HSU Astronomy Exam 2 Review Questions & Answers 2024/2025
A Particular galaxy has a nuclear region of more or less uniform brightness... - ANSWERSSpiral
An Astronomer studying a distant cluster of galaxies finds that several of the galaxies... - ANSWERSSa
Astronomy with a radio telescope...
A Particular galaxy has a nuclear region of more or less uniform brightness... - ANSWERSSpiral
An Astronomer studying a distant cluster of galaxies finds that several of the galaxies... - ANSWERSSa
Astronomy with a radio telescope was initiated by - ANSWERSan Amateur astronomer Grote Reber, after
Jansky had deteched
Double radio sources, quasars, and BL Laceratae objects... - ANSWERSwe view them at different angles
to the line of double jets
Faint Star like objects producing intense radio energy that eventually were called quasars - ANSWERSan
extreme redshift of emission lines that indicated high recessional velocities
IN the verification of the Hubble Law for the expansion of the universe and the determination of the
constant H0, the greatest difficulty has been - ANSWERSthe accurate determination
Seyfert galaxies are - ANSWERSspiral galaxies with extremely active cores
The Hubble Law, representing observations of distant objects in the universe relates which two
parameters? - ANSWERSThe mass of the distant object and its recession velocity
The Milky Way Galaxy appears to have a spiral structure with - ANSWERSFour separate major arms
The distance to the brightest quasar, 3C 273, is estimated to be - ANSWERS2 billion light years away
, The factor that misled Herschel into concluding that the stars of the Milky way were distributed with the
Sun at the center of the Galaxy was - ANSWERSinterstellar dust, which obscured the more distant stars
and thereby localized his observations
What is an Einstein ring? - ANSWERSAn example of the image formed by a gravitational lens
What is the Hubble classification for a spiral galaxy with a small nuclear region and loosely wound arms?
- ANSWERSSc
What is the Local Group - ANSWERSA cluster of about 30 galaxies
What is the galactic halo? - ANSWERSA spherical distribution of stars and globular clusters centered on
the nuclear bulge
What is the most outstanding feature of a quasar compared to other objects in deep space? -
ANSWERSIts enormous output of energy
What method is used to determine the distances of very remote galaxies? - ANSWERSUse of their
spectral redshifts and the Hubble Law
What name is given to a galaxy with a smooth distrubution of brightness and a round shape? -
ANSWERSE0
What name is given to the galaxy with a smooth distrubution of brighness and a very elongated shape -
ANSWERSE7
Where is the Sun located in our galaxy - ANSWERSIn or close to the Orion Arm
Who developed the classification system that divides galaxies into spiral, elliptical , and irregular and
classifies spirals by the size... - ANSWERSEdwin Hubble
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