Download Structure of the Universe

Bell Ringer (Day 1)
Describe
the Universe
(On White Board)
Bell Ringer (Day 2)
Describe
the Universe
(On White Board)
Structure of the Universe (Pg 32)
Essential Question:
*What makes up the Universe?
Part 1 - What is the Universe?
Universe - Space and all of the
matter (stuff) and energy that is in it.
What is the Universe?
*Includes galaxies, stars, solar systems,
planets, other objects (moons, comets,
asteroids, meteoroids), dust, gases
UNIVERSE
GALAXY
STAR
SOLAR SYSTEM
PLANET
*Galaxy – a massive system of stars,
gases, dust, and other matter held
together by a central gravitational force
*There are billions of galaxies in the
Universe
*Each galaxy contains billions of stars
A) Spiral Galaxy – Circular with spiral arms
*The Milky Way Galaxy is spiral
B) Elliptical Galaxy – oval-shaped
C) Irregular Galaxy – no regular shape (blotch)
Galaxy Cluster – a group of galaxies close
to each other (relatively speaking)
https://www.youtube.com/watch?v=RubnGwhcT6E
*Stars – large spherical (round) bodies
composed of gas and emits (gives off) light
The Sun
Sirius
Betelgeuse
Aldebaran
Regulus
*Solar System – a central star with planets
and other small objects orbiting it
*Planet – a spherical body that orbits a star
Other types of Mass:
Gases and Dust (Nebula)
Bell Ringer (Day 3)
Describe the
Milky Way Galaxy
(On the White Board)
Bell Ringer (Day 4)
Space travel beyond our
Moon has been
impossible so far.
Explain why you believe
this is so.
https://www.youtube.com/watch?v=uuYoYl5kyVE
Part 2 - Measuring Distances in the
Universe
*Astronomical Unit (AU’s) – the distance
from Earth to the Sun
--used to measure distances in the
Solar System
*AU = 150 million kilometers (km) or
93 million miles
(93,000,000 miles)
*Light year – the distance light travels
through space in 1 year of time
--approximately 6 trillion miles per year
(6,000,000,000,000)
--670 million miles per hour
--386,000 miles per second
***Nothing travels faster than light***
-- 1 Light year = 63,200 AUs
*Light year
**Used to measure distances in the rest
of the Universe
*It would take 4.3 years to travel (at the
speed of light) to the nearest star (Alpha
Centauri) from Earth
**Over 5 million years traveling at jet
airliner speed (550 mph)
STAR
Sirius
Vega
Aldebaran
Betelgeuse
Rigel
DISTANCE
8.6 ly
25 ly
65 ly
430 ly
773 ly
https://www.youtube.com/watch?v=CiDkNvaOtB4
Conclusion
Quick Write:
Explain why it is currently
impossible for space travel
outside our Solar System
(Use light year units to support
your claim)