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Quasar

en.wikipedia.org/wiki/Quasar

Quasars or quasi-stellar radio sources are the most energetic and distant members of a class of ... Most quasars were formed approximately 12 billion years ago, and they are normally .... nearby lar...

Final Exam (Quizzes 11-12) - Physics And Astronomy 185 with ...

www.studyblue.com/notes/note/n/final-exam-quizzes-11-12/deck/868447

May 2, 2011 ... Why should galaxy collisions have been more common in the past than they are today? Galaxies were closer together in the past because the ...

Quiz 12 - Physics And Astronomy 187 with Keller at University of ...

www.studyblue.com/notes/note/n/quiz-12/deck/17203876

Apr 24, 2016 ... Observations at different distances show galaxies of different ages ... Get started today for free ... observations of distant objects reveal them as they were in the past ... cloud more likely to produce an elliptical galaxy than a spiral galaxy? ... Why should galaxy collisions have been more common in the past ....

Galaxies - Astronomy Notes

www.astronomynotes.com/galaxy/s10.htm

May 1, 2013 ... Models for galaxy formation have been of two basic types: ... The "top-down" model on the origin of the galaxies says that they formed from huge gas clouds larger than the resulting galaxy. ... There should still be galaxies forming today. .... much closer together, so collisions should have been more common ...

Selected Answer The higher gas density forms stars more - NATH ...

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Question 26 0.5 out of 0.5 points Why should galaxy collisions have been more common in the past than they are today? Selected Answer: Galaxies were closer  ...

Elliptical Galaxy Facts & Definition - Space.com

www.space.com/22395-elliptical-galaxies.html

Aug 15, 2013 ... Astronomers have identified more spiral galaxies than ellipticals, but that is ... If fewer elliptical galaxies have been spotted, why do astronomers think they ... The universe is a violent place, and collisions between galaxies are ...

Class #32 (November 2) - NMSU Astronomy

astronomy.nmsu.edu/tharriso/ast110/class24.html

Today we will take a closer look at ideas for why there are different types of galaxies. ... If you have been watching the news coverage of the revolutions in the Middle ... Giant ellipticals are about 10X more massive than the largest spiral galaxies. .... Galaxy collisions are quite common, here are two spirals ( knicknamed the ....

Testbank - The Cosmic Perspective - Scribd

www.scribd.com/doc/258349250/Testbank-The-Cosmic-Perspective

C) We can observe the evolution of a single galaxy over time. D) We can observe ... do I see? A) the light from the galaxy as it is today, but it is blueshifted ... E) Galaxy collisions shouldn't have been more common in the past than they are now.

HubbleSite - NewsCenter - Hubble Identifies Primeval Galaxies ...

hubblesite.org/newscenter/archive/releases/1994/52/background/

Dec 6, 1994 ... Therefore, these galaxies, which we observe as they were less than two billion ... so many more spiral galaxies in rich clusters long ago than there are today. Apparently, many spiral galaxies have since been destroyed or disappeared. .... galaxy collisions can actually trigger the formation of massive stars.

NASA's Hubble Shows Milky Way is Destined for Head-On Collision

www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html

May 31, 2012 ... The Milky Way is destined to get a major makeover during an encounter ... NASA astronomers announced Thursday they can now predict with certainty the ... be tossed much farther from the galactic core than it is today. ... between galaxies were more common in the past when the universe was smaller.

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Chapter 21 - Astronomy 103 with Lane at College of Staten Island ...

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May 17, 2015 ... Get started today for free. * The material on this site is ... Why does faster rotation tend to lead to a spiral galaxy, rather than an elliptical galaxy? Faster rotation leads to collisions among ... Why should galaxy collision have been more common in the past than they are today? Galaxies were closer together in ...

Physics 5 Quiz #7 - CASS

casswww.ucsd.edu

A. the light from the galaxy as it is today, but it is blueshifted ... Why should galaxy collisions have been more common in the past than they are today?

Cosmic Evolution - Epoch 2 - Galactic Evolution

www.cfa.harvard.edu

However galaxies might have originated, either their formative stages or ..... by collisions and mergers, which are more common in dense galactic environments ? ... in the past than they are today, galaxies do seem to have been more active ...