Search found 1117 matches
- Fri Apr 05, 2024 5:46 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Solar Corona Unwrapped (2024 Apr 05)
- Replies: 21
- Views: 1200
Re: APOD: The Solar Corona Unwrapped (2024 Apr 05)
Sure. And as you move off the centerline you also get closer to the Sun's surface along on axis. The Moon is closer to us now than it usually is during eclipses, so appears larger than the Sun... the consequence being a very long period of totality (about 5 minutes). Thanks. Are these "greater...
- Sat Feb 24, 2024 5:22 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: To the Moon (2024 Feb 24)
- Replies: 15
- Views: 1335
Re: APOD: To the Moon (2024 Feb 24)
Well, the news is Odie tipped over during landing while having an unplanned horizontal motion. It's condition still appears good, and may still get enough sunlight for the solar array power.
- Tue Feb 20, 2024 12:46 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Looking Sideways from the Parker... (2024 Feb 19)
- Replies: 12
- Views: 1455
Re: APOD: Looking Sideways from the Parker... (2024 Feb 19)
There is a cluster in the very beginning of the video (at 2 seconds). Could this cluster be M11? What do you think? APOD 19 February 2024 annotated.png https://upload.wikimedia.org/wikipedia/commons/thumb/7/78/M11_Killarney_Provincial_Park_Observatory.jpg/1200px-M11_Killarney_Provincial_Park_Observ...
- Sat Jan 27, 2024 5:27 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Full Observatory Moon (2024 Jan 27)
- Replies: 8
- Views: 1219
- Fri Jan 19, 2024 3:27 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Northern Lights from the Stratosphere (2024 Jan 18)
- Replies: 23
- Views: 2370
Re: APOD: Northern Lights from the Stratosphere (2024 Jan 18)
" Lower energy particles descend deeper"? Surely, that must be higher energy particles, right? The following link has a lot more detail that was very clearly explicated - clearly enough even for me to understand! It's complicated. Higher energy particles can be preferentially absorbed dep...
- Fri Dec 29, 2023 3:26 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Cathedral, Mountain, Moon (2023 Dec 25)
- Replies: 37
- Views: 11973
- Sat Dec 09, 2023 2:37 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orion and the Ocean of Storms (2023 Dec 07)
- Replies: 20
- Views: 7136
Re: APOD: Orion and the Ocean of Storms (2023 Dec 07)
Sky & Tel: Bits of Theia Might Be in Earth's Mantle LInked Nature article: Moon-forming impactor as a source of Earth’s basal mantle anomalies Interesting. The statement that the cores of proto-Earth and Theia likely merged would seem to rule out a "glancing blow". It's also not clear...
- Fri Dec 08, 2023 5:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orion and the Ocean of Storms (2023 Dec 07)
- Replies: 20
- Views: 7136
Re: APOD: Orion and the Ocean of Storms (2023 Dec 07)
So then what did happen to the stuff that made up Theia? Was it just ejected away from the Earth-Moon system? It would seem very unlikely that none of Theia was incorporated. The simulations I've seen involve glancing blows where most of the colliding body (now melted) continues on its way. But the...
- Fri Dec 01, 2023 5:19 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Artemis 1: Flight Day 13 (2023 Nov 30)
- Replies: 22
- Views: 65864
Re: APOD: Artemis 1: Flight Day 13 (2023 Nov 30)
The planet and its large natural satellite even appear about the same apparent size Hardly. The Earth is only about 60% of the size of the Moon here! Yes. In fact, about 4 hrs prior to the image, the moon occulted the Earth for about 77 minutes. Correction: Occultation starts 3.6 hours prior; durat...
- Tue Oct 17, 2023 11:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: PDS 70: Disk, Planets, and Moons (2023 Oct 17)
- Replies: 14
- Views: 16930
Re: APOD: PDS 70: Disk, Planets, and Moons (2023 Oct 17)
Let's add some annotations to make this all more clear (hopefully): the PDS 70 protoplanetary star system.jpg On the surface, certainly seems reasonable you've correctly labeled 70b, but according to the ESO desription , 70b is not visible this image, and nothing said about those additional blob(s)...
- Sun Oct 15, 2023 3:58 am
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Submissions: 2023 October
- Replies: 158
- Views: 393228
Re: Submissions: 2023 October
Annular Eclipse October 14, 2023 Annular Eclipse from Mount Vernon, WA.jpg Copyright: Travis Seamans Location: Mount Vernon, WA Date & Time: 14 Oct 2023, 09:14 PDT (6½ minutes before maximum eclipse) Camera: Cell phone, Galaxy S21 Ultra, hand-held Filter: Eclipse safety glasses, hand-held
- Fri Oct 13, 2023 3:56 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mu Cephei (2023 Oct 12)
- Replies: 15
- Views: 16126
Re: APOD: Mu Cephei (2023 Oct 12)
... Well, if Gaia has measured the parallax of Mu Cephei, then the news of this has not come to Simbad . The APOD caption said that the distance to Mu Cephei is nearly 3,000 light-years from planet Earth. Did Gaia tell you that, Robert Nemiroff and Jerry Bonnell, in private communication? Even thou...
- Fri Oct 13, 2023 3:12 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mu Cephei (2023 Oct 12)
- Replies: 15
- Views: 16126
Re: APOD: Mu Cephei (2023 Oct 12)
... Wikipedia wrote: The distance to Mu Cephei is not very well known. The Hipparcos satellite was used to measure a parallax of 0.55±0.20 mas, which corresponds to an estimated distance of 1,800 parsecs. However, this value is close to the margin of error. A determination of the distance based upo...
- Wed Oct 11, 2023 4:23 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Hidden Orion from Webb (2023 Oct 10)
- Replies: 13
- Views: 14103
Re: APOD: Hidden Orion from Webb (2023 Oct 10)
Are there two clusters in Trapezium, or just one? https://asterisk.apod.com/download/file.php?id=48541&t=1 There are two clusters all right. "The Trapezium proper" is just one cluster, of course. But there is most certainly another cluster to the northwest (upper right) of it, the one...
- Wed Oct 11, 2023 12:05 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Hidden Orion from Webb (2023 Oct 10)
- Replies: 13
- Views: 14103
Re: APOD: Hidden Orion from Webb (2023 Oct 10)
Just one - circled lower left.johnnydeep wrote: ↑Tue Oct 10, 2023 9:01 pm Are there two clusters in Trapezium, or just one?
trapezium - one or two clusters.png
- Sat Oct 07, 2023 2:29 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Back from Bennu (2023 Sep 29)
- Replies: 27
- Views: 24523
Re: APOD: Back from Bennu (2023 Sep 29)
Yes, push pins sounds good. And the Kapton tape holds the pins in place until the lid is attached to the venting hole. The white disc under the tape could be made of e.g. Teflon or ceramic. In case of Teflon the Tape will not stick very well, unless the surface would have been activated, with plasm...
- Mon Oct 02, 2023 4:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Back from Bennu (2023 Sep 29)
- Replies: 27
- Views: 24523
Re: APOD: Back from Bennu (2023 Sep 29)
I hope someone is able to answer my question even if I am asking it a day late...what does the "sun" emblem mean and why was it not charred upon re-entry? I wondered about that too. Since you asked, I looked into it and can answer your question. I couldn't find what the emblem meant, but ...
- Sun Oct 01, 2023 3:23 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Back from Bennu (2023 Sep 29)
- Replies: 27
- Views: 24523
Re: APOD: Back from Bennu (2023 Sep 29)
I hope someone is able to answer my question even if I am asking it a day late...what does the "sun" emblem mean and why was it not charred upon re-entry? I wondered about that too. Since you asked, I looked into it and can answer your question. I couldn't find what the emblem meant, but ...
- Sun Oct 01, 2023 2:15 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Harvest Moon over Tuscany (2023 Sep 30)
- Replies: 6
- Views: 4571
Re: APOD: A Harvest Moon over Tuscany (2023 Sep 30)
This is the instagram address: https://www.instagram.com/giabar5/johnnydeep wrote: ↑Sat Sep 30, 2023 1:59 pm PS - the link to the credited copyright holder doesn't work, but perhaps that's deliberate, based on how it looks: "https://apod.nasa.gov/apod/giabar5insta [at] gmail []"
- Sat Sep 30, 2023 4:53 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Back from Bennu (2023 Sep 29)
- Replies: 27
- Views: 24523
Re: APOD: Back from Bennu (2023 Sep 29)
... P.S. it would seem the capsule photo has been 'sanitized' by removing the parachute. Its even been disconnected in this view. For reasons that can only be guessed at ? https://earthsky.org/upl/2023/09/asteroid-sample-OSIRIS-REx-wide-view-cp2.jpeg Viewing a NASA visualization video of the landin...
- Mon Sep 25, 2023 8:57 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arp 142: The Hummingbird Galaxy (2023 Sep 25)
- Replies: 38
- Views: 20140
Re: APOD: Arp 142: The Hummingbird Galaxy (2023 Sep 25)
So the two bright blue stars at the top of the pic are obviously stars from our galaxy but the stream of stars behind the right star looks to be an irregular galaxy. Is that correct? How far distant is that from the star in front? Thanks. The galaxy goes by LEDA 1237172, and is identified only as a...
- Thu Sep 21, 2023 2:44 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
- Replies: 16
- Views: 2798
Re: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
I still don't understand why the crescent slivers aren't all identical on each side. Aren't we seeing the same left or right limn of the Moon in either case? I don't understand your question. The shadows on the left side originate from the left lunar limb, and the right side shadows come from the r...
- Tue Sep 19, 2023 11:32 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
- Replies: 16
- Views: 2798
Re: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
Today's APOD is accompanied by insufficient information--as you can see by the other questions. Are all the rings what appears at the edge of the moon just before and after the eclipse but would be seen in the same place? How much time elapses between the rings? Why is there no "diamond ring&q...
- Mon Sep 18, 2023 8:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
- Replies: 16
- Views: 2798
Re: APOD: Moon Mountains Magnified during Ring... (2023 Sep 17)
Today's APOD is accompanied by insufficient information--as you can see by the other questions. Are all the rings what appears at the edge of the moon just before and after the eclipse but would be seen in the same place? How much time elapses between the rings? Why is there no "diamond ring&q...
- Tue Sep 12, 2023 8:31 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Comet Nishimura Grows (2023 Sep 09)
- Replies: 14
- Views: 2686
Re: APOD: Comet Nishimura Grows (2023 Sep 09)
Those exposures were so short (on the order of 5 or 6 minutes total, stacked from 10 or 15 second subs), and the field wide enough, that I just let a small, roughly polar aligned mount track the sky. Then I aligned on the comet. You can see that the stars are trailed slightly. Longer exposures at a...