Module 3 Lab 9 Galaxies Classification Lab
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Red Rocks Community College *
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1032
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Astronomy
Date
Jan 9, 2024
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docx
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11/28/23 worked alone
1. M31 (Andromeda Galaxy) 61 kpc, Milky way 40.0 kpc, M33 (triangulum Galaxy) 14.0
kpc, Large Magellanic Cloud 6.1 kpc, Small Magellanic Cloud (SMC) 4.6 kpc. These galaxies
contain millions or billions of stars. This is despite the fact that they are much smaller than our
own Milky Way galaxy.
2.
M31 (the Comet of Andromeda), M33 (the Comet of Triagulun), and the Large Magellanic
Cloud are the largest. M31, M33, and the Large Magellanic Cloud are the largest of our local
group.They appear in our night skies. An angular shape is an angle as it appears in your field of
view.
11/28/23 worked alone
11/28/23 worked alone
The Cluster
Coma Cluster
Ellipticals
Lenticulars
Regular & Barred Spirals
Tot
Image A
9
9
0
1
Image C
5
10
3
1
Sum of A & C
(e)14
(f)19
(g)3
(h
The Field
The Field
Ellipticals
Lenticulars
Regular & Barred Spirals
Total #
Image B
9
8
0
17
Image D
11
8
0
19
Sum of B & D
(i)20
(j)16
(k)0
(m)36
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11/28/23 worked alone
1.
Statistically, a higher percentage of spiral galaxies was observed in the cluster. But the
same number of all galaxies was observed in the field and in the cluster.
Part 3. Additional Research.
Elliptical galaxies. In the air they look like discs in the sky. The center of the galaxy is far
brighter than the outer edges. These galaxies are rated E0 to E7 based on the ellipse of the
galaxy, with E7 being the flatter of the two. Elliptical galaxies contain young stars.
Clusters are spiral galaxies, bulges, discs and haloes. The old central star forms the crust.
Gas, dust, and asteroids form spiral arms from the center that comprise the disk. The halo
of spherical objects emerging around the galaxy’s circumference. You can see circular
groups here.
The name Irregular corresponds well with these constellations. They are not consistent
due to their irregular shape. There are two groups, Irr I and Irr II. The regions of
hydrogen gas and Younghot stars are classified as Irr I. Unlike Irr I, Irr II galaxies are
mainly dust. In IrrII galaxies, stars are blocked by dust and cannot be seen. "Erin
McNally CU 2000"These also correspond to the Hubbles distribution system, the tuning
fork. This divides galaxies from the oldest to the youngest
Sources cited
Astronomy 801: Planets, Stars, Galaxies, and the Universe
, Department of Astronomy and
Astrophysics, The Pennsylvania State University., 2017,
www.e-
education.psu.edu/astro801/content/l9_p7.html
.
McNally, Erin. "Types and Classification of Galaxies."
CLASSIFICATION
, Erin McNally, 2000,
www.astro.cornell.edu/academics/courses/astro201/galaxies/types.htm
.