Search found 7 matches

by John Carswell
Sat Jan 21, 2012 11:06 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Days in the Sun (2012 Jan 21)
Replies: 16
Views: 2503

Re: APOD: Days in the Sun (2012 Jan 21)

I want to make a similar image from Latitude 31'04" Longitude 81'26". Can anyone give me details so I can make a beer can camera?
by John Carswell
Wed Dec 09, 2009 8:46 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: HUDF Infrared: Dawn of the Galaxies (2009 Dec 09)
Replies: 23
Views: 4864

Re: HUDF Infrared: Dawn of the Galaxies (2009 Dec 09)

Please forgive my ignorance. I have no education in astronomy. I just look at APOD with my first coffee and pipe every morning to keep a perspective on life. I have always wondered; If the light we see was emitted by these galaxies 15 billion years ago and the universe was smaller fifteen billion ye...
by John Carswell
Fri Sep 07, 2007 9:12 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: hubble
Replies: 65
Views: 14376

more hubble

Thanks for your reply but I am still confused. 12.7 billion years ago, when the light we see from the quasar was emitted, the universe was about 3 billion years old. Having expanded at something less than the speed of light, nothing was more than 3 billion light years distant from anything else. Why...
by John Carswell
Thu Sep 06, 2007 8:37 am
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: hubble
Replies: 65
Views: 14376

hubble

...please forgive a stupid question...I have no education. If the light left the quasar 12.7 billion years ago, when the quasar was 12.7 billion lightyears closer, then why doesn't the quasar appear to us as it would have 12.7 billion years ago...like really close and really big? Thank you for APOD....
by John Carswell
Mon Jan 15, 2007 10:02 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Comet McNaught viewing (APOD X Jan 2007)
Replies: 35
Views: 15289

McNaught

Would anyone have time and patience to explain to an uneducated amateur why the comet was visible at sunrise and sunset? I thought things had to be on one side of the sun or the other.
by John Carswell
Thu Mar 30, 2006 2:22 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: eclipse APOD 30 March 2006
Replies: 4
Views: 2684

I think I might have figured it out. The shadow would move east if the whole earth travels through the shadow faster than it's rotation carries any given place on its surface in the opposite direction. Also, the moon is moving so if the earth were stopped in it's orbital path and not rotating, the s...
by John Carswell
Thu Mar 30, 2006 12:15 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: eclipse APOD 30 March 2006
Replies: 4
Views: 2684

eclipse APOD 30 March 2006

I do not understand why the eclipse traveled from west to east. It seems that we should travel under the shadow as we ride the earth to the east. I am sorry to ask a stupid question, but I am old and not well educated.