astro 1-exam 3 Latest Update 2024-2025 Actual
Exam from Credible Sources with 110 Questions
and Verified Correct Answers Golden Ticket to
Guaranteed A+ Verified by Professor
are the brightest stars always the closest? - CORRECT ANSWER: brightest stars tend
to be biased towards stars that have large luminosities, so that they appear bright to us
even at large distances; we simply can't see low- luminosity stars if they are too far
away
At what angle does the star appear to move relative to distant stars in the parallax
method? - CORRECT ANSWER: the star appears to move (relative to distant stars) by
an angle 2 times that of the parallax angle
At what angle does the star appear to move relative to distant stars in the parallax
method? - CORRECT ANSWER: the star appears to move (relative to distant stars) by
an angle 2 times that of the parallax angle
black holes: can anything escape a black hole? can light? - CORRECT ANSWER: the
gravity of collapsed (very dense) object is so large that even light cannot escape
black holes: do black holes suck things in? - CORRECT ANSWER: black holes do not
suck things in; if you are far enough away from them they act like normal objects withe
the same mass
black holes: what can be used to measure the mass of a black hole? - CORRECT
ANSWER: the speed of the orbit of a star in a binary star system with a black hole
black holes: what happens to object falling into a black hole? - CORRECT ANSWER:
tidal forces are created near a black hole and objects are stretched because the force
on the nearest part is so much larger than the force on the farthest part
, black holes: what is at the center? - CORRECT ANSWER: a singularity, a point of
infinite destiny
black holes: what is the event horizon? - CORRECT ANSWER: the sphere around a
black hole from within nothing can escape
black holes: what would happen to a clock if if it was falling in a black hole? -
CORRECT ANSWER: intense gravity of a black hole warps space so that a clock would
appear to slow as it falls down
black holes: Where do they come from? - CORRECT ANSWER: it is the end state of a
high mass star (> 40 solar masses), left behind after a supernova explosion
Can you identify on the H-R diagram - CORRECT ANSWER: hot and cold stars; blue
and red stars
high and low luminosity stars
large radius and small radius stars
high mass and low mass stars
stars converting hydrogen to helium at their cores
red giants and white dwarfs
stars that will have a long or short lifetime
for main sequence stars, how does the age range from those stars? - CORRECT
ANSWER: age ranges from few million years for more massive stars to much more than
14 billion years (age of the universe) for less massive stars; REMEMBER, the more
massive stars use their greater fuel supply more rapidly
for stars on the main sequence does higher temperature= higher luminosity? -
CORRECT ANSWER: yes
how do spectral classes of stars run from hotter to cooler on the H-R diagram? what is
the acronym for this? - CORRECT ANSWER: OBAFGKM; oh, be a fine guy/girl, kiss me
Exam from Credible Sources with 110 Questions
and Verified Correct Answers Golden Ticket to
Guaranteed A+ Verified by Professor
are the brightest stars always the closest? - CORRECT ANSWER: brightest stars tend
to be biased towards stars that have large luminosities, so that they appear bright to us
even at large distances; we simply can't see low- luminosity stars if they are too far
away
At what angle does the star appear to move relative to distant stars in the parallax
method? - CORRECT ANSWER: the star appears to move (relative to distant stars) by
an angle 2 times that of the parallax angle
At what angle does the star appear to move relative to distant stars in the parallax
method? - CORRECT ANSWER: the star appears to move (relative to distant stars) by
an angle 2 times that of the parallax angle
black holes: can anything escape a black hole? can light? - CORRECT ANSWER: the
gravity of collapsed (very dense) object is so large that even light cannot escape
black holes: do black holes suck things in? - CORRECT ANSWER: black holes do not
suck things in; if you are far enough away from them they act like normal objects withe
the same mass
black holes: what can be used to measure the mass of a black hole? - CORRECT
ANSWER: the speed of the orbit of a star in a binary star system with a black hole
black holes: what happens to object falling into a black hole? - CORRECT ANSWER:
tidal forces are created near a black hole and objects are stretched because the force
on the nearest part is so much larger than the force on the farthest part
, black holes: what is at the center? - CORRECT ANSWER: a singularity, a point of
infinite destiny
black holes: what is the event horizon? - CORRECT ANSWER: the sphere around a
black hole from within nothing can escape
black holes: what would happen to a clock if if it was falling in a black hole? -
CORRECT ANSWER: intense gravity of a black hole warps space so that a clock would
appear to slow as it falls down
black holes: Where do they come from? - CORRECT ANSWER: it is the end state of a
high mass star (> 40 solar masses), left behind after a supernova explosion
Can you identify on the H-R diagram - CORRECT ANSWER: hot and cold stars; blue
and red stars
high and low luminosity stars
large radius and small radius stars
high mass and low mass stars
stars converting hydrogen to helium at their cores
red giants and white dwarfs
stars that will have a long or short lifetime
for main sequence stars, how does the age range from those stars? - CORRECT
ANSWER: age ranges from few million years for more massive stars to much more than
14 billion years (age of the universe) for less massive stars; REMEMBER, the more
massive stars use their greater fuel supply more rapidly
for stars on the main sequence does higher temperature= higher luminosity? -
CORRECT ANSWER: yes
how do spectral classes of stars run from hotter to cooler on the H-R diagram? what is
the acronym for this? - CORRECT ANSWER: OBAFGKM; oh, be a fine guy/girl, kiss me
