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Barred spiral galaxy NGC 1300 is photographed by the Hubble telescope. Credit: NASA, ESA, and The Hubble Heritage Team STScI/AURA).

Spiral galaxies is a lecture and an article studying a specific type of astronomical object.

You are free to take this quiz based on spiral galaxies at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{radiation astronomy resources}} template. This should give you adequate background to get 100 %.

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To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing!

Quiz[edit | edit source]


1 The galaxy image at the top of the page has which type of rotational symmetry?

one-fold - ⊙
two-fold - ⊖
three-fold - ▲
four-fold - ◈
five-fold - ✪
six-fold - ✱

2 Yes or No, Active galactic nuclei do not occur in spiral galaxies generally.


3 A cosmic ray may originate from what astronomical source?

the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
an active galactic nucleus

4 True or False, Any small luminous green dot appearing in the cloudless portion of the night sky, especially with a fixed location relative to other such dots is most likely to be an active galactic nucleus.


5 The use of the principle of line of sight allows what phenomenon to be determined?

the Moon is closer to the Earth than the Sun
the planet Mercury is nearer to the Earth than Venus
any cumulus cloud overhead follows the Sun across the sky
the plane of the Earth's orbit around the Sun is in the plane of the galaxy
the surface of the photosphere of the Sun is hotter than the surface of Mars
lightning always precedes rain

6 Sprial galaxies have which of the following in common?

spiral arms
a spheroidal shape
may appear lenticular
is irregular
arms of younger stars
may contain star clusters
dust lanes

7 Phenomena associated with the Milky Way are?

spiral arms
a spheroidal shape
a standard to differentiate dwarf galaxies
often referred to as the Galaxy
arms of younger stars
contains star clusters
dust lanes
extended red emission (ERE)
a faint galaxy heavy with dark matter may orbit it
larger than the Andromeda galaxy

8 Complete the text:

Match up the item letter with each of the possibilities below:
Einstein ring - A
stellar nebula - B
Andromeda galaxy - C
Triplet galaxies interacting - D
Hubble galaxies - E
Dark matter halo simulation - F
Fairall 9 (Seyfert galaxy in X-rays) - G
Tycho Brahe observatory, remotely controlled telescope, captured galaxy - H
Andromeda's Colorful Rings.jpg


A Horseshoe Einstein Ring from Hubble.JPG

SWIFT J0123.9-5846 Hard X-ray.jpg

Dark matter halo.png

AmCyc Nebula - Stellar Nebula.jpg

Dorian Gray.jpg

Cosmic Interactions.jpg


9 Complete the text:

Match up the item letter with each of the possibilities below:
Sa - A
Sb - B
Sc - C
SBa - D
SBb - E
SBc - F
Irr - G
S0 - H
M101 hires STScI-PRC2006-10a.jpg

Ngc5866 hst big.png

M104 - Sombrero.jpg

Starburst in NGC 4449 (captured by the Hubble Space Telescope).jpg

Caldwell 44.jpg


The VLT goes lion hunting.jpg

NGC 2859.jpg


10 Complete the text:

Match up the item letter with each of the possibilities below:
E0 - A
E1 - B
E2 - C
E3 - D
E4 - E
E5 - F
E6 - G
E7 - H

M32 Lanoue.png

Messier 105 2MASS.jpg

Ngc185 rgb combined.jpg

2MASS NGC 4125 JHK.jpg

NGC 1427 Hubble WikiSky.jpg

M105 (37482401952).jpg

at left


Hypotheses[edit | edit source]

  1. Galaxies are primarily a product of the galactic magnetic field.

See also[edit | edit source]

External links[edit | edit source]