Search found 2484 matches

by rstevenson
Thu Jan 06, 2022 4:17 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Last Days of Venus as the Star... (2022 Jan 06)
Replies: 16
Views: 4848

Re: APOD: The Last Days of Venus as the Star... (2022 Jan 06)

"about 2 percent illuminated by sunlight" sounds somewhat strange to me - it is 100% illuminated by sunlight!! I presume you mean that about 2% of the sunlight that hits it is reflected... :) I’ve always taken that sort of statement as meaning that 2% of the disk of Venus is reflecting su...
by rstevenson
Thu Jan 06, 2022 3:17 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Last Days of Venus as the Star... (2022 Jan 06)
Replies: 16
Views: 4848

Re: APOD: The Last Days of Venus as the Star... (2022 Jan 06)

"about 2 percent illuminated by sunlight" sounds somewhat strange to me - it is 100% illuminated by sunlight!! I presume you mean that about 2% of the sunlight that hits it is reflected... :) I’ve always taken that sort of statement as meaning that 2% of the disk of Venus is reflecting su...
by rstevenson
Tue Jan 04, 2022 12:29 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Moons Beyond Rings at Saturn (2022 Jan 04)
Replies: 10
Views: 3816

Re: APOD: Moons Beyond Rings at Saturn (2022 Jan 04)

I can't imagine any human will EVER visit Saturn, or even Jupiter for that matter - radiation and particles are killers, and what would humans do there anyway? I can't imagine any human will EVER… cross the ocean, explore the Arctic, work in Antarctica, travel into space, visit the Moon, … . But we...
by rstevenson
Sun Dec 26, 2021 11:38 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: James Webb Space Telescope over Earth (2021 Dec 26)
Replies: 47
Views: 14028

Re: APOD: James Webb Space Telescope over Earth (2021 Dec 26)

johnlcarswell@bellsouth.net wrote: Sun Dec 26, 2021 8:52 am Where was the camera that took photo taken?
It was on the upper stage of the rocket. A lot of people asking the same question wherever this pic appears.

Rob
by rstevenson
Sat Nov 13, 2021 3:20 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Is dark matter the cousin of cosmic dust twice removed???
Replies: 9
Views: 3940

Re: Is dark matter the cousin of cosmic dust twice removed???

Yes, is dark matter the cousin of cosmic dust twice removed and just a bit smoothed? Ladies and gentlemen, let me present the evidence: Can't the relationship between dark matter and cosmic dust be (a bit) like a Mandelbrot fractal set where everything repeats at smaller and smaller (or larger and ...
by rstevenson
Sat Nov 13, 2021 12:55 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Is dark matter the cousin of cosmic dust twice removed???
Replies: 9
Views: 3940

Re: Is dark matter the cousin of cosmic dust twice removed???

Yes, is dark matter the cousin of cosmic dust twice removed and just a bit smoothed? Ladies and gentlemen, let me present the evidence: https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2007/01/3d_distribution_of_dark_matter_in_the_universe/9773330-3-eng-GB/3D_distribution_of_dark_ma...
by rstevenson
Sat Nov 13, 2021 12:50 pm
Forum: Open Space: Discuss Anything
Topic: Favorite Moons
Replies: 13
Views: 26453

Re: Favorite Moons

I’d have to visit them all in person to really make up my mind. I wonder if Elon wants another project?

Rob
by rstevenson
Sat Nov 13, 2021 12:47 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Would you go?
Replies: 4
Views: 4069

Re: Would you go?

Lacking the science degrees or the experience of flying very fast while shooting at other humans, I certainly wouldn’t be chosen for such a trip. But yes, I’d love to go. Maybe they’ll finally realize that using highly paid scientists and pilots to clean floors and toilets is not a good idea and the...
by rstevenson
Mon Aug 02, 2021 12:50 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Hubble Ultra Deep Field in Light... (2021 Aug 02)
Replies: 40
Views: 20650

Re: APOD: The Hubble Ultra Deep Field in Light... (2021 Aug 02)

brf wrote: Mon Aug 02, 2021 11:56 am For all the moaning and complaining in the comments, I think this is a really neat idea !!
I don't see any moaning and complaining, just people who are very interested in this sort of thing talking to each other about it. And yes, it is a really neat idea.

Rob
by rstevenson
Mon Aug 02, 2021 10:56 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Hubble Ultra Deep Field in Light... (2021 Aug 02)
Replies: 40
Views: 20650

Re: APOD: The Hubble Ultra Deep Field in Light... (2021 Aug 02)

I see the note that says “Sounds will only play on some browsers.” I can’t hear the sounds on my 2020 iPad, which is odd. Why odd? Because there've been over half a billion iPads sold since they were introduced 11 years ago, and WebKit, the browser engine which runs the Safari browser (as well as Ch...
by rstevenson
Fri Jul 30, 2021 2:01 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mimas in Saturnlight (2021 Jul 30)
Replies: 13
Views: 4191

Re: APOD: Mimas in Saturnlight (2021 Jul 30)

... I take it is lit by reflected light off of Saturn! Second hand light! :mrgreen: Yes. The description says "An enhanced version better reveals the ... moon lit by sunlight reflected from Saturn itself." (I deconvoluted the sentence structure.) Rob (who enjoys deconvoluting the writing ...
by rstevenson
Fri Jul 30, 2021 1:58 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mimas in Saturnlight (2021 Jul 30)
Replies: 13
Views: 4191

Re: APOD: Mimas in Saturnlight (2021 Jul 30)

cursor doesn't work. just a mini view o display, doesn't rotate. The moon won't rotate when you click and drag your cursor. It's not supposed to. Sliding your cursor over the image will show the enhanced Saturn-lit view (in a well behaved browser); without the cursor over the image you see the unen...
by rstevenson
Mon Jul 26, 2021 10:37 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: CG4: A Ruptured Cometary Globule (2021 Jul 26)
Replies: 18
Views: 4709

Re: APOD: CG4: A Ruptured Cometary Globule (2021 Jul 26)

I am curious why so much of the text of today’s APOD comes from this page…
http://annesastronomynews.com/annes-pic ... obule-cg4/

Attribution is a good thing, even if the originator volunteers the text for APOD’s use.

Rob
by rstevenson
Tue Jun 29, 2021 3:40 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Orion Nebula: The Hubble View (2021 Jun 29)
Replies: 19
Views: 10279

Re: APOD: Orion Nebula: The Hubble View (2021 Jun 29)

The processing required is simple and could easily be done via browser scripting, even on some weak little Chromebook. There are browser-based image processing tools that do much more sophisticated tasks. There is a famous online tool (which shall remain nameless), used within a browser to design o...
by rstevenson
Tue Jun 29, 2021 9:27 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Orion Nebula: The Hubble View (2021 Jun 29)
Replies: 19
Views: 10279

Re: APOD: Orion Nebula: The Hubble View (2021 Jun 29)

I wish there were internet page-friendly interactive tools like zoom and panning in the band of wavelengths. Rendering in RGB a wavelength window in a range of several monochrome images, mapping the longest wavelength monochrome image to RGB red, the shortest one to RGB blue and spreading each of t...
by rstevenson
Tue May 11, 2021 6:36 pm
Forum: Open Space: Discuss Anything
Topic: Covid-19
Replies: 57
Views: 30524

Re: Covid-19

I hadn't realized that about polio. As you say, it has a place in our minds as a terrible disease from the past. (I may have had it, according to my mother. She recalls our GP saying about me "if he recovers, we won't know if he had it." Imagine a parent hearing that! I recovered after 6 w...
by rstevenson
Tue May 11, 2021 6:17 pm
Forum: Open Space: Discuss Anything
Topic: Covid-19
Replies: 57
Views: 30524

Re: Covid-19

Thanks for the quick response, Chris. I needed to hear from sensible people here simply because I'm spending way too much time reading and being upset by the never ending stream of ill-informed argument in other forums. The Asterisk is a refreshing change of pace. I hope all who inhabit this quiet c...
by rstevenson
Tue May 11, 2021 4:45 pm
Forum: Open Space: Discuss Anything
Topic: Covid-19
Replies: 57
Views: 30524

Re: Covid-19

… [re Covid] It is worth keeping in mind, however, that it is only the leading cause of death when categorized and viewed on a daily basis. On any given day, you're still more likely to die of something other than COVID-19. And this is a short term situation (unlike most of the other common causes ...
by rstevenson
Wed Apr 28, 2021 9:57 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: North Star: Polaris and Surrounding Dust (2021 Apr 28)
Replies: 21
Views: 14289

Re: APOD: North Star: Polaris and Surrounding Dust (2021 Apr 28)

alter-ego wrote: Wed Apr 28, 2021 4:17 am IFN → Integrated Flux Nebula
They’re just checking that we actually read what they write. Yeah, that’s it!

Rob
by rstevenson
Thu Mar 18, 2021 7:37 pm
Forum: Open Space: Discuss Anything
Topic: Happy Pi Day
Replies: 16
Views: 7181

Re: Happy Pi Day

The pies have it!
by rstevenson
Tue Mar 02, 2021 5:41 pm
Forum: Open Space: Discuss Anything
Topic: Num num num
Replies: 267
Views: 55609

Re: Num num num

Rob, why don't you check out the Youtube channel called Glen and friends cooking ? Glen is a really nice person, and it's fun to see him cook. Plus, he's Canadian. Here is a video of him making donuts: https://www.youtube.com/watch?v=5RFsfTOvgAc Thanks Ann. I’ve seen a few of his videos on YouTube ...
by rstevenson
Tue Mar 02, 2021 4:16 pm
Forum: Open Space: Discuss Anything
Topic: Num num num
Replies: 267
Views: 55609

Re: Num num num

... So they're putting in the biggest, fanciest automatic donut machine money can buy. In fact, it is so big that they had to install it first and then build the building around it, as there would be no way to get it inside once the structure was complete. I don’t suppose you have a link to a local...
by rstevenson
Tue Mar 02, 2021 3:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Ingenuity: A Mini-Helicopter Now on Mars (2021 Mar 02)
Replies: 35
Views: 17396

Re: APOD: Ingenuity: A Mini-Helicopter Now on Mars (2021 Mar 02)

You piqued my curiosity (or perseverance!), so I went there (https://www.facebook.com/AstronomyPictureOfTheDay). It's really not so bad - I've seen much worse. I’ve seen much worse — MUCH worse — elsewhere on FB, but it always distresses me when this sort of egregious nastiness breaks out on APOD o...
by rstevenson
Tue Mar 02, 2021 11:37 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Ingenuity: A Mini-Helicopter Now on Mars (2021 Mar 02)
Replies: 35
Views: 17396

Re: APOD: Ingenuity: A Mini-Helicopter Now on Mars (2021 Mar 02)

Whatever you do, don’t go to Facebook to read the comments there on today’s APOD. I fear for the future of the human race.

Rob
by rstevenson
Tue Mar 02, 2021 11:21 am
Forum: Open Space: Discuss Anything
Topic: Num num num
Replies: 267
Views: 55609

Re: Num num num

... So they're putting in the biggest, fanciest automatic donut machine money can buy. In fact, it is so big that they had to install it first and then build the building around it, as there would be no way to get it inside once the structure was complete. I don’t suppose you have a link to a local...