Download Galaxies

Warm-Up
March 28
Look at the diagram of the Sun, the Moon,
and Earth. Which phase of the Moon would
be seen by people on Earth?
New Moon
Earth
Moon
Sun
MYP Unit Question: What’s out there?
Area of Interaction: Human Ingenuity
Learner profile:
Risk Taker
Standard: Explore current scientific
views of the universe and how those
views evolved.
Learning Target:
Today I’m learning about galaxies and star
systems because they are part of our solar
system.
Opening: Galaxy Video
Work Session:
Pre-test
Notes: Galaxies and Star Systems
Closing: “Name that Galaxy”
A collection of stars, gas, and dust bound
together by gravity.
The smallest galaxies may contain only a
few hundred thousand stars, while the largest
galaxies have thousands of billions of stars.
The Milky Way galaxy contains our solar system.
Galaxies
3 Classes
A) Spiral Galaxies
B) Elliptical Galaxies
C) Irregular Galaxies
If it’s written in yellow, write it down.
Spiral Galaxies
1) Have multiple arms that spiral out.
Spiral Galaxies (continued)
2) From the side, they look like a narrow
disk.
3) The most common
type of galaxy.
4) The Milky Way is a
spiral galaxy.
5) New stars are still forming.
Barred Spiral Galaxy
A “maturing” galaxy.
It is a spiral galaxy
that has a central
bar.
Elliptical Galaxies
1) No particular structure
2) Look like flattened balls.
3) Contains trillions of stars.
4) Almost no gas or dust.
5) Contains only old stars
Irregular Galaxies
1) Do not have regular shapes.
2)Younger galaxy with
lots of dust and gas
between the stars.
A close, neighboring galaxy, the Large Magellanic
Cloud, is irregular.
The giant elliptical galaxy NGC 1132
is over twice the size of our Milky Way!
Elliptical
Spiral
Irregular
Sombrero Galaxy
Elliptical
Barred Spiral
Barred Spiral
Bird Galaxy
Elliptical
Eskimo Galaxy
Collision of a Spiral and an Irregular Galaxies
Big
Dipper
Moon
Warm-Up
Meteors
March 27
Asteroids
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Remnants of the formation of the solar system.
Rocky Composition
Reflect sunlight
Orbit the Sun in elliptical orbits
Most found in the asteroid belt
Also known as shooting stars
Most burn up as they enter Earth’s atmosphere
Icy objects
Tail always points away from the sun.
Most are fragments of large asteroids
Comets
Use the characteristics
to complete the Venn
Diagram. Write the
number in the
appropriate space.
Warm-Up
March 27
Meteors
6, 7, 10
2
1, 5
4
3, 8, 9
Asteroids
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Remnants of the formation of the solar system.
Rocky Composition
Reflect sunlight
Orbit the Sun in elliptical orbits
Most found in the asteroid belt
Also known as shooting stars
Most burn up as they enter Earth’s atmosphere
Icy objects
Tail always points away from the sun.
Most are fragments of large asteroids
Comets
Use the characteristics
to complete the Venn
Diagram. Write the
number in the
appropriate space.