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ASTRONOMY DSST, ASTRONOMY DSST TEST REVIEW
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ASTRONOMYDSST,
ASTRONOMY DSST
TEST REVIEW
Quasar - Answers -Short for "quasi-stellar radio source," a bright, point-like object that
produces the luminosity of 100 to 1,000 galaxies within a region the size of a solar
system.
Pulsar - Answers -A rapidly rotating neutron star which emits radiation in magnetic
pulses.
Redshift - Answers -A shift in the lines of an object's spectrum toward the red end. It
indicates that an object is moving away from the observer. The larger it is, the faster the
object is moving.
Asterism - Answers -A cluster of stars (or a small constellation).
Equinox - Answers -Either of the two celestial points at which the celestial equator
intersects the ecliptic plane.
Ecliptic Plane - Answers -the plane of the Earth's orbit around the Sun.
Brown Dwarf - Answers -"Failed" star; a star not massive enough to sustain nuclear
fusion.
Calderas - Answers -Depressions that form when a volcano collapses, as opposed to
craters formed by meteoroid impact.
Red Giant - Answers -A star that expands and cools once it runs out of hydrogen fuel.
,White Dwarf - Answers -Stage in which a star has used up its helium and its outer
layers escape into space, leaving behind a hot, dense core that contracts.
Galactic Bulge - Answers -Also called nuclear bulge, this is a swelling at the center of
spiral galaxies. Bulges consist of old stars and extend out a few thousand light-years
from the galactic centers.
In the development of _______________ thought, certain original and imaginative
individuals began to make systematic observations of celestial objects to formulate
theories and explain their behavior. - Answers -Astronomical
The _______________ must call upon all his resources of ingenuity and employ more
clever devises than the most astute detective to solve the problems of his business. -
Answers -Astronomer
The first significant development of astronomy as a science took place in ancient
_____________. - Answers -Greece
The earliest Greek scientists were the ______________, who lived in what is now Asia
Minor. - Answers -Ionians
_________________ was originally an Ionian in belief, but later founded a school of
thought of his own regarding the shape of the planets. - Answers -Pythagoras
A member of the Pythagorean school, ______________ was the first to introduce the
concept that the Earth is in motion. - Answers -Philolaus
One of the most famous of the Greek philosophers was ________________. - Answers
-Aristotle
The shape of the _________ in the sky depends simply on how much of its daylight
hemisphere is turned to our view. - Answers -Moon
_______________ of Samos was the first astronomer of the Alexandrian school and
devised an ingenious method to find the relative distances from the Earth to the sun and
moon. - Answers -Aristarchus
Aristarchus also devised an ingenious technique to determine the relative ___________
of the sun, moon, and Earth. - Answers -Sizes
The _________________ hypothesis states that the Earth orbits the sun and the Earth
is not the center of the universe. - Answers -Heliocentric
The greatest astronomer of ancient times was _________________. - Answers -
Hipparchus
, Another Greek astronomer, Cladius ______________, compiled a series of thirteen
volumes on astronomy known as the Almagest. - Answers -Ptolemy
Nicolas _______________ was born in Thorn on the Vistula in Poland. His forte was
mathematics. - Answers -Copernicus
Copernicus's excellence as a mathematician and astronomer gave him the information
to determine values for the distances of the various ____________ from the sun. -
Answers -Planets
After beginning training for a medical career, ______________ found that he had little
interest in the subject and later switched to mathematics. - Answers -Galileo
Galileo's greatest contributions were in the field of ______________. - Answers -
Mechanics
Galileo has often been called the ___________ of modern astronomy. - Answers -
Father
Neutron Star - Answers -The small, dense remains of a high-mass star after a
supernova.
Radio Galaxy - Answers -Very bright, often giant, elliptical galaxy type that emits as
much or more energy in the form of radio wavelengths as it does wavelengths of visible
light.
Seyfert Galaxy - Answers -Type of active galaxy whose emissions come from a very
small region within the nucleus of an otherwise normal-looking spiral system.
Radiation - Answers -Energy that is radiated or transmitted in the form of rays or waves
or particles.
Electromagnetic Spectrum - Answers -Arrangement of electromagnetic radiation--
including radio waves, visible light, gamma rays, X-rays, ultraviolet waves, infrared
waves, and microwaves--according to their wavelengths.
Comet - Answers -A relatively small extraterrestrial body consisting of a frozen mass
that travels around the Sun in a highly elliptical orbit.
Binary Star - Answers -A pair of stars held together by their mutual gravity and in orbit
about each other which can be seen with a telescope as separate objects.
Solstice - Answers -Either of the two times of the year when the Sun is at its greatest
distance from the celestial equator.
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