# ASTRO TEST 2 2015

In the classification of elliptical galaxies (E0, E1, . . . , E7), the numbers refer to
(a) the egocentricity of the astronomer who discovered the galaxy, with 7 being the most egotistical and 0 being the most humble.
(b) the ellipticity of the galaxy, with 0 appearing spherical and 7 appearing highly elliptical.
(c) the size of the galaxy, with 0 having the smallest size and 7 the largest size.
(d) the colour of the galaxy, with 0 being closer to the blue end of the spectrum and 7 being closer to the red end of the spectrum
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In the classification of elliptical galaxies (E0, E1, . . . , E7), the numbers refer to
(a) the egocentricity of the astronomer who discovered the galaxy, with 7 being the most egotistical and 0 being the most humble.
(b) the ellipticity of the galaxy, with 0 appearing spherical and 7 appearing highly elliptical.
(c) the size of the galaxy, with 0 having the smallest size and 7 the largest size.
(d) the colour of the galaxy, with 0 being closer to the blue end of the spectrum and 7 being closer to the red end of the spectrum
Sc galaxies have
(a) small nuclei, lots of gas and dust concentrated in spiral arms, and many hot luminous, young stars.
(b) small nuclei, lots of gas and dust concentrated in spiral arms, and very few hot luminous, young stars.
(c) large nuclei, lots of gas and dust concentrated in spiral arms, and many hot luminous, young stars.
(d) large nuclei, lots of gas and dust concentrated in spiral arms, and very few hot luminous, young stars.
Barred spiral galaxies differ from spiral galaxies because a barred spiral
(a) has an unusually large number of bars and night clubs.
(b) is not allowed entry to intergalactic hot spots unless it is at least 19 eons old.
(c) has between 10 and 20 spoke-like bars emanating from the central bulge, so that it looks somewhat like a wheel.
(d)has an elongated central bulge (i.e., a "bar").
Using data collected by Vesto Slipher, and using his own observations, in 1929 Edwin Hubble discovered a relationship between
(a) the age of a galaxy and the speed with which its hairline recedes.
(b)the distance of a galaxy and its recession speed.
(c) the size of a galaxy and its recession speed.
(d) the amount of gas and dust contained in a galaxy and its recession speed