Stars/Galaxies/Quiz

Galaxies is a lecture studying a specific type of astronomical objects. It is also a mini-lecture for a quiz section as part of the radiation astronomy course on the principles of radiation astronomy.

You are free to take this quiz based on 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 template. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

Suggestion: Have the lecture available in a separate window.

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
{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 - ✱
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{A cosmic ray may originate from what astronomical source? - Jupiter - the solar wind - the diffuse X-ray background - Mount Redoubt in Alaska - the asteroid belt + an active galactic nucleus
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{Yes or No, 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. - Yes + No
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{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
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{True or False, As a galaxy is made up of millions or billions of stars, a solitary star does not exist in a galaxy. - TRUE + FALSE
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{Spiral 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
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{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
 * type="[]"}

{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 { C (i) }. { H (i) }. { A (i) }. { G (i) }. { F (i) }. { B (i) }. { E (i) }. { D (i) }.
 * type="{}"}

{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 { C (i) }. { H (i) }. { A (i) }. { G (i) }. { F (i) }. { B (i) }. { E (i) }. { D (i) }.
 * type="{}"}

{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 { D (i) }. { C (i) }. { H (i) }. { A (i) }. { G (i) }. { F (i) }. { B (i) }. { E (i) }.
 * type="{}"}

Hypotheses

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