Stars, Galaxies, and the Universe Flashcards
Who developed a system for naming stars that used Greek letters and Latin forms of the stars’ constellation names?
Johann Bayer
According to the apparent magnitude given, which of the following stars is the brightest?
A. Alpha Centauri A, +0.03
B. Deneb, + 1.25
C. Lacaille 2, +7.34
D. Barnard’s Star, +9.51
A. Alpha Centauri A, +0.03
Which pair of elements makes up the bulk of most stars, including our sun?
hydrogen and helium
Which two factors are used as the axes to plot stars on the Hertzsprung-Russell diagram?
temperature and luminosity
Planetary nebulas, white dwarfs, and neutron stars…
are later stages in the life of a star
Charles Messier’s objective when cataloging and naming the nebulas was…
to help astronomers avoid confusing a nebula with a comet
Missing 7
Visual Double Star
Which of the following statements does not apply to most galaxies?
A. They have a supernova in the center.
B. They seem to be held together by gravity.
C. They are made of dust, gases, bilions of stars, and more,
D. They rotate around a center of mass.
A. They have a supernova in the center.
Which of the following properties is not characteristic of quasars?
A. They are very energetic.
B. They are brighter than a galaxy.
C. They are very well understood,
D. They emit powetful radio signals.
C. They are very well understood,
What do we observe in the universe?
cosmological red shift and cosmic microwave
According to the secular view of cosmogony, the universe is…
about 13.8 billion years old
What would a secular astronomer believe is the first stage of stellar evolution?
a protostar
What is the most difficult question of cosmogony for biblical creationists?
How does an immense, very old-looking universe fit into a young creation?
The universe is immense because it…
shows how great God is
All constellations are asterisms, but not all asterisms are constellations.
True
A star that has a diameter 100 times larger than our sun is classified as a giant.
False
As a yellow dwarf, the sun lies on the main sequence of the Hertzsprung-Russell diagram.
True
Astronomers believe that some black holes formed at the beginning of the
universe and that others are remnants of supernovas.
True
Astronomers believe that most of the stars in our galaxy are eclipsing binary stars.
False
Globular star clusters are held together by gravity, but open clusters are not.
False
The largest galaxies known are elliptical galaxies.
True
Cosmologists assume that the universe is old because light travels so fast.
False
The Big Bang theory of cosmology does not address what we observe about the
universe.
False
If the light-created-in-transit theory is true, then we can’t really trust our senses to provide us real information about the universe.
True
