Astronomy 1020-Final Exam Study Guide Questions and Answers 2024
4 views 0 purchase
Course
Astronomy 1020
Institution
Astronomy 1020
How did Hubble classify galaxies? - -shape and structural properties
-stellar content
-gas and dust
-star formation
-stellar motion
What are the different categories Hubble used to classified galaxies ? - Spirals, barred spirals, ellipticals, irregulars
What are the characteristics of spi...
Astronomy 1020-Final Exam Study
Guide Questions and Answers 2024
How did Hubble classify galaxies? - -shape and structural properties
-stellar content
-gas and dust
-star formation
-stellar motion
What are the different categories Hubble used to classified galaxies ? - Spirals, barred
spirals, ellipticals, irregulars
What are the characteristics of spiral galaxies? - -flattened galactic disk with spiral arms
-central galactic bulge
-extended halo of faint old stars -spirals are classified according to the size of the
central bulge and tightness of winding in spiral arms
What are the characteristics of elliptical galaxies? - -dense central nucleus
-no spiral arms or disks
-little cool gas and dust
-no ongoing star formation
-mainly old red low-mass stars with random orbits
What is the Tully-Fisher relationship and how is it used? - measures distance to spirals
within 200mpc; it is the correlation between rotational speed and luminosity of spiral
galaxies
Astronomy 1020-Final Exam
, Astronomy 1020-Final Exam
What cluster does the Milky Way belong to? What are its characteristics? - Local group;
has 50 galaxies, 1 Mpc in diameter
What is Hubble's law, and how is it used? - rate that a galaxy recedes is directly
proportional to its distance from us; determines the distance and recessional velocity
How does redshift relate to recessional velocity and distance to a galaxy? - redshift can
find the distance to an object by measuring its redshift which directly correlates to
recessional velocity
What is an active galaxy? - -has luminosity >10^10 L
-small nucleus
-substancial radiation at all wavelengths
-explosive activity
-non-thermal spectra
-probably has supermassive black hole in center
How is an active galaxy different from a normal galaxy? - active and normal galaxies
only differ in the degree of the component of non-stellar radiation
What makes a galaxy active? - the active galactic nucleus
What is a radio galaxy? - galaxy that emits radio radiation very strongly;often associated
with visible elliptical galaxies; energy is released from hot gas in nucleus; X-ray
emmitting jets from galactic center aligned with lobes
What is a quasar? - galaxies at an early stage in formation with a star like appearance
Astronomy 1020-Final Exam
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller PossibleA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
