Worksheet: Types of Galaxies

In this worksheet, we will practice classifying galaxies based on their shape and the prominence of their features.

Q1:

Which of the three main classes of galaxies—elliptical, spiral, and irregular—is, on average, the smallest?

  • ASpiral galaxies
  • BIrregular galaxies
  • CElliptical galaxies

Q2:

Which of the three main classes of galaxies—elliptical, spiral, and irregular—is, on average, the largest?

  • ASpiral galaxies
  • BIrregular galaxies
  • CElliptical galaxies

Q3:

Which of the following galaxies has the least prominent central bar?

  • A
    Barred Spiral galaxy - UGC 12158
  • B
    spiral galaxy - Messier 77
  • C
    Spiral galaxy - Messier 81
  • D
    Barred spiral galaxy - NGC 1300
  • E

Q4:

Which of the following figures shows a barred spiral galaxy?

  • A
    Spiral galaxy-NGC 4414
  • B
    Barred Spiral galaxy-NGC 1300
  • C
    Elliptical galaxy-NGC 4660
  • D
    Elliptical galaxy-NGC 4458
  • E
    Irregular galaxy-NGC 922

Q5:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Elliptical galaxy-NGC 4660
  • AAn irregular galaxy
  • BA spiral galaxy
  • CAn elliptical galaxy

Q6:

Which of the following galaxies has the most prominent central bar?

  • A
    Spiral galaxy - Messier 81
  • B
    spiral galaxy - Messier 77
  • C
    Barred Spiral galaxy - UGC 12158
  • D
    Barred spiral galaxy - NGC 1300

Q7:

Which of the following galaxies has the greatest ellipticity?

  • A
    Elliptical galaxy-Messier 87
  • B
    Elliptical galaxy - ESO 306-17
  • C
    Elliptical galaxy-IC 2006
  • D
    Elliptical galaxy - NGC 4458
  • E
    Elliptical - NGC 4660 - 72ppi

Q8:

Which of the following galaxies has the least ellipticity?

  • A
    Giant Elliptical galaxy-ESO 325-G004
  • B
    Elliptical galaxy-NGC 3377
  • C
    Elliptical galaxy-ESO 306-17
  • D
    Elliptical galaxy-IC 2006
  • E
    Elliptical galaxy-NGC 4660

Q9:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Spiral galaxy-Messier 81
  • AA spiral galaxy
  • BAn elliptical galaxy
  • CAn irregular galaxy

Q10:

Which of the following figures shows an irregular galaxy?

  • A
    Barred Spiral galaxy-NGC 1300
  • B
    Irregular galaxy-NGC 922
  • C
    Elliptical galaxy-NGC 4458
  • D
    Barred Spiral galaxy-NGC 5584
  • E
    Elliptical galaxy-NGC 4660

Q11:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Irregular galaxy-NGC 922
  • AA spiral galaxy
  • BAn elliptical galaxy
  • CAn irregular galaxy

Q12:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Barred Spiral galaxy - UGC 12158
  • AAn irregular galaxy
  • BA spiral galaxy
  • CAn elliptical galaxy

Q13:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Spiral galaxy-NGC 4414
  • AAn elliptical galaxy
  • BAn irregular galaxy
  • CA spiral galaxy

Q14:

Which of the following figures shows an elliptical galaxy?

  • A
    Spiral galaxy - Whirlpool Galaxy - cropped
  • B
    Ring - AM 0644-741
  • C
    Starburst  Irregular - NGC 4449
  • D
    Irregular galaxy-NGC 922
  • E
    Giant Elliptical galaxy-ESO 325-G004-edited

Q15:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Elliptical galaxy-ESO 306-17
  • AAn irregular galaxy
  • BA spiral galaxy
  • CAn elliptical galaxy

Q16:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Elliptical galaxy - NGC 4458
  • AAn irregular galaxy
  • BAn elliptical galaxy
  • CA spiral galaxy

Q17:

Does the figure show a spiral, an elliptical, or an irregular galaxy?

Barred spiral galaxy - NGC 1300
  • AAn irregular galaxy
  • BA spiral galaxy
  • CAn elliptical galaxy

Q18:

Which of the following galaxies is a ring galaxy?

  • A
    Spiral galaxy-Messier 81
  • B
    Spiral galaxy - Whirlpool Galaxy - cropped
  • C
    Elliptical galaxy-Messier 87
  • D
    Ring galaxy - Hoag's Object - 72ppi
  • E
    Irregular galaxy-NGC 922

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