Search found 2955 matches

by johnnydeep
Tue Aug 11, 2020 3:20 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Churning Clouds on Jupiter (2020 Aug 11)
Replies: 17
Views: 4471

Re: APOD: Churning Clouds on Jupiter (2020 Aug 11)

<<Shiing-Shen Chern (October 28, 1911 – December 3, 2004) was a Chinese-American mathematician and poet. He made fundamental contributions to differential geometry and topology. He has been called the "father of modern differential geometry" and is widely regarded as a leader in geometry ...
by johnnydeep
Sun Aug 09, 2020 7:34 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Origin of Elements (2020 Aug 09)
Replies: 27
Views: 8448

Re: APOD: The Origin of Elements (2020 Aug 09)

The only colour that's not in the legend is dark brown ... what cosmic process is responsible for Tc, Po, At, etc.? I'm guessing none. I think these all have half lives that are too short for there to be any left over that have originate from cosmic processes. Anything naturally occurring now would...
by johnnydeep
Sat Aug 08, 2020 9:25 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Crescent Saturn (2020 Aug 08)
Replies: 13
Views: 6698

Re: APOD: Crescent Saturn (2020 Aug 08)

https://apod.nasa.gov/apod/calendar/S_200808.jpg Crescent Saturn Explanation: From Earth, Saturn never shows a crescent phase. But when viewed from a spacecraft the majestic giant planet can show just a sunlit slice. This image of crescent Saturn in natural color was taken by the robotic Cassini sp...
by johnnydeep
Sat Aug 08, 2020 9:21 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Crescent Saturn (2020 Aug 08)
Replies: 13
Views: 6698

Re: APOD: Crescent Saturn (2020 Aug 08)

WWW wrote: Sat Aug 08, 2020 5:45 pm It's deja vu all over again? https://apod.nasa.gov/apod/ap071023.html
Well, the image is the same, but the text is not.
by johnnydeep
Sat Aug 08, 2020 9:18 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Crescent Saturn (2020 Aug 08)
Replies: 13
Views: 6698

Re: APOD: Crescent Saturn (2020 Aug 08)

Grizzly wrote: Sat Aug 08, 2020 7:01 pm
APOD Robot wrote: Sat Aug 08, 2020 4:08 am From Earth, Saturn's disk is nearly full now
From Earth, isn't Saturn always a disk?
I think it's always at least gibbous, but not always completely full.
by johnnydeep
Thu Aug 06, 2020 7:13 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Messier 20 and 21 (2020 Aug 06)
Replies: 16
Views: 7950

Re: APOD: Messier 20 and 21 (2020 Aug 06)

Isn't Methuselah A supermassive star? Andyet it is very old! https://video.search.yahoo.com/yhs/search?fr=yhs-sz-001&hsimp=yhs-001&hspart=sz&p=star+older+than+the+universe%21#id=1&vid=100a52bcce613161331d0b6b1a155515&action=click Wikipedia says it's only .8 times the mass of the...
by johnnydeep
Tue Aug 04, 2020 4:11 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 2442: Galaxy in Volans (2020 Aug 04)
Replies: 19
Views: 11118

Re: APOD: NGC 2442: Galaxy in Volans (2020 Aug 04)

https://apod.nasa.gov/apod/calendar/S_200804.jpg NGC 2442: Galaxy in Volans Explanation: Distorted galaxy NGC 2442 can be found in the southern constellation of the flying fish , (Piscis) Volans . Located about 50 million light-years away, the galaxy's two spiral arms extending from a pronounced ce...
by johnnydeep
Sat Aug 01, 2020 3:00 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Elephant's Trunk Nebula in Cepheus (2020 Aug 01)
Replies: 8
Views: 6919

Re: APOD: The Elephant's Trunk Nebula in Cepheus (2020 Aug 01)

Great looking shot... amazing... but IF you look at the top trunk "differently"... you can see a female cosmic "fish-woman"... The elephant's "eye" ...is HER eye... a rather fishy eye...lower she has... Legs... :---[===] * Sorry, but I fail to see much of an elephant's...
by johnnydeep
Fri Jul 31, 2020 9:13 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mars 2020 from 5,000 Feet (2020 Jul 31)
Replies: 17
Views: 8444

Re: APOD: Mars 2020 from 5,000 Feet (2020 Jul 31)

I usually avoid saying how beautiful, wonderful an Apod is, but somehow this one does make me feel emotional. The slight curve of the smoke trail lifting into the darkening blue of the sky. As you may know, I'm not an American, but it made me think of the "The Star-Spangled Banner" and &q...
by johnnydeep
Thu Jul 30, 2020 3:49 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Red Planet Mars (2020 Jul 30)
Replies: 17
Views: 5173

Re: APOD: The Red Planet Mars (2020 Jul 30)

https://www.youtube.com/watch?v=fS7CcyMbGDc NASA Launches Perseverance Rover to Mars, Capping Summer of Missions to Red Planet By Kenneth Chang, nytimes, July 30, 2020 NASA’s Perseverance rover is headed to Mars, the third spacecraft to head that way this month. Perseverance, a robotic wheeled vehi...
by johnnydeep
Wed Jul 29, 2020 3:44 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 6188: The Dragons of Ara (2020 Jul 28)
Replies: 10
Views: 3487

Re: APOD: NGC 6188: The Dragons of Ara (2020 Jul 28)

Why is it that everything is space is more interesting the more you learn about it? From the link to HD 150136 within the wikipedia article article about NGC 6139, HD 150136 is listed in the Washington Double Star Catalog as having seven visual components within 30 arc seconds. Component A is a clo...
by johnnydeep
Tue Jul 28, 2020 6:34 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 6188: The Dragons of Ara (2020 Jul 28)
Replies: 10
Views: 3487

Re: APOD: NGC 6188: The Dragons of Ara (2020 Jul 28)

The main reason why I love NGC 6188, the nebula, is because of the ionizing cluster, NGC 6193. And the main reason why I love NGC 6193 is that this cluster contains the nearest magnificently hot and blue star of spectral class O3, HD 150136 . Read more here . <snip> Ann Why is it that everything is...
by johnnydeep
Mon Jul 27, 2020 3:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Comet and Lightning Beyond Bighorn... (2020 Jul 27)
Replies: 10
Views: 3385

Re: APOD: Comet and Lightning Beyond Bighorn... (2020 Jul 27)

CometLightning_Palmer_960.jpg Beautiful! Neowise on a long space journey, adeos untill we meet again in 6700 years! :mrgreen: And quite a collection of objects with disparate longevities in this image: lightning, clouds, grass, trees, comet, mountain, rock, stars (though likely many - most?/all? - ...
by johnnydeep
Mon Jul 27, 2020 3:46 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Flight through the Hubble Ultra... (2020 Jul 26)
Replies: 34
Views: 17487

Re: APOD: A Flight through the Hubble Ultra... (2020 Jul 26)

Ahead! Warp factor 9 gazillion, Mr. Sulu! The warp factor : 250,000 <<The warp drive velocity in Star Trek is generally expressed in "warp factor" units, which—according to Star Trek Star Fleet Technical Manual—corresponds to the magnitude of the warp field. Achieving warp factor 1 is equ...
by johnnydeep
Sun Jul 26, 2020 2:30 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Flight through the Hubble Ultra... (2020 Jul 26)
Replies: 34
Views: 17487

Re: APOD: A Flight through the Hubble Ultra... (2020 Jul 26)

orin stepanek wrote: Sun Jul 26, 2020 11:34 am I've often wondered what was at the end of the known universe! There can only be one answer;--more space! but what is there? :shock:✨
What’s at the end of the known universe you ask? Why, the unknown universe of course!
by johnnydeep
Sun Jul 26, 2020 2:26 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Flight through the Hubble Ultra... (2020 Jul 26)
Replies: 34
Views: 17487

Re: APOD: A Flight through the Hubble Ultra... (2020 Jul 26)

Tszabeau wrote: Sun Jul 26, 2020 12:17 pm “Nothing” is the biggest the biggest aspect of the multiverse... otherwise, we’d bump into everything.
Yeah. Space is the universe’s way of keeping everything from being in the same place. Just like time is the universe’s way of keeping everything from happening all at once. :ssmile:
by johnnydeep
Thu Jul 23, 2020 5:08 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Fairytale NEOWISE (2020 Jul 23)
Replies: 6
Views: 2934

Re: APOD: Fairytale NEOWISE (2020 Jul 23)

Who wrote that? What link to education was there? Of all the things in all the universe is this comet is now a fairy tale to obsessed over like a one hit wonder pop culture song? Over and over again. How about a nice pic of Io? Just roll with it for another few days. A comet like this is a once eve...
by johnnydeep
Tue Jul 21, 2020 6:01 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Iron in the Butterfly Nebula (2020 Jul 21)
Replies: 21
Views: 9791

Re: APOD: Iron in the Butterfly Nebula (2020 Jul 21)

Also, should I know who Judy Schmidt is? Yes. She is aka geckzilla, one of the simultaneously feared and revered moderators here, and the producer of many of the amazing astronomical images shown as APODs from her skilled work with Hubble Telescope data. Bruce, with a tip of my cap to her dragonshi...
by johnnydeep
Tue Jul 21, 2020 4:18 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Iron in the Butterfly Nebula (2020 Jul 21)
Replies: 21
Views: 9791

Re: APOD: Iron in the Butterfly Nebula (2020 Jul 21)

Explanation: NGC 6302 lies about 4,000 light-years away in the arachnologically [sic] correct constellation of the Scorpion ( Scorpius ). NGC 6302 lies about 4,000 light-years away in the arthropologically correct constellation of the Scorpion ( Scorpius ) Of all the foot joints , in all the phylum...
by johnnydeep
Sun Jul 19, 2020 7:36 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Rotating Moon from LRO (2020 Jul 19)
Replies: 19
Views: 5164

Re: APOD: Rotating Moon from LRO (2020 Jul 19)

Still nothing explicit there about just why the mares are on the near side. An "obvious" explanation I immediately thought of for why the mares are mostly on the near side is that the near side is simply heavier! That is, there are more heavy elements on or under the near side, with the r...
by johnnydeep
Sun Jul 19, 2020 7:31 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Rotating Moon from LRO (2020 Jul 19)
Replies: 19
Views: 5164

Re: APOD: Rotating Moon from LRO (2020 Jul 19)

BDanielMayfield wrote: Sun Jul 19, 2020 3:31 pm @ johnnydeep: See my comment immediately preceding yours.
I saw it. Humorous, yes, but not very scientifically satisfying :D
by johnnydeep
Sun Jul 19, 2020 3:22 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Rotating Moon from LRO (2020 Jul 19)
Replies: 19
Views: 5164

Re: APOD: Rotating Moon from LRO (2020 Jul 19)

Are there any good proposed explanations why these 'lava seas' are all on 'our' side of the Moon ? In the latest thinking, is this thought to be an artifact of the moons formation, or subsequent to that ? The dark and relatively featureless lunar plains, clearly seen with the naked eye, are called ...
by johnnydeep
Sat Jul 18, 2020 4:10 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Finding NEOWISE (2020 Jul 18)
Replies: 18
Views: 10580

Re: APOD: Finding NEOWISE (2020 Jul 18)

https://apod.nasa.gov/apod/calendar/S_200718.jpg Finding NEOWISE Explanation: If you can see the stars of the Big Dipper , you can find comet NEOWISE in your evening sky tonight. After sunset look for the naked-eye comet below the bowl of the famous celestial kitchen utensil of the north and above ...
by johnnydeep
Sat Jul 18, 2020 3:04 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Finding NEOWISE (2020 Jul 18)
Replies: 18
Views: 10580

Re: APOD: Finding NEOWISE (2020 Jul 18)

https://apod.nasa.gov/apod/calendar/S_200718.jpg Finding NEOWISE Explanation: If you can see the stars of the Big Dipper , you can find comet NEOWISE in your evening sky tonight. After sunset look for the naked-eye comet below the bowl of the famous celestial kitchen utensil of the north and above ...
by johnnydeep
Thu Jul 16, 2020 7:09 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Long Tails of Comet NEOWISE (2020 Jul 16)
Replies: 11
Views: 3114

Re: APOD: The Long Tails of Comet NEOWISE (2020 Jul 16)

<<By early July, Comet NEOWISE had brightened to magnitude −1, far exceeding the brightness attained by C/2020 F8 (SWAN), and had developed a second tail. The first tail is blue and made of gas and ions;. There is also a red separation in the tail caused by high amounts of sodium . The second tail ...