Search found 13 matches

by ddale51
Thu Aug 11, 2016 6:57 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Perseid, Aurora, and Noctilucent Clouds (2016 Aug 11)
Replies: 6
Views: 2550

Re: APOD: Perseid, Aurora, and Noctilucent Clouds (2016 Aug 11)

This photo immediately reminded me of a very similar scene I created from a photo of a nearby lake, with a "bit" of digital enhancement. :ssmile: Art imitates ... well other art!
Twin trees in lake w comet.jpg
by ddale51
Mon Apr 29, 2013 4:32 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Milky Way and Stone Tree (2013 Apr 29)
Replies: 33
Views: 5604

Re: APOD: Milky Way and Stone Tree (2013 Apr 29)

Sirius doesn't belong there; it should be Vega, right? Unless there was some cosmic cataclysm I don't know about or people who decided that Pluto isn't a planet (which I agree with, btw) also decided to switch a few stars' names around, just for fun.
by ddale51
Sun Jan 13, 2013 6:10 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Ten Billion Earths (2013 Jan 12)
Replies: 40
Views: 6853

Re: APOD: Ten Billion Earths (2013 Jan 12)

Earth is a "Goldilocks" planet. Everything is just right. Just right air. Just right sun. Just right gas giant neighbors. Just right size moon. Just right rotation rate, axial tilt, composition, weather patterns. Just right, well, everything needed to support advanced life. There are nearl...
by ddale51
Mon Oct 22, 2012 5:42 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Space Shuttle on the Streets of LA (2012 Oct 22)
Replies: 25
Views: 4682

Re: APOD: A Space Shuttle on the Streets of... (2012 Oct 22)

@neufer :D :D :D ah, Hollywood. How would we ever learn our history without it? Where did Cleopatra's craftsmen build all those immense props? How did she get all her slaves and dancers all the way to Rome? When did they rehearse? How silly. But that was fun. What it has to do with a space shuttle I...
by ddale51
Sun Oct 14, 2012 7:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Hubble Extreme Deep Field (2012 Oct 14)
Replies: 62
Views: 12233

Re: APOD: The Hubble Extreme Deep Field (2012 Oct 14)

There is a much more informative picture of what they are really talking about...it is not so much the "foreground" galaxies...this page has a cut out view... You can't even see that spot in the magnified APOD view... http://www.news.com.au/technology/sci-tech/nasa-looks-132-billion-years...
by ddale51
Tue Jul 17, 2012 8:37 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Simulation: A Disk Galaxy Forms (2012 Jul 17)
Replies: 37
Views: 7886

Re: APOD: Simulation: A Disk Galaxy Forms (2012 Jul 17)

Wow. Fascinating stuff. It seems to me that I detect a bit of a bar that forms in the center of the later galaxy. It's not very prominent but it kind of shows how maybe the bar can form on a larger scale, something I've been puzzled about ever since I first saw the bars in photos of spiral galaxies ...
by ddale51
Sun Jun 24, 2012 3:40 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Venus Transits the Midnight Sun (2012 Jun 20)
Replies: 30
Views: 4189

Re: APOD: Venus Transits the Midnight Sun (2012 Jun 20)

Thanks Chris! I understand now. Your explanation was clear and helpful.
by ddale51
Fri Jun 22, 2012 9:13 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Venus Transits the Midnight Sun (2012 Jun 20)
Replies: 30
Views: 4189

Re: APOD: Venus Transits the Midnight Sun (2012 Jun 20)

Boy, am I confused. Apparently the position and direction of travel of Venus as it crosses the sun varies hugely depending on the location of the observer on Earth. This photo shows Venus traveling across the sun's face in a horizontal position from roughly 10 o'clock to 2 o'clock. But from where I ...
by ddale51
Sat Jun 11, 2011 5:34 pm
Forum: The Library: Information Desk and Educational Resources
Topic: Can we observe a galaxy rotating?
Replies: 2
Views: 1060

Can we observe a galaxy rotating?

I was looking at the recent, side-by-side APOD pictures of the M51 Spiral Galaxy that were taken six years apart, revealing two supernova explosions. Looking at the two, they of course looked identical except for the two supernovas. I began wondering: How long would it take to actually observe the r...
by ddale51
Sat Jun 11, 2011 7:12 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Supernovae in the Whirlpool (2011 Jun 11)
Replies: 16
Views: 3298

Re: APOD: Supernovae in the Whirlpool (2011 Jun 11)

Kaboom! I can only imagine what such a massive explosion does to the surrounding galaxy neighbors. I know stars are really far apart even in dense spiral arms, but some of those local stars must have taken a beating when that nova blew up. Does it blow away some of the stars' mass? Does it affect th...
by ddale51
Thu Apr 07, 2011 12:03 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: M74: The Perfect Spiral (2011 Apr 06)
Replies: 12
Views: 3374

Re: APOD: M74: The Perfect Spiral (2011 Apr 06)

I had no idea there were any galaxies that large relative to the size of the full moon. It's "bigger" than Andromeda, isn't it? Thanks for including the relative size information. As I've mentioned before, the relative size info on astronomical objects is greatly helpful and I would LOVE t...
by ddale51
Wed Mar 16, 2011 5:16 am
Forum: Starship Asterisk: Handbook
Topic: APOD Moon reference tool
Replies: 5
Views: 2706

Re: APOD Moon reference tool

I put up a post not long ago about this topic before I realized that this one existed. http://asterisk.apod.com/viewtopic.php?f=28&t=22756 The idea of the moon overlay option is one I highly desire to be incorporated in all celestial APOD photos. At least, dear APOD guys, please indicate in the ...
by ddale51
Thu Jan 27, 2011 6:55 pm
Forum: Starship Asterisk: Handbook
Topic: A sense of scale would be helpful
Replies: 1
Views: 775

A sense of scale would be helpful

I love the pictures of galaxies, nebula and other space vistas but I have a very hard time envisioning just how much of the sky the various objects cover. It helps when in the text it states that it's so many degrees in width as I know that there are two full moons for every degree of sky, but this ...