ASTR 1346 FINAL QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
The picture below shows the Hubble Telescope's view of the 4-billion-
light-year distant Abell 370 cluster (many of the fuzzy, yellowish blobs
are light from large elliptical galaxies or the nuclear bulges of spiral
galaxies). Throughout the picture, you may notice streaks of light (two
of such which are highlighted in yellow boxes in the photograph). What
are those semi-circular arcs and streaks of light? Ans✓✓✓The light of
even more distant background galaxies bent and distorted by
the gravity of Abell 370
Which of the following theories was first proposed by Belgian
cosmologist, astrophysicist, and Jesuit priest Georges Lemaître?
Ans✓✓✓The primordial atom theory
What is the "steady state Universe" theory? Ans✓✓✓The theory that the
Universe is infinitely large, old, and permanent
Which of the following astronomers is not considered to be a
cosmologist? Ans✓✓✓Neil de Grasse Tyson
Which of the following astronomers falls in to the category of early
cosmologist? Ans✓✓✓Edwin Hubble
Which cosmologist was one of the first to measure the velocity of "spiral
nebulae?" While this astronomer didn't have verified or known distances
to these objects so he could not say where they lay in space, he argued
, that they were moving so quickly away from the Milky Way that they
were not under the gravitational influence of our Galaxy (unlike the stars
of the disk and halo and nucleus) and thus could not be part of our
Galaxy. They were, in actuality, independent, Milky Way-like spiral
galaxies. Ans✓✓✓Vesto Slipher
Taking a very, very wide view of the Universe, what is the distribution
of matter like? Ans✓✓✓Remarkably smooth
How old is the Universe? Ans✓✓✓14 billion years
What was the Universe like before the Big Bang? Ans✓✓✓The concept
of space - as well as time - only began with the expansion of the
Universe, so by definition, there couldn't have been a "before" the
Universe
What is the visible effect of the phenomenon known as "dark energy" ?
Ans✓✓✓Dark energy causes empty voids in extragalactic space to
increase in
size
What is 14 billion light years from the Milky Way? Ans✓✓✓The most
distant visible point in the Universe
On large scales the Universe is: Ans✓✓✓Expanding everywhere
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
The picture below shows the Hubble Telescope's view of the 4-billion-
light-year distant Abell 370 cluster (many of the fuzzy, yellowish blobs
are light from large elliptical galaxies or the nuclear bulges of spiral
galaxies). Throughout the picture, you may notice streaks of light (two
of such which are highlighted in yellow boxes in the photograph). What
are those semi-circular arcs and streaks of light? Ans✓✓✓The light of
even more distant background galaxies bent and distorted by
the gravity of Abell 370
Which of the following theories was first proposed by Belgian
cosmologist, astrophysicist, and Jesuit priest Georges Lemaître?
Ans✓✓✓The primordial atom theory
What is the "steady state Universe" theory? Ans✓✓✓The theory that the
Universe is infinitely large, old, and permanent
Which of the following astronomers is not considered to be a
cosmologist? Ans✓✓✓Neil de Grasse Tyson
Which of the following astronomers falls in to the category of early
cosmologist? Ans✓✓✓Edwin Hubble
Which cosmologist was one of the first to measure the velocity of "spiral
nebulae?" While this astronomer didn't have verified or known distances
to these objects so he could not say where they lay in space, he argued
, that they were moving so quickly away from the Milky Way that they
were not under the gravitational influence of our Galaxy (unlike the stars
of the disk and halo and nucleus) and thus could not be part of our
Galaxy. They were, in actuality, independent, Milky Way-like spiral
galaxies. Ans✓✓✓Vesto Slipher
Taking a very, very wide view of the Universe, what is the distribution
of matter like? Ans✓✓✓Remarkably smooth
How old is the Universe? Ans✓✓✓14 billion years
What was the Universe like before the Big Bang? Ans✓✓✓The concept
of space - as well as time - only began with the expansion of the
Universe, so by definition, there couldn't have been a "before" the
Universe
What is the visible effect of the phenomenon known as "dark energy" ?
Ans✓✓✓Dark energy causes empty voids in extragalactic space to
increase in
size
What is 14 billion light years from the Milky Way? Ans✓✓✓The most
distant visible point in the Universe
On large scales the Universe is: Ans✓✓✓Expanding everywhere
