astro 1-exam 3 Latest Update -

astro 1-exam 3 Latest Update - 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

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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

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