Search found 215 matches
- Sun Aug 07, 2022 7:57 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Stereo Phobos (2022 Aug 06)
- Replies: 24
- Views: 6824
Re: APOD: Stereo Phobos (2022 Aug 06)
I wonder why Nasa doesn;t use the same technology as Facebook to produce stereo or 3-D pictures. How many people have an old set of red and blue paper spectacles lying around? I don't know what FB does, but here's a de-anaglyphed version suitable for cross-eyed viewing. _ de-anaglyph-Phobos_stereoM...
- Sun Aug 07, 2022 7:54 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Meteor before Galaxy (2022 Aug 07)
- Replies: 15
- Views: 3739
Re: APOD: Meteor before Galaxy (2022 Aug 07)
Just a stunning image…
Space cat approves!
Eric
Space cat approves!
Eric
- Tue Aug 02, 2022 7:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Moon Dressed Like Saturn (2022 Aug 02)
- Replies: 14
- Views: 3791
Re: APOD: A Moon Dressed Like Saturn (2022 Aug 02)
Am I misinterpreting something in the caption? It seems to be saying that, since the Moon is illuminated from the bottom, the Sun is below the horizon so the picture was taken before sunrise. Could not the picture have been taken after sunset? Six months earlier?? You are correct, it was just left ...
- Tue Aug 02, 2022 7:36 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Moon Dressed Like Saturn (2022 Aug 02)
- Replies: 14
- Views: 3791
Re: APOD: A Moon Dressed Like Saturn (2022 Aug 02)
I wonder how come that stars are smeared like in a long exposure, Moon is crisp and lights from small Guatemalan towns are crisp. The three must move differentially, must they not? Or is Moon in fact smeared? If the moon was being tracked by the camera and the exposure was long enough then that wou...
- Mon Jul 25, 2022 8:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Saturn in Infrared from Cassini (2022 Jul 24)
- Replies: 7
- Views: 2856
Re: APOD: Saturn in Infrared from Cassini (2022 Jul 24)
I tried and failed to google the colour coding :( There's a description in the infrared link in the APOD explanation. But even that is confusing because they show two examples of the dog in infrared. The first one we are mostly familiar with from Flir cameras. The hottest light is the bright yellow...
- Mon Jul 25, 2022 8:28 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Find the New Moon (2022 Jul 25)
- Replies: 29
- Views: 10689
Re: APOD: Find the New Moon (2022 Jul 25)
An example of why we often use pseudocolor palettes when trying to get more out of an image. I've converted the original to grayscale and then applied a common pseudocolor mapping used for astronomical images. It results in an image that lets our eyes see more detail than would otherwise be apparen...
- Tue Jul 19, 2022 4:49 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Pleiades over Half Dome (2022 Jul 19)
- Replies: 5
- Views: 2265
Re: APOD: Pleiades over Half Dome (2022 Jul 19)
I think Mr. Adams would appreciate today’s APOD image!
Eric
Eric
- Wed Jul 13, 2022 2:57 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Noctilucent Clouds over Paris (2022 Jul 12)
- Replies: 6
- Views: 1926
Re: APOD: Noctilucent Clouds over Paris (2022 Jul 12)
I'm always envious of people who manage to see, and take pictures of, such vividly blue noctilucent clouds. They have never looked so blue when I have seen them. Don't feel bad. It's because they are not vividly blue to the eye. Rather like blue stars, visually they are bluish white. It takes an im...
- Mon Jul 11, 2022 6:58 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Andromeda over the Sahara Desert (2022 Jul 11)
- Replies: 36
- Views: 6612
Re: APOD: Andromeda over the Sahara Desert (2022 Jul 11)
is Triangulum Galaxy a thing you can see ? Because its photons must be 3.2 million years old They start off with... “ What is the oldest thing you can see? ” Then they qualify it with a “likely” later on in the post… “ Given its distance, light from Andromeda is likely also the farthest object that...
- Sun Jul 10, 2022 2:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: In the Center of the Cat's Eye Nebula (2022 Jul 10)
- Replies: 41
- Views: 20555
Re: APOD: In the Center of the Cat's Eye Nebula (2022 Jul 10)
Brilliant image… “ The corpse, already greatly decayed and clotted with gore, stood erect before the eyes of the spectators. Upon its head, with red extended mouth and solitary eye of fire, sat the hideous beast whose craft had seduced me into murder, and whose informing voice had consigned me to th...
- Thu Jul 07, 2022 7:37 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Milky Way Motion in 3D from Gaia (2022 Jul 06)
- Replies: 13
- Views: 3752
Re: APOD: Milky Way Motion in 3D from Gaia (2022 Jul 06)
So it seems according to the image that the central bar is rotating in a direction opposite the rest of the galaxy but the caption implies this is an illusion caused by the Sun’s motion. How does that work? We're not seeing the motion of the stars here in the galaxy's frame of reference, but in our...
- Wed Jul 06, 2022 6:38 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Milky Way Motion in 3D from Gaia (2022 Jul 06)
- Replies: 13
- Views: 3752
Re: APOD: Milky Way Motion in 3D from Gaia (2022 Jul 06)
So it seems according to the image that the central bar is rotating in a direction opposite the rest of the galaxy but the caption implies this is an illusion caused by the Sun’s motion.
How does that work?
Eric
How does that work?
Eric
- Mon Jul 04, 2022 9:47 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Strawberry Supermoon Over Devil's Saddle (2022 Jul 04)
- Replies: 9
- Views: 2012
Re: APOD: Strawberry Supermoon Over Devil's Saddle (2022 Jul 04)
This is definitely one of my all time favorite APOD titles!
- Sat Jul 02, 2022 10:25 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solargraphic Analemmas (2022 Jul 02)
- Replies: 15
- Views: 3926
Re: APOD: Solargraphic Analemmas (2022 Jul 02)
Victor, those are wonderful!
Eric
Eric
- Tue Jun 28, 2022 5:48 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mercury from Passing BepiColombo (2022 Jun 28)
- Replies: 5
- Views: 1889
Re: APOD: Mercury from Passing BepiColombo (2022 Jun 28)
Earth might be the densest planet but the reason Earth is more dense is because of gravitational compression. In fact though Mercury is by far the smallest planet with a radius of 2440 km it has basically the same surface gravity of Mars which has a radius of 3396 km! Awesome photo btw. I love when ...
- Sat Jun 25, 2022 8:16 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
- Replies: 30
- Views: 9824
Re: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
Hmm, never looked at it that way…Chris Peterson wrote: ↑Sat Jun 25, 2022 6:14 pmIt appears to me to have the same eccentricity as the galaxy as a whole. As the galaxy is a disc, that would imply that the core is, as well.XgeoX wrote: ↑Sat Jun 25, 2022 6:04 pmLooks much more oval than circular to me, just saying.Chris Peterson wrote: ↑Thu Jun 23, 2022 3:19 pm
All I see is a circular central bulge seen at a tilt.
- Sat Jun 25, 2022 6:06 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
- Replies: 30
- Views: 9824
Re: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
NGC 6744, depending on the exposure and filters, looks to be right on the precipice of being a barred spiral… https://web.archive.org/web/20080721034305im_/http://www.aao.gov.au/images/image/aatccd006.jpg Eric Wikipedia wrote: NGC 6744 (also known as Caldwell 101) is an intermediate spiral galaxy a...
- Sat Jun 25, 2022 6:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
- Replies: 30
- Views: 9824
Re: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
Looks much more oval than circular to me, just saying.Chris Peterson wrote: ↑Thu Jun 23, 2022 3:19 pmAll I see is a circular central bulge seen at a tilt.
- Thu Jun 23, 2022 11:05 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
- Replies: 30
- Views: 9824
Re: APOD: Spiral Galaxy NGC 6744 (2022 Jun 23)
NGC 6744, depending on the exposure and filters, looks to be right on the precipice of being a barred spiral…
Eric
Eric
- Fri May 20, 2022 9:02 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A View from Earth's Shadow (2022 May 20)
- Replies: 8
- Views: 2822
Re: APOD: A View from Earth's Shadow (2022 May 20)
Serene is the perfect description for this beautiful image.
Eric
Eric
- Mon May 16, 2022 7:47 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Milky Way over French Alp Hoodoos (2022 May 16)
- Replies: 9
- Views: 3468
Re: APOD: Milky Way over French Alp Hoodoos (2022 May 16)
Cool photo, great composition but a little too saturated for my taste.
- Thu May 05, 2022 9:22 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 3521: Galaxy in a Bubble (2022 May 05)
- Replies: 20
- Views: 11883
Re: APOD: NGC 3521: Galaxy in a Bubble (2022 May 05)
This pic shows especially well that a galaxy isn't a neat and tidy spiral. Many pics of other galaxies suggest a cloud of stars, relatively disorganised, around the main structure, but not as clearly as this. So the Milky Way will have a shell of stars. Do we know this, or only infer it? John We kn...
- Tue May 03, 2022 6:58 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mercury's Sodium Tail (2022 May 03)
- Replies: 10
- Views: 5962
Re: APOD: Mercury's Sodium Tail (2022 May 03)
The question might then be asked what sort of tail/trail might Venus and planet Earth be showing November 12, 2010: Did you know that the Earth has a dust tail? The Spitzer Space Telescope sailed right through it a few months ago, giving researchers a clear idea of what it looks like. That could be...
- Sat Apr 30, 2022 3:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M44: The Beehive Cluster (2022 Apr 30)
- Replies: 16
- Views: 5755
Re: APOD: M44: The Beehive Cluster (2022 Apr 30)
A very worthy image indeed Drew! It’s so beautiful and sharp my first thought was “Hubble”.DrewJEvans wrote: ↑Sat Apr 30, 2022 5:40 am Thanks so much for selecting my image as APOD.
Quite honored. Clear skies everyone.
Thanks for sharing!
Eric
- Sun Apr 24, 2022 5:23 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Split the Universe (2022 Apr 24)
- Replies: 17
- Views: 4999
Re: APOD: Split the Universe (2022 Apr 24)
Someone should have put dinger in a box and see how he liked it!
Eric
Eric