Search found 1564 matches

by JohnD
Sat Jan 01, 2022 4:56 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Full Moon of 2021 (2022 Jan 01)
Replies: 17
Views: 4092

Re: APOD: The Full Moon of 2021 (2022 Jan 01)

Oh, come on, Chris! You know how many objects are designated YTFJH L-54765 or something. The Moon is the Moon, Saturn is Saturn, but we don't use "Thin Saturn" or "Fat Saturn" as it displays its' rings at different angles. https://earthsky.org/upl/2018/05/Saturnoppositions.jpg Ve...
by JohnD
Sat Jan 01, 2022 1:15 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Full Moon of 2021 (2022 Jan 01)
Replies: 17
Views: 4092

Re: APOD: The Full Moon of 2021 (2022 Jan 01)

I usually think of La Nina as a southern Hemisphere phenomenon, so I am educated by referring to its effect on India. But when I looked it up, all the sites say that a strong La Nina means a cooler winter and MORE rainfall in India. That apart from the apparent diameter of the Moon, each full is ide...
by JohnD
Fri Dec 17, 2021 5:26 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Blue-Banded Blood Moon (2021 Dec 01)
Replies: 24
Views: 20812

Re: APOD: A Blue-Banded Blood Moon (2021 Dec 01)

Above we discussed the antiquity of astrologers' interest in "Blood-red moons", and biblical references. It goes even further back! I found by chance a BBC TV programme on YouTube, "The 2000 year old Computer", about the Antikythera Mechanism. That referred to the Seige of Syracu...
by JohnD
Thu Dec 16, 2021 9:09 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Blue-Banded Blood Moon (2021 Dec 01)
Replies: 24
Views: 20812

Re: APOD: A Blue-Banded Blood Moon (2021 Dec 01)

Poetry is not for understanding, it is for feeling. Science is the opposite. Just go with the flow, johnny! Just now in the UK we have a series on BBC TV, "Universe" where that Prodigy (actually he was in another group, D:Ream) Prof.Brian Cox takes us throught the wonders of said Universe...
by JohnD
Thu Dec 09, 2021 2:00 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Total Eclipse of the Sun (2021 Dec 09)
Replies: 11
Views: 3936

Re: APOD: A Total Eclipse of the Sun (2021 Dec 09)

Where does "just before the brief totality" stop and Bailey's Beads begin?
John
by JohnD
Mon Dec 06, 2021 7:35 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Space Station Silhouette on the Moon (2021 Dec 06)
Replies: 17
Views: 5965

Re: APOD: Space Station Silhouette on the Moon (2021 Dec 06)

If true, then Col.Harry is not the Grinch that our Chris is!

But the Director of Ops at Norad, taking telephone callsfrom the public? Come on, urban myth!
Unless the misprint was his red, hotline desk phone!

By the way, changed my avatar for Christmas. Whoop-de-doo.
by JohnD
Mon Dec 06, 2021 3:09 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Space Station Silhouette on the Moon (2021 Dec 06)
Replies: 17
Views: 5965

Re: APOD: Space Station Silhouette on the Moon (2021 Dec 06)

Oh, come on, Chris! It must be true, NORAD tracks him every Christmas!
And how do those presents arrive otherwise?

Don't listen, kids, that old killjoy will have you believe next that the Tooth Fairy is in league with Colgate!
by JohnD
Mon Dec 06, 2021 11:51 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Space Station Silhouette on the Moon (2021 Dec 06)
Replies: 17
Views: 5965

Re: APOD: Space Station Silhouette on the Moon (2021 Dec 06)

Four years ago, when Grandson No.1 was old enough to be shown a sky object and young enough not to be sceptical, we showed him the ISS flying overhead on Christmas Eve, as Santa's Sleigh. I hope that after my criticism of the use of "Blood Moon" I may be forgiven a harmless little fable in...
by JohnD
Thu Dec 02, 2021 8:03 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Blue-Banded Blood Moon (2021 Dec 01)
Replies: 24
Views: 20812

Re: APOD: A Blue-Banded Blood Moon (2021 Dec 01)

Poetry is not for understanding, it is for feeling. Science is the opposite. Just go with the flow, johnny! Just now in the UK we have a series on BBC TV, "Universe" where that Prodigy (actually he was in another group, D:Ream) Prof.Brian Cox takes us throught the wonders of said Universe....
by JohnD
Thu Dec 02, 2021 10:16 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Blue-Banded Blood Moon (2021 Dec 01)
Replies: 24
Views: 20812

Re: APOD: A Blue-Banded Blood Moon (2021 Dec 01)

Re John D. A blood moon was written about even earlier than Emily Dickinson or Shakespeare. Joel, Chapter 2 verse 31. The Sun shall be turned into darkness and the Moon into BLOOD, before the great and the terrible day of the Lord come. Thank you, De58te! But Shakespeare is my bible! I'm sure that ...
by JohnD
Wed Dec 01, 2021 7:17 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Blue-Banded Blood Moon (2021 Dec 01)
Replies: 24
Views: 20812

Re: APOD: A Blue-Banded Blood Moon (2021 Dec 01)

Oh, for goodness sake! May we - and this astronomy website - please stop using terms such as "Blood Moon". As shown, APoD is perfectly capable of describing the colours of an eclipsed Moon, without pandering to zombie and vampire fantasists. Nice pic, by the way! John I like the term. Not...
by JohnD
Wed Dec 01, 2021 12:34 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Blue-Banded Blood Moon (2021 Dec 01)
Replies: 24
Views: 20812

Re: APOD: A Blue-Banded Blood Moon (2021 Dec 01)

Oh, for goodness sake! May we - and this astronomy website - please stop using terms such as "Blood Moon".

As shown, APoD is perfectly capable of describing the colours of an eclipsed Moon, without pandering to zombie and vampire fantasists.

Nice pic, by the way!

John
by JohnD
Mon Nov 29, 2021 2:35 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Extraordinary Spiral in LL Pegasi (2021 Nov 29)
Replies: 26
Views: 9843

Re: APOD: The Extraordinary Spiral in LL Pegasi (2021 Nov 29)

Neufer's post above links to the ESO site where it says that, "Based on the expansion rate of the spiralling gas, astronomers estimate that a new “layer” appears every 800 years" A mis-description surely as the layers of the spiral are continuous, not from 800-year pulses? Do they mean, th...
by JohnD
Mon Nov 29, 2021 11:36 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Extraordinary Spiral in LL Pegasi (2021 Nov 29)
Replies: 26
Views: 9843

Re: APOD: The Extraordinary Spiral in LL Pegasi (2021 Nov 29)

"Relatively" to other stars, of course! Thank you Victor! Surely the distortion of the adjacent star is the usual diffraction spikes, like the one to left. Is there any additional "smearing". And which of those is the sidelighter? The right hand one looks as if it's a lot nearer ...
by JohnD
Mon Nov 29, 2021 10:46 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Extraordinary Spiral in LL Pegasi (2021 Nov 29)
Replies: 26
Views: 9843

Re: APOD: The Extraordinary Spiral in LL Pegasi (2021 Nov 29)

My first thought on seeing that image was - Einstein Ring!

Could a black hole be between that star and us, causing the strange spiral to appear, when the star behind is relatively normal?

JOhn
by JohnD
Fri Nov 26, 2021 1:30 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Great Refractor and Lunar Eclipse (2021 Nov 26)
Replies: 7
Views: 2531

Re: APOD: Great Refractor and Lunar Eclipse (2021 Nov 26)

I've always wondered how an astronomer can look through such a giant telescope, when their size means that the pivot (excuse my ignorant use of a simplistic term!) and so the eyepiece, must be so far from the ground. I had visions of a chair on the end of an articulated arm! But a recent "Sky a...
by JohnD
Thu Nov 25, 2021 11:52 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: At the Shadow's Edge (2021 Nov 25)
Replies: 21
Views: 7220

Re: APOD: At the Shadow's Edge (2021 Nov 25)

I submit, M'Luds (and M'Ladies), that the shadow, and hence the Earth, is RUGBY ball shaped, not the shape of an American football! The diference is in the pointy ends, an NFL ball is more sharply pointed, and the shadow is blunt. See: https://www.exploratorium.edu/sports/ask_us_sports_july.html Thi...
by JohnD
Thu Nov 25, 2021 9:29 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: At the Shadow's Edge (2021 Nov 25)
Replies: 21
Views: 7220

Re: APOD: At the Shadow's Edge (2021 Nov 25)

That composite gives an excellent mental image of the Earth's conic shadow!
by JohnD
Tue Oct 12, 2021 5:41 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Fireball over Lake Louise (2021 Oct 12)
Replies: 27
Views: 8641

Re: APOD: Fireball over Lake Louise (2021 Oct 12)

Have any guess where the meteorite has landed? 'An explosion in the sky': Golden, B.C., woman nearly hit by meteorite after it crashed through her ceiling https://bc.ctvnews.ca/an-explosion-in-the-sky-golden-b-c-woman-nearly-hit-by-meteorite-after-it-crashed-through-her-ceiling-1.5619818 quote the ...
by JohnD
Tue Oct 12, 2021 7:52 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Fireball over Lake Louise (2021 Oct 12)
Replies: 27
Views: 8641

Re: APOD: Fireball over Lake Louise (2021 Oct 12)

Ann,
I believe that a meteor big enough to go fireball will be at least one meter across. The Yucatan object was 10,000 to 15,000 meters wide. The Lake Louise object was therefore 5,000 to 15,000 times smaller. The dinosaurs could have continued to sleep easy. For then, anyway.
JOhn
by JohnD
Wed Oct 06, 2021 4:34 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Crescent Moon HDR (2020 Aug 24)
Replies: 14
Views: 5162

Re: APOD: Crescent Moon HDR (2020 Aug 24)

Strange, I've just had a one of the usual emails, notifying me that there has been a post on this thread, by one "marvini". But he ain't here! "The other day upon the stair I met a man who wasn't there. He wasn't there again today I wish, I wish he'd go away!" (William Hughes Mea...
by JohnD
Mon Oct 04, 2021 2:21 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 4676: When Mice Collide (2021 Oct 04)
Replies: 17
Views: 5241

Re: APOD: NGC 4676: When Mice Collide (2021 Oct 04)

That's NOW, Ann. What drew them together, when they started off on diverging trajectories, as in 'expanding'?
I call it careless driving, and someone should be prosecuted!
by JohnD
Mon Oct 04, 2021 11:59 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 4676: When Mice Collide (2021 Oct 04)
Replies: 17
Views: 5241

Re: APOD: NGC 4676: When Mice Collide (2021 Oct 04)

If there was a Big Bang, and the Universe has continued to expand ever since, why are any colliding?

That they do implies that someone is drunk in charge of a Galaxy!
JOhn
by JohnD
Sun Oct 03, 2021 10:56 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Holographic Principle and a Teapot (2021 Oct 03)
Replies: 38
Views: 10050

Re: APOD: The Holographic Principle and a Teapot (2021 Oct 03)

Like Russell, just on the assertion that there is something there, I'm not going to waste my time staring at a picture of semirandom dots in the hope that it will resolve into an image. Next!
John
by JohnD
Thu Sep 30, 2021 8:06 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Gigantic Jet Lightning from Puerto Rico (2021 Sep 29)
Replies: 13
Views: 3038

Re: APOD: Gigantic Jet Lightning from Puerto Rico (2021 Sep 29)

It would help, Sa Ji Tario, if you explained obscure words! A ceraunometer is an instrument used for counting the number of lightning discharges within a specific radius, says the Wiki. I think it works by receiving the radio noise from the flashes, not by ringing a bell. John PS, Neufer, that pictu...