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?

  • AIrregular galaxies
  • BSpiral galaxies
  • CElliptical galaxies

Q2:

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

  • ASpiral galaxies
  • BElliptical galaxies
  • CIrregular galaxies

Q3:

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

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

Q4:

Which of the following figures shows a barred spiral galaxy?

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

Q5:

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

Elliptical galaxy-NGC 4660
  • AAn irregular galaxy
  • BAn elliptical galaxy
  • CA spiral galaxy

Q6:

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

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

Q7:

Which of the following galaxies has the greatest ellipticity?

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

Q8:

Which of the following galaxies has the least ellipticity?

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

Q9:

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

Spiral galaxy-Messier 81
  • AAn elliptical galaxy
  • BA spiral galaxy
  • CAn irregular galaxy

Q10:

Which of the following figures shows an irregular galaxy?

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

Q11:

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

Irregular galaxy-NGC 922
  • AAn elliptical galaxy
  • BAn irregular galaxy
  • CA spiral galaxy

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