ok, I apply saturation -50/100 (after moonification)
Search found 1063 matches
- Tue Dec 12, 2023 2:51 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
- Replies: 24
- Views: 54210
- Tue Dec 12, 2023 1:25 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
- Replies: 24
- Views: 54210
Re: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
Here is my attempt to photoshop this APOD into a day-feeling scene: https://asterisk.apod.com/download/file.php?id=48933&t=1 All it took was to apply gamma=2 to the green channel and gamma=3 to the blue one I still think that looks like a night scene. The reason is that the colors are so washed...
- Tue Dec 12, 2023 7:24 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Aurora and Milky Way over Norway (2023 Dec 12)
- Replies: 3
- Views: 4498
Re: APOD: Aurora and Milky Way over Norway (2023 Dec 12)
it would take a logarithmic scale to map the distances of every labelled thing in this APOD. The same goes for their lifetimes; those are like this: Aurora < Norwegian Sea < Big Dipper Stars < Mars, Pleiades, Milky Way, Andromeda 100 microyears < 10 megayears < 1 gigayear < 10 gigayears
- Tue Dec 12, 2023 5:35 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
- Replies: 24
- Views: 54210
- Mon Dec 11, 2023 2:39 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
- Replies: 24
- Views: 54210
Re: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
let me try it the other way round, to photoshop a daytime scene
into a nightish-feeling one
into a nightish-feeling one
- Mon Dec 11, 2023 1:07 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solar Minimum versus Solar Maximum (2023 Dec 11)
- Replies: 13
- Views: 7466
Re: APOD: Solar Minimum versus Solar Maximum (2023 Dec 11)
The Sun may be undergoing minimums and maximums (which is caused by its magnetism), but it still darn quiet for a star of its class! https://www.syfy.com/sites/syfy/files/styles/scale_600/public/sun_brightness_vs_star.jpg Ann what are the "365 solar-type stars"? Are they the same mass and...
- Mon Dec 11, 2023 12:57 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
- Replies: 24
- Views: 54210
Re: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
offtopic about colourful scenes at night I challenge everybody to solve this mystery. If you zoom in this APOD and see just the bridge, the water and the trees, why do you still feel that it is night? It has to do with the quality of the light. Is the light "evenly distributed", as it is ...
- Mon Dec 11, 2023 6:38 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solar Minimum versus Solar Maximum (2023 Dec 11)
- Replies: 13
- Views: 7466
Re: APOD: Solar Minimum versus Solar Maximum (2023 Dec 11)
The Sun may be undergoing minimums and maximums (which is caused by its magnetism), but it still darn quiet for a star of its class! https://www.syfy.com/sites/syfy/files/styles/scale_600/public/sun_brightness_vs_star.jpg Phil Plait of SYFY wrote: Astronomers have determined that, on average, the S...
- Mon Dec 11, 2023 5:50 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
- Replies: 24
- Views: 54210
Re: APOD: Big Dipper over Pyramid Mountain (2023 Dec 10)
offtopic about colourful scenes at night
I challenge everybody to solve this mystery.
If you zoom in this APOD and see just the bridge, the water and the trees, why do you still feel that it is night?
I challenge everybody to solve this mystery.
If you zoom in this APOD and see just the bridge, the water and the trees, why do you still feel that it is night?
- Mon Dec 11, 2023 5:01 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
- Replies: 49
- Views: 132629
Re: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
I hope when they make the 3d map of all the Euclids's galaxies up to redshift of 2,
they present it in an online 3d model, able to wobble slightly at user's command.
I don't mean a side view of a galaxy made up by some AI. I mean a little wobble to let the user feel the depth
they present it in an online 3d model, able to wobble slightly at user's command.
I don't mean a side view of a galaxy made up by some AI. I mean a little wobble to let the user feel the depth
- Sun Dec 10, 2023 10:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
- Replies: 49
- Views: 132629
Re: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
that is a good news. Of course it depends on how correct we model the forming of rogue asteroids and Oort clouds. We can't see or radar them now and they can be more numerous for all we know. Or can we see them after all, not in their star's light, but in the stellar wind of a Nova or Supernova? he...
- Sat Dec 09, 2023 9:57 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
- Replies: 49
- Views: 132629
Re: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
Exactly. The total mass of the Oort cloud is probably on the order of a few Earths, which is distributed over a massive volume. We could probably sail a probe around in the Oort cloud for thousands of years and never come close enough to a body to detect it. Two Oort clouds passing through each oth...
- Sat Dec 09, 2023 8:54 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Andromeda over the Alps (2023 Nov 13)
- Replies: 21
- Views: 34449
Re: APOD: Andromeda over the Alps (2023 Nov 13)
From over 2 million years ago. What we "see" is what light shows us and light emitted from stars/planets/life on planets in same galaxy is all same. It takes 2+ millions years for light to reach us from there. So, no one knows what happened later (during those 2+ million years when light ...
- Sat Dec 09, 2023 8:49 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Plane Crossing Crescent Moon (2023 Dec 04)
- Replies: 18
- Views: 11924
Re: APOD: Plane Crossing Crescent Moon (2023 Dec 04)
More like this https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRC5aOrphDcGCszC7sdRo3fl6sQDq7cG8AK2cQDcWfdCj_6G-4AYNb9C-G_JeTK951F5Mc&usqp=CAU The disk of the moon when low above the horizon should be red. Like when it's a narrow crescent close to the disk of the sun and the sun is low abo...
- Thu Dec 07, 2023 12:06 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Plane Crossing Crescent Moon (2023 Dec 04)
- Replies: 18
- Views: 11924
Re: APOD: Plane Crossing Crescent Moon (2023 Dec 04)
More like this https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRC5aOrphDcGCszC7sdRo3fl6sQDq7cG8AK2cQDcWfdCj_6G-4AYNb9C-G_JeTK951F5Mc&usqp=CAU The disk of the moon when low above the horizon should be red. Like when it's a narrow crescent close to the disk of the sun and the sun is low abo...
- Tue Dec 05, 2023 11:44 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Energetic Particle Strikes the Earth (2023 Dec 05)
- Replies: 16
- Views: 8659
Re: APOD: Energetic Particle Strikes the Earth (2023 Dec 05)
Do we know for certain that this was indeed a single high energy particle ? And not a whole 'cohort' of particles - arriving together ?? Indeed, Photographing such an event is going to present some challenges This should snapshot individual high energy particles creating a shower in the atmosphere
- Mon Nov 13, 2023 5:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Andromeda over the Alps (2023 Nov 13)
- Replies: 21
- Views: 34449
Re: APOD: Andromeda over the Alps (2023 Nov 13)
IF we had a telescope that was powerful enough to see all the way into the Andromeda galaxy, and powerful enough to zoom into a planet that harbored some type of life, would we be seeing images from 2 million years ago or current? From over 2 million years ago. What we "see" is what light...
- Mon Nov 13, 2023 5:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
- Replies: 49
- Views: 132629
Re: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
Wikipedia says our own Oort cloud extends to "distances ranging from 2,000 to 200,000 AU (0.03 to 3.2 light-years)". If another star with a similar Oort cloud passes with, say, 1 ly, the two Oort clouds would pass through each other. So, you're saying that although the gravity of the pass...
- Sun Nov 12, 2023 8:28 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
- Replies: 49
- Views: 132629
Re: APOD: Perseus Galaxy Cluster from Euclid (2023 Nov 08)
Here is a simulation of a major merger resulting in the formation of a large elliptical galaxy. Stars are shown in the left, gas temperature at the right. https://www.illustris-project.org/movies/illustris_movie_elliptical_formation_1pMpc.mp4 Certainly from the perspective of an individual star and...
- Tue Nov 07, 2023 10:28 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Dinkinesh Moonrise (2023 Nov 04)
- Replies: 16
- Views: 18521
Re: APOD: Dinkinesh Moonrise (2023 Nov 04)
There is no evidence of "exploded planets" in the Solar System (and no physics to explain such a thing). Asteroids are remnants of material that failed (probably due to gravitational resonance zones created by the gas giants) to coalesce into planets. The total mass of all the asteroids i...
- Wed Oct 25, 2023 12:18 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Io from Spacecraft Juno (2023 Oct 23)
- Replies: 17
- Views: 24226
Re: APOD: Moon Io from Spacecraft Juno (2023 Oct 23)
to judge the colour, we can take this pic https://upload.wikimedia.org/wikipedia/commons/5/5c/PIA25726-Jupiter%2BMoonIo-Juno-20230731.jpg and try saturation slider like this Io Saturation+30.jpg there seem to be some pinkish regions and some greenish regions and that can be thought as a struggle of ...
- Sun Oct 15, 2023 4:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: An Eclipse Tree (2023 Oct 15)
- Replies: 9
- Views: 12252
Re: APOD: An Eclipse Tree (2023 Oct 15)
…I used to be taken driving and notice the speckled shadows moving across the carriage, before it occurred to me that they were caused by the leaves overhead. (As soon as I discovered this, the scientific interest killed the impression, and I began speculating as to why the patches of light were alwa...
- Sun Sep 17, 2023 6:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
- Replies: 16
- Views: 2822
Re: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
please which side is the one side?Sa Ji Tario wrote: ↑Sun Sep 17, 2023 3:05 pm On one side of the lunar limb are the DÁlambert Mountains that look like saw teeth and through whose ravines and valleys sunlight filters to form the Baily Beads.
- Thu Sep 14, 2023 5:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 7331 and Beyond (2023 Sep 14)
- Replies: 21
- Views: 3919
Re: APOD: NGC 7331 and Beyond (2023 Sep 14)
is it me or the core is quite spherical?
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- Sun Sep 03, 2023 6:38 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 7023: The Iris Nebula (2023 Sep 02)
- Replies: 60
- Views: 16498
Re: APOD: NGC 7023: The Iris Nebula (2023 Sep 02)
do I get it right: this is a dust cloud dimly backlighted by many distant stars, as can be seen at the edges of this APOD frame (and showing dark gray with a brown tint) brightly backlighted by a single star closely behind the dust cloud (in pale cyan to blue to deep violet as the angle of scatterin...