Search found 2899 matches

by johnnydeep
Sun Apr 14, 2024 3:08 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: How a Total Solar Eclipse Ended (2024 Apr 14)
Replies: 12
Views: 950

Re: APOD: How a Total Solar Eclipse Ended (2024 Apr 14)

How does a total solar eclipse end? " This is the way a total eclipse ends Not with a whimper, but a FLASH-bang !" —— (with apologies to T. S. Eliot) From The Hollow Men" ( T. S. Eliot - 1925 ) This is the way the world ends This is the way the world ends This is the way the world en...
by johnnydeep
Sat Apr 13, 2024 9:39 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Palm Tree Partial Eclipse (2024 Apr 13)
Replies: 11
Views: 750

Re: APOD: Palm Tree Partial Eclipse (2024 Apr 13)

One of the links mentions that the length of totality varies - significantly - at different locations. Why is this? Complex orbital motions or something simpler? In April, totality will last longer than it did in 2017. Seven years ago, the longest period of totality was experienced near Carbondale,...
by johnnydeep
Sat Apr 13, 2024 6:54 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Palm Tree Partial Eclipse (2024 Apr 13)
Replies: 11
Views: 750

Re: APOD: Palm Tree Partial Eclipse (2024 Apr 13)

PNG is good for graphics and text images, because it is usually written in a lossless format (but it doesn't have to be... lossy PNG creates much smaller files, more similar to JPEG). So for screen captures, PNG is usually a better format unless you actively require a small file and can accommodate...
by johnnydeep
Sat Apr 13, 2024 6:17 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Palm Tree Partial Eclipse (2024 Apr 13)
Replies: 11
Views: 750

Re: APOD: Palm Tree Partial Eclipse (2024 Apr 13)

Hello! Today's APOD image is considerably larger in file size than it needs to be, as it's been saved using the PNG format. It should likely be using JPEG instead. I am referring to the image at this path: https://apod.nasa.gov/apod/image/2404/pinholepalm1024.png I have confirmed I can download the...
by johnnydeep
Sat Apr 13, 2024 4:00 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Palm Tree Partial Eclipse (2024 Apr 13)
Replies: 11
Views: 750

Re: APOD: Palm Tree Partial Eclipse (2024 Apr 13)

One of the links mentions that the length of totality varies - significantly - at different locations. Why is this? Complex orbital motions or something simpler? In April, totality will last longer than it did in 2017. Seven years ago, the longest period of totality was experienced near Carbondale, ...
by johnnydeep
Sat Apr 13, 2024 3:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Palm Tree Partial Eclipse (2024 Apr 13)
Replies: 11
Views: 750

Re: APOD: Palm Tree Partial Eclipse (2024 Apr 13)

Hello! Today's APOD image is considerably larger in file size than it needs to be, as it's been saved using the PNG format. It should likely be using JPEG instead. I am referring to the image at this path: https://apod.nasa.gov/apod/image/2404/pinholepalm1024.png I have confirmed I can download the...
by johnnydeep
Fri Apr 12, 2024 9:27 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Total Totality (2024 Apr 12)
Replies: 22
Views: 977

Re: APOD: Total Totality (2024 Apr 12)

There are 7 frames here, so that's 3 minutes. Totality at my location (near Evening Shade, Arkansas, 100 meters from the centerline) was 4:13. But totality had already started when I switched to the fast bracketed shots, so the first of it is missed here. The Moon was moving east, so lower right to...
by johnnydeep
Fri Apr 12, 2024 7:31 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Total Totality (2024 Apr 12)
Replies: 22
Views: 977

Re: APOD: Total Totality (2024 Apr 12)

This is kind of fun, an animated version of what we see in today's APOD. Frames are 30 seconds apart. (Might have to click on it to see the animation... depends on your browser.) _ prom_stack.gif Very nice. So, that would mean that the total time represented in the APOD is about 4.5 minutes, which ...
by johnnydeep
Fri Apr 12, 2024 6:41 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Total Totality (2024 Apr 12)
Replies: 22
Views: 977

Re: APOD: Total Totality (2024 Apr 12)

This is kind of fun, an animated version of what we see in today's APOD. Frames are 30 seconds apart. (Might have to click on it to see the animation... depends on your browser.) _ prom_stack.gif Very nice. So, that would mean that the total time represented in the APOD is about 4.5 minutes, which ...
by johnnydeep
Thu Apr 11, 2024 5:45 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Eclipse in Seven (2024 Apr 11)
Replies: 7
Views: 590

Re: APOD: Eclipse in Seven (2024 Apr 11)

What's the time separation of the photos here: 30 - 40 seconds or so? Also, there's the slightest hint of a pink prominence at 6 o'clock. Why can't we see more of it? I'd say 20 minutes between each image. The prominences are washed out by the corona close to the Sun. To capture both them and the c...
by johnnydeep
Thu Apr 11, 2024 4:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Planets Around a Total Eclipse (2024 Apr 10)
Replies: 12
Views: 794

Re: APOD: Planets Around a Total Eclipse (2024 Apr 10)

I disagree. I've seen a number of eclipses, and while images can't capture the overall ambience and awe that go with that experience, they blow away the human eye and brain for capturing detail and dynamic range. A good camera, good optics, and good processing far, far exceed what our senses are ca...
by johnnydeep
Thu Apr 11, 2024 4:58 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Moon's Shadow over Lake Magog (2024 Apr 09)
Replies: 13
Views: 1066

Re: APOD: Moon's Shadow over Lake Magog (2024 Apr 09)

Lake Magog, Quebec The picture was actually taken in the town of Magog, QC, on the shore of Lake Memphemagog. Lake Magog is another lake slightly east of Magog. This was Stan's mistake. He acknowledged my correction below my comment of this picture on his Instragram page. Thanks for the correction....
by johnnydeep
Thu Apr 11, 2024 4:32 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Eclipse in Seven (2024 Apr 11)
Replies: 7
Views: 590

Re: APOD: Eclipse in Seven (2024 Apr 11)

What's the time separation of the photos here: 30 - 40 seconds or so? Also, there's the slightest hint of a pink prominence at 6 o'clock. Why can't we see more of it?
by johnnydeep
Thu Apr 11, 2024 4:19 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Planets Around a Total Eclipse (2024 Apr 10)
Replies: 12
Views: 794

Re: APOD: Planets Around a Total Eclipse (2024 Apr 10)

This conversation about digital processing and imagery differences shrinking or enlarging high contrast components of an image brings to mind my experience of the eclipse only a few miles away from where this photo was taken. The eye, occipital lobe visual processing part of the brain and other pro...
by johnnydeep
Wed Apr 10, 2024 4:00 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)
Replies: 11
Views: 886

Re: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)

I made a pinhole camera for the 1963 partial eclipse, and while it was a once-removed viewing, it was still fun. But, my friend and I also decided on something else concurrently (and against my father's orders): we held a candle up to a broken piece of glass, and for so long that it became too blac...
by johnnydeep
Wed Apr 10, 2024 3:57 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)
Replies: 11
Views: 886

Re: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)

I made a pinhole camera for the 1963 partial eclipse, and while it was a once-removed viewing, it was still fun. But, my friend and I also decided on something else concurrently (and against my father's orders): we held a candle up to a broken piece of glass, and for so long that it became too blac...
by johnnydeep
Wed Apr 10, 2024 2:03 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: CMB Dipole: Speeding Through the... (2022 Apr 03)
Replies: 64
Views: 28648

Re: APOD: CMB Dipole: Speeding Through the... (2022 Apr 03)

Consensus is one of the most important parts of the scientific method. It means nearly all cosmologists agree on the general origin of the CMB. Which means nearly everyone else should agree, as well. Because experts are experts, and most others are not. If you're not an expert, you're not qualified...
by johnnydeep
Wed Apr 10, 2024 1:42 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: CMB Dipole: Speeding Through the... (2022 Apr 03)
Replies: 64
Views: 28648

Re: APOD: CMB Dipole: Speeding Through the... (2022 Apr 03)

It is hardly a guess. It is scientific consensus, and therefore what most people should consider the likely answer. What does " scientific consensus " mean? The universe was thought to be 13 billion years old based on the dubious quality of the General Theory of Relativity equations. Igno...
by johnnydeep
Tue Apr 09, 2024 6:01 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Moon's Shadow over Lake Magog (2024 Apr 09)
Replies: 13
Views: 1066

Re: APOD: Moon's Shadow over Lake Magog (2024 Apr 09)

Couldn't understand one basic aspect. Why the eclipse is seen starting from west coast in US to east coast in US.. Apparent motion of moon from east to waste should be faster than Sun's apparent motion from east to west.. So I was imagining it'd start from east coast and move towards west coast. An...
by johnnydeep
Tue Apr 09, 2024 4:10 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Moon's Shadow over Lake Magog (2024 Apr 09)
Replies: 13
Views: 1066

Re: APOD: Moon's Shadow over Lake Magog (2024 Apr 09)

For reference, here is the location of Lake Magog, Quebec and the eclipse path. It's the little lake just slightly South-West of Sherbrooke, at the point of the green arrow:

lake megog quebec map and eclipse 2024 path.jpg
by johnnydeep
Sun Apr 07, 2024 8:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)
Replies: 11
Views: 886

Re: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)

So, I'm too late to get either solar glasses or other eclipse viewing paraphernalia (I'm only in a 95% totality band anyway), but if I was interested in getting something to use with binoculars in the future, what's the best choice? I know there are specialty "solar-only" binoculars with ...
by johnnydeep
Sun Apr 07, 2024 8:58 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)
Replies: 11
Views: 886

Re: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)

So, I'm too late to get either solar glasses or other eclipse viewing paraphernalia (I'm only in a 95% totality band anyway), but if I was interested in getting something to use with binoculars in the future, what's the best choice? I know there are specialty "solar-only" binoculars with ...
by johnnydeep
Sun Apr 07, 2024 8:56 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)
Replies: 11
Views: 886

Re: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)

Badbubble wrote: Sun Apr 07, 2024 7:55 pm Jonhnnydeep,

Don't give up on getting solar glasses yet. I have been told that some convenience stores and libraries have them. Your favorite astronomy club may be able to help you get them.
True. Thanks for the reminder!
by johnnydeep
Sun Apr 07, 2024 3:54 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)
Replies: 11
Views: 886

Re: APOD: A Total Solar Eclipse over Wyoming (2024 Apr 07)

So, I'm too late to get either solar glasses or other eclipse viewing paraphernalia (I'm only in a 95% totality band anyway), but if I was interested in getting something to use with binoculars in the future, what's the best choice? I know there are specialty "solar-only" binoculars with b...
by johnnydeep
Sat Apr 06, 2024 5:54 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Unwinding M51 (2024 Apr 06)
Replies: 11
Views: 593

Re: APOD: Unwinding M51 (2024 Apr 06)

Now that i look closer at the unwound image, it DOES show something better that i have always thought unexplained. The spiral arm that passes to NGC5195 is clearly bent towards it, and the fatter spiral arm next down is clearly bent away from it. Some sort of large scale dynamics at work here. The ...