Online reading group and book discussion forum
  HOME ENTER FORUMS OUR BOOKS LINKS DONATE ADVERTISE CONTACT  
View unanswered posts | View active topics It is currently Mon Dec 11, 2017 9:29 pm





Post new topic Reply to topic  [ 6 posts ] • Topic evaluate: Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average. 
Ch. 4: Between the Galaxies 
Author Message
User avatar
Years of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membership
BookTalk.org Hall of Fame

BookTalk.org Owner
Diamond Contributor 3

Joined: May 2002
Posts: 15658
Location: Florida
Thanks: 3203
Thanked: 1207 times in 955 posts
Gender: Male
Country: United States (us)
Highscores: 6

 Ch. 4: Between the Galaxies
Astrophysics for People in a Hurry
by Neil deGrasse Tyson

Ch. 4: Between the Galaxies


Please use this thread to discuss this chapter.



Thu Oct 12, 2017 2:39 pm
Profile Email WWW
User avatar
Years of membershipYears of membershipYears of membershipYears of membershipYears of membership
Nobel Laureate in Literature

Book Discussion Leader

Joined: Jun 2012
Posts: 986
Location: Wyoming
Thanks: 435
Thanked: 423 times in 338 posts
Gender: Male
Country: United States (us)
Highscores: 1

Post Re: Ch. 4: Between the Galaxies
"The universe is not only queerer than we imagine, but queerer than we can imagine." J. B. S. Haldane, Possible Worlds and Other Papers (1927).

Dwarf galaxies, runaway stars, gas clouds, dark matter, etc. etc. ad infinitum. :hmm: And here I thought inter-galactic space was empty. :? Of course, as Tyson reminds us, such ignorance is honest; without the aid of powerful telescopes and other modern detecting devices, we had no way of knowing what was out there. (A side note; 'ignorance,' traced to its roots, simply means 'without knowledge.' There is nothing wrong with ignorance; it is simple recognition that you do not know something. This is not to be confused with 'stupidity' which implies not only a lack of knowledge, but a lack of desire for knowledge.)

It is also interesting to note the (honest) misnaming of many celestial objects; the "Milky Way" (actually the dense center of our own galaxy), the Great Nebula in Andromeda (now the Andromeda Galaxy), the Greater and Lesser Magellanic Clouds (dwarf galaxies). Not bad for naked eye astronomy.

Obviously, the universe is a very crowded place. :yes:


_________________
Love what you do, and do what you love. Don't listen to anyone else who tells you not to do it. -Ray Bradbury

Always listen to experts. They'll tell you what can't be done, and why. Then do it. -Robert A. Heinlein


The following user would like to thank Cattleman for this post:
Harry Marks
Wed Nov 22, 2017 1:32 pm
Profile Email
User avatar
Years of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membership
BookTalk.org Hall of Fame

BookTalk.org Moderator
Gold Contributor

Joined: Oct 2004
Posts: 6924
Location: Da U.P.
Thanks: 1029
Thanked: 1976 times in 1592 posts
Gender: Male
Country: United States (us)

Post Re: Ch. 4: Between the Galaxies
I always think of space as a simple place. Gas clouds and burning balls and orbs of rock. I always remind myself that this very same territory - space - is where life arose. There are complexities we can't imagine, hidden by distance. The apparent simplicity is only because I consider space on a macro scale.
There's good little bits all over if you look close. Heavenly bodies all various enough to warrant a classification system that is still being thwarted by new discoveries. The expanse isn't a simple place. It's just easy to ignore.


_________________
In the beginning the Universe was created. This has made a lot of people very angry and has been widely regarded as a bad move.” - Douglas Adams


The following user would like to thank Interbane for this post:
Harry Marks
Thu Nov 23, 2017 8:26 am
Profile
User avatar
Years of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membership
Better Thread Count than Your Best Linens


Joined: May 2011
Posts: 628
Thanks: 468
Thanked: 269 times in 222 posts
Gender: None specified

Post Re: Ch. 4: Between the Galaxies
All this blithe talk of star formation and galaxy formation loses, to my mind, the sense of the time scales involved. It took billions of years to produce enough heavy elements to seed the Solar System with the stuff of the dense inner planets. Gravity is humble in its slow but steady pace, yet it eventually fires up thermonuclear generators in the form of stars, and pulls together enough of this to make the dazzling array of galaxies.

Then it "suddenly" crosses a threshold, for a large enough star, into sufficient heavy interactions to explode the star in a supernova, visible even from other galaxies at unimaginable distances. Is gravity like war, dragging on in long periods of complete boredom, only to erupt into brief moments of complete terror?



Fri Nov 24, 2017 3:28 am
Profile Email
User avatar
Years of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membership
Stupendously Brilliant

Silver Contributor

Joined: Dec 2009
Posts: 722
Location: Florida
Thanks: 254
Thanked: 406 times in 318 posts
Gender: Male
Country: United States (us)

Post Re: Ch. 4: Between the Galaxies
Harry Marks wrote:
Is gravity like war, dragging on in long periods of complete boredom, only to erupt into brief moments of complete terror?
.
It's like hand to hand combat at twenty paces.



The following user would like to thank Taylor for this post:
Harry Marks
Fri Nov 24, 2017 9:59 am
Profile Email
User avatar
Years of membershipYears of membershipYears of membershipYears of membershipYears of membershipYears of membership
Better Thread Count than Your Best Linens


Joined: May 2011
Posts: 628
Thanks: 468
Thanked: 269 times in 222 posts
Gender: None specified

Post Re: Ch. 4: Between the Galaxies
Taylor wrote:

It's like hand to hand combat at twenty paces.

With a lot of circling around.



Sat Nov 25, 2017 9:18 am
Profile Email
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] • Topic evaluate: Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average.Evaluations: 0, 0.00 on the average. 



Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:

BookTalk.org Newsletter 


Recent Posts 
• POLL: Countdown to Impeachment

Mon Dec 11, 2017 7:37 pm

LanDroid

• Ch. 8: On Being Round

Mon Dec 11, 2017 6:47 pm

Cattleman

• End Times

Mon Dec 11, 2017 3:29 pm

Robert Tulip

• Expat Memoir Living in Italy - free preview

Mon Dec 11, 2017 2:36 pm

stef7sa

• Ch. 7: The Cosmos on the Table

Mon Dec 11, 2017 12:07 pm

Cattleman

• Poem of the Day

Mon Dec 11, 2017 11:30 am

Litwitlou

• Song Lyrics Good Enough to be Poetry

Mon Dec 11, 2017 11:20 am

Litwitlou

• The Left Hand of Boredom? LOL

Mon Dec 11, 2017 7:35 am

Litwitlou

• Chapter Eleven: The Two Ivans

Mon Dec 11, 2017 6:47 am

Robert Tulip

• The Art of No Deal

Sun Dec 10, 2017 12:04 pm

Litwitlou

• Is it time for James Lee Burke to hang it up?

Sun Dec 10, 2017 12:22 am

Slaverz_Bay

• Carbon Mining

Sat Dec 09, 2017 7:57 pm

Taylor

• "Holding Hope In Our Hands"

Sat Dec 09, 2017 7:45 pm

kristinskenderi

• Woman at the Well (Venerable Fulton Sheen)

Sat Dec 09, 2017 4:53 pm

Jan_wow


Site Resources 
HELPFUL INFO:
Forum Rules & Tips
Frequently Asked Questions
BBCode Explained
Author Interview Transcripts
Be a Book Discussion Leader!

IDEAS FOR WHAT TO READ:
Bestsellers
Book Awards
• Book Reviews
• Online Books
• Team Picks
Newspaper Book Sections

WHERE TO BUY BOOKS:
• Great resource pages are coming!

BEHIND THE BOOKS:
• Great resource pages are coming!

PROMOTE YOUR BOOK!
Advertise on BookTalk.org
How To Promote Your Book

Featured Books

Books by New Authors


*

FACTS is a select group of active BookTalk.org members passionate about promoting Freethought, Atheism, Critical Thinking and Science.

Apply to join FACTS
See who else is in FACTS







BookTalk.org is a thriving book discussion forum, online reading group or book club. We read and talk about both fiction and non-fiction books as a community. Our forums are open to anyone in the world. While discussing books is our passion we also have active forums for talking about poetry, short stories, writing and authors. Our general discussion forum section includes forums for discussing science, religion, philosophy, politics, history, current events, arts, entertainment and more. We hope you join us!



Copyright © BookTalk.org 2002-2017. All rights reserved.
Display Pagerank