Here is an example of a non-circular crater, Ryder Crater with discussion of how it might have been formed.
https://www.universetoday.com/148616/wh ... -this-way/
https://www.universetoday.com/wp-conten ... r_crop.jpg
Search found 31 matches
- Fri Aug 30, 2024 3:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Southern Moonscape (2024 Aug 30)
- Replies: 9
- Views: 1705
- Tue Jul 23, 2024 6:34 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Crab Nebula from Visible to X-Ray (2024 Jul 23)
- Replies: 10
- Views: 8616
Re: APOD: The Crab Nebula from Visible to X-Ray (2024 Jul 23)
https://apod.nasa.gov/apod/image/2407/Crab_MultiChandra_960.jpg Anyway, NASA had better make good use of the Chandra X-ray Telescope now before they retire it. It is such a shame that Chandra will be decommissioned, because the telescope has performed extremely well, has shown no great signs of agi...
- Tue Jul 16, 2024 4:25 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Meteor Misses Galaxy (2024 Jul 14)
- Replies: 19
- Views: 8244
Re: APOD: Meteor Misses Galaxy (2024 Jul 14)
I am more amazed by everything else other than the galaxy and the colored lighted meteorite streak. Look at the number of objects in visible light. I'm not seeing any refraction spikes etc, so assuming every single light blob is some galaxy. Yes ? How many ? 1000s.. Seems denser than deep/ultra dee...
- Mon Apr 29, 2024 1:46 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Comet, Planet, Moon (2024 Apr 29)
- Replies: 4
- Views: 1386
- Mon Apr 29, 2024 1:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Rings Around the Ring Nebula (2024 Apr 28)
- Replies: 15
- Views: 2499
Re: APOD: Rings Around the Ring Nebula (2024 Apr 28)
Are the different "rings" shown in this image from successive shedding events when it "evolves to throw off it's outer atmosphere"?
- Sat Apr 13, 2024 8:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Palm Tree Partial Eclipse (2024 Apr 13)
- Replies: 11
- Views: 1987
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,...
- Mon Apr 01, 2024 5:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Swirling Magnetic Field around Our... (2024 Apr 01)
- Replies: 25
- Views: 2610
Re: APOD: Swirling Magnetic Field around Our... (2024 Apr 01)
If this is the accretion disk, wouldn't it be parallel to the galaxy and since we are in the galaxy, wouldn't this view be impossible to see? So then in contrast to what they say, this is not a photo. Am I wrong? The video, that Ann posted, does an excellent job of expelling why we will see the acc...
- Thu Jan 25, 2024 6:52 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Jyväskylä in the Sky (2024 Jan 25)
- Replies: 3
- Views: 1879
Re: APOD: Jyväskylä in the Sky (2024 Jan 25)
Thank you Johnnydeep. This is great to see the map side by side with the image.
- Mon Dec 11, 2023 5:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solar Minimum versus Solar Maximum (2023 Dec 11)
- Replies: 13
- Views: 7988
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...
- Tue Dec 05, 2023 11:13 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Energetic Particle Strikes the Earth (2023 Dec 05)
- Replies: 16
- Views: 9050
Re: APOD: Energetic Particle Strikes the Earth (2023 Dec 05)
Thanks, that's pretty interesting! I'm still not sure how an electrically neutral nuclei can be "reflected" though, except by kinetically impacting other particles. Unless that's just what is meant here, which could explain the paddle analogy. Guess I might have to (try to) actually read ...
- Wed Nov 01, 2023 8:13 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Annular Solar Eclipse over Utah (2023 Nov 01)
- Replies: 33
- Views: 38849
Re: APOD: Annular Solar Eclipse over Utah (2023 Nov 01)
Something unreal about his picture, besides the artificial full moon. I understand that during the full annular eclipse that the sky gets dark because the moon is blocking the sunlight. But then why at the top right when the moon has passed away from in front of the sun is the sky black instead the...
- Mon Jul 31, 2023 3:57 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Phobos over Mars (2023 Jul 31)
- Replies: 29
- Views: 8231
Re: APOD: Phobos over Mars (2023 Jul 31)
Ann asked: "Near bottom of the image, we can clearly see the typical orange-colored Martian land mass, with interspersed craters. But what is the undulating whitish-beige "tapestry" that covers much of the rest of the picture? Is that the Martian cloud cover? Does Mars have so many cl...
- Wed Mar 15, 2023 7:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Jupiter and Venus Converge over Germany (2023 Mar 15)
- Replies: 9
- Views: 2242
Re: APOD: Jupiter and Venus Converge over Germany (2023 Mar 15)
Here is an image I captured of Jupiter and Venus. You can see three of Jupiter's moons. To get the moons to show I did have to over expose the planets, making them appear larger than they are.
- Fri Dec 23, 2022 5:27 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Cassini Looks Out from Saturn (2022 Dec 23)
- Replies: 13
- Views: 4144
Re: APOD: Cassini Looks Out from Saturn (2022 Dec 23)
Thank you Johnnydeep. When I came to this discussion thread I said "I know someone smart will show me the moons. And you did. I tried the same inverting the image colors as you did and now I can find the moons. Great tip, thanks.
- Tue Nov 08, 2022 3:21 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Galaxies: Wild's Triplet from Hubble (2022 Nov 08)
- Replies: 21
- Views: 4474
Re: APOD: Galaxies: Wild's Triplet from Hubble (2022 Nov 08)
I wonder what the night sky would look like from a planet around one of the starts in the "bridge" compared to being around a star within the galaxy?
- Sat Aug 13, 2022 4:39 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Herschel Crater on Mimas (2022 Aug 13)
- Replies: 4
- Views: 2514
Re: APOD: Herschel Crater on Mimas (2022 Aug 13)
It looks like there are two "volcanos" within the crater. Both close to the rim. One at about 5:30 and the other at about 7:30. Were these the result of the impactor melting ice with in Mimas or other forces?
- Mon Jun 06, 2022 2:44 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Milky Way Galaxy Doomed: Collision... (2022 Jun 06)
- Replies: 19
- Views: 3792
Re: APOD: Milky Way Galaxy Doomed: Collision... (2022 Jun 06)
It would be interesting to see the interaction between the black holes at the centers of each galaxy during the collision.
- Sat Oct 09, 2021 3:33 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Double Cluster in Perseus (2021 Oct 08)
- Replies: 11
- Views: 3197
Re: APOD: The Double Cluster in Perseus (2021 Oct 08)
Johnnydeep, “(And I'm still looking for where they are said to be produced by guitar strings...)”. If you look two photos down in the photographer’s Instagram, he explains using the guitar strings and shows a photo of his setup.
- Sun Sep 26, 2021 5:43 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseid Outburst at Westmeath Lookout (2021 Sep 24)
- Replies: 14
- Views: 5545
Re: APOD: Perseid Outburst at Westmeath Lookout (2021 Sep 24)
If I had to guess, it might be a Mac, or since Ann mentioned "uploading" maybe a web doc service like Google docs. Or maybe a combination. I’m not familiar with Google docs, but deleting a file, image or otherwise, is easily done on a Mac. I wonder if there is something in the software An...
- Wed Sep 08, 2021 6:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Deep Sky Toward Andromeda (2021 Sep 08)
- Replies: 29
- Views: 8023
Re: APOD: The Deep Sky Toward Andromeda (2021 Sep 08)
Thank you, Ann, for your labelled version of this picture ! Without it I was confused. On a PC at least, mousing over the APOD image reveals the annotations. But I think this doesn't work right - or at all - on an iPad, for example. On my iPad, I was able to tap the image to reveal the annotations.
- Thu Feb 04, 2021 9:29 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Apollo 14: A View from Antares (2021 Feb 04)
- Replies: 21
- Views: 8000
Re: APOD: Apollo 14: A View from Antares (2021 Feb 04)
When I zoomed into the rock near the horizon, I noticed a reddish “bubble” on and just above the horizon, near the rock.. Is that lens flare or swamp gas? It appears that the sun is over the astronauts right shoulder and shouldn’t cause a lens flair. Since they were shooting through the lander’s wi...
- Sun Feb 16, 2020 4:27 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 2392: Double-Shelled Planetary... (2020 Feb 16)
- Replies: 19
- Views: 6959
Re: APOD: NGC 2392: Double-Shelled Planetary... (2020 Feb 16)
Beautiful and interesting composition. It reminds me more of a Portuguese man-of-war than fur hooded head. I do have to wonder how they stuffed light year long filaments into a one-third light year wide nebula, though. It looks like the orange filaments extend beyond the outer shell. They show up b...
- Sun Oct 27, 2019 6:44 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Ghost Aurora over Canada (2019 Oct 27)
- Replies: 21
- Views: 11146
Re: APOD: Ghost Aurora over Canada (2019 Oct 27)
I see a Phoenix rising from the ashes.
- Sat Oct 26, 2019 12:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Dark Seahorse in Cepheus (2019 Oct 24)
- Replies: 5
- Views: 5978
Re: APOD: Dark Seahorse in Cepheus (2019 Oct 24)
Here a link to an article “The Dark Constellations of the Incas”
https://futurism.com/the-dark-constella ... -the-incas
Hope this is helpful.
https://futurism.com/the-dark-constella ... -the-incas
Hope this is helpful.
- Tue Dec 18, 2018 5:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M31: The Andromeda Galaxy (2018 Dec 17)
- Replies: 9
- Views: 4090
Re: APOD: M31: The Andromeda Galaxy (2018 Dec 17)
Should I be taking out galaxy collision insurance? Get it now before the rates go up.