
( 4 LY Away )
Solar System
Solar System
*
A group of planets and
other celestial bodies that
orbit a star.
Ours:
The sun and its
collection of 8
planets.
Star

A hot, glowing globe of
gas that emits energy.

It radiates a huge
amount of energy in
the forms of light and
heat.

Ours = The Sun
Planet
Planet


An object that revolves
(orbits) around a star.
Ours = The Earth
Natural Satellite
Natural Satellite
 An
object that
revolves around
a planet
 Ours =
The Moon
What is the order?
(Largest to Smallest)









U___________
S___________ C__________
C ___________
G___________
S___________ N___________
S___________ S___________
S___________
P___________
N___________ S___________
Order of the Universe
(Proper order from largest to smallest.)









Universe
Super Cluster
Local Group/Cluster
Galaxy
Sun’s Neighbors
Solar System
Star
Planet
Natural Satellite
You now know the
parts and order of
the universe!
What an astronomical
task you have
accomplished!!!
