Search found 631 matches
- Tue Mar 19, 2013 1:07 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: GRAIL Maps the Moons Gravity (2013 Mar 19)
- Replies: 26
- Views: 8610
Re: APOD: GRAIL Maps the Moons Gravity (2013 Mar 19)
What does this GRAIL depiction imply for - Red spots? Blue spots? Blue spots surrounded by red? Blue spots with red spots in the center? I realize the differences in gravity as described, but does anyone have any advanced ideas about the overall implications? I definitely have my own ideas. Doug Ett...
- Mon Nov 12, 2012 2:38 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Van Allen Probes: Radiation Belt Storm Probes (RBSP)
- Replies: 39
- Views: 19074
Re: Radiation Belt Storm Probes (RBSP): The Electric Atmosph
Thank you, Bystander. Yes, we will all stand by to receive answers about the Earth's magnetosphere.
Doug
Doug
- Mon Nov 12, 2012 2:23 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Asteroid Capture by Outer Planets
- Replies: 11
- Views: 3741
Re: Asteroid Capture by Outer Planets
I am not asking to place your life or career on the line, but certainly ones reputation is important. I was only asking for one or two possibilities that should be in the range of scientific thought. You were still very helpful.
Doug
Doug
- Fri Nov 09, 2012 3:30 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Asteroid Capture by Outer Planets
- Replies: 11
- Views: 3741
Re: Asteroid Capture by Outer Planets
Sorry, I never heard of asymmetry used in these terms. But, yes, tidally locked bodies can lead to asymmetry.
So not too much was ventured in saying Dione was created by asymmetry of tidal locking and resurfacing processes.
Doug
So not too much was ventured in saying Dione was created by asymmetry of tidal locking and resurfacing processes.
Doug
- Thu Nov 08, 2012 9:49 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Asteroid Capture by Outer Planets
- Replies: 11
- Views: 3741
Re: Asteroid Capture by Outer Planets
Before we leave this subject, what is "asymmetry of a tidally locked body" and how does it affect hemispherical-wide surface differences ?
Doug
Doug
- Thu Nov 08, 2012 7:12 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Asteroid Capture by Outer Planets
- Replies: 11
- Views: 3741
Re: Asteroid Capture by Outer Planets
Excellent. Our Great Protectors keep doing their duty. And the solar system keeps doing what we suspect but at a hopefully much diminished rate. It is very strange that I missed or neglected this observational data. I am still very curious what you personally think happened to Dione in order to have...
- Thu Nov 08, 2012 6:27 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Asteroid Capture by Outer Planets
- Replies: 11
- Views: 3741
Re: Asteroid Capture by Outer Planets
Thank you for this prompt reply, Chris. I totally agree with you answer to assumption number 2. Perhaps I incorrectly referred to comets (known to be much like asteroids in composition) as asteroids. Although some asteroids in highly elliptical orbits can be both in the inner and outer solar system,...
- Thu Nov 08, 2012 5:17 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Diameter of Solar System
- Replies: 46
- Views: 6867
Re: Diameter of Solar System
Sometimes the author neglects to state the conditions or I may neglect the conditions that are stated far away in another paragraph.
Always working hard to be less confused,
Doug
Always working hard to be less confused,
Doug
- Thu Nov 08, 2012 5:10 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Asteroid Capture by Outer Planets
- Replies: 11
- Views: 3741
Asteroid Capture by Outer Planets
I would like to have verified the following assumptions about the capture of asteroids by the outer gas giants. This topic was brought up during the discussion of the moon, Dione, but got lost in the flurry of thoughts. The assumptions are delinated below. 1. A majority of asterioids of the solar sy...
- Thu Nov 08, 2012 4:33 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Diameter of Solar System
- Replies: 46
- Views: 6867
Re: Diameter of Solar System
Conversion from radius to diameter is a factor of two if the object is roughly round or spherical.
Conversion of times can really be confusing. Is the time expressed measured from the Big Bang or from the present.
Doug
Conversion of times can really be confusing. Is the time expressed measured from the Big Bang or from the present.
Doug
- Mon Nov 05, 2012 9:41 pm
- Forum: The Communications Center: Breaking Science News
- Topic: Cassini Sees Huge Burp at Saturn after Large Storm
- Replies: 8
- Views: 4495
Re: Cassini Sees Huge Burp at Saturn after Large Storm
Neufer, your reply explains the extra heat energy but not the burp. The burp is similar (i.e., unexplainable) to geologic hot spots on Earth except that Earth's hot spots are more like continuous farts. I think you're closer to the truth than you imagine. Saturn is still devouring its sons and daugh...
- Mon Nov 05, 2012 9:31 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Saturns Moon Dione in Slight Color (2012 Nov 05)
- Replies: 30
- Views: 10287
Re: Dione's craters on one side.
It makes perfect sense to me that Dione should be most heavily cratered on its trailing side, because that is the direction from which the vast majority of material comes, including the vast majority of fast impacts. Smaller orbits have a faster angular velocity than larger orbits. They approach th...
- Sun Nov 04, 2012 11:09 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Curiosity: Mars Science Laboratory
- Replies: 277
- Views: 263005
Re: Curiosity: Mars Science Laboratory
Has NASA proposed the origin of the Jake Matijewic Rock? Did it fall from some low ledge? Was it carried to this location by water transport? Is the rock some fallen debris from a nearby impact?
Doug
Doug
- Sun Nov 04, 2012 10:43 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Dawn: Journey to the Asteroid Belt
- Replies: 181
- Views: 309541
Re: Dawn: Journey to the Asteroid Belt
Owlice, thank you. I am not very good at following the "threads" of abstracts and short articles. I will try to improve. I thought that someone would know already if this matter was sorted out. Besides being the Guardian of Codes what is your background that brings you to the forum? Are &q...
- Sun Nov 04, 2012 10:25 pm
- Forum: The Communications Center: Breaking Science News
- Topic: Cassini Sees Huge Burp at Saturn after Large Storm
- Replies: 8
- Views: 4495
Re: Cassini Sees Huge Burp at Saturn after Large Storm
Oh yes, now it get it. The burp was indigestion. Art, you seem to be knowledgeable of classical artists AND myths. I am hoping you can expand on a rumor of Roman and Greek myths. The myths are supposely derived from earlier times. The myths actually portray the actions between the planets told by a ...
- Fri Nov 02, 2012 3:08 pm
- Forum: The Communications Center: Breaking Science News
- Topic: Cassini Sees Huge Burp at Saturn after Large Storm
- Replies: 8
- Views: 4495
Re: Cassini Sees Huge Burp at Saturn after Large Storm
The size of the asteroid can be roughly estimated by the known size of the cometary pieces that caused certain size storms on Jupiter. How much ethylene is required to be mixed into Saturn's atmosphere to cause its detection? I do not know the parts per million needed for detection by our probe. But...
- Fri Nov 02, 2012 2:52 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Dawn: Journey to the Asteroid Belt
- Replies: 181
- Views: 309541
Re: Dawn: Journey to the Asteroid Belt
Thank you for referencing the above articles. The two articles "gsa" and "adsabs" differ in their dating of the largest impact craters on Vesta. Owlice, do you have any resolution to these different dating criteria of the Vesta impact craters. The "gsa" article states ...
- Fri Nov 02, 2012 2:30 pm
- Forum: The Communications Center: Breaking Science News
- Topic: Cassini Sees Huge Burp at Saturn after Large Storm
- Replies: 8
- Views: 4495
Re: Cassini Sees Huge Burp at Saturn after Large Storm
Nobody has ventured forward from NASA to propose the cause of this huge storm on Saturn. My inductive reasoning leads me to believe it could only be the result of a large asteroid strike that has large amounts methane. To suggest that Saturn burped is very unlikely. What could be the conceivable rea...
- Mon Oct 29, 2012 7:39 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Dawn: Journey to the Asteroid Belt
- Replies: 181
- Views: 309541
Re: Dawn: Journey to the Asteroid Belt
Thank you for referencing the above articles. The two articles "gsa" and "adsabs" differ in their dating of the largest impact craters on Vesta. Owlice, do you have any resolution to these different dating criteria of the Vesta impact craters. The "gsa" article states t...
- Mon Oct 29, 2012 6:28 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Distribution of Oort Cloud objects
- Replies: 14
- Views: 3960
Re: Distribution of Oort Cloud objects
Doug, thanks for answering my question; I appreciate it. By "published," I mean in peer-reviewed journals such as ApJ, A&A, and the like. Have you submitted your work to the major respected astronomy journals and been published by them? If you are not willing to subject your work to r...
- Mon Oct 29, 2012 6:18 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Distribution of Oort Cloud objects
- Replies: 14
- Views: 3960
Re: Distribution of Oort Cloud objects
Do not just be a bystander. Please help me with my communications. How do I receive peer review or get published in a ApJ or AetA journal ? I do not have direct connections to the academic community.
Doug
Doug
- Mon Oct 29, 2012 5:32 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Van Allen Probes: Radiation Belt Storm Probes (RBSP)
- Replies: 39
- Views: 19074
Re: Radiation Belt Storm Probes (RBSP): The Electric Atmosph
Rob, thanks for the warning. I am only a first year Physics person myself. This line of questioning is meant for any experts of the the physics of Earth's outer atmosphere. Electrons do not move along a conducting wire, but set up vibrations that carry the energy through a conductor. Electrons trave...
- Sun Oct 28, 2012 8:12 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Van Allen Probes: Radiation Belt Storm Probes (RBSP)
- Replies: 39
- Views: 19074
Re: Radiation Belt Storm Probes (RBSP): The Electric Atmosph
Rob, I was only asking your opinion, your very own idea off the top of your head. You basically know general scientific principles. I wasn't asking that you consult a slew of journals and then exclaim your most educated answer. Do the electrons captured from the solar winds give Earth a slightly neg...
- Sun Oct 28, 2012 7:41 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Distribution of Oort Cloud objects
- Replies: 14
- Views: 3960
Re: Distribution of Oort Cloud objects
I have to be very careful what I say to the Guardian of the Codes. Yes, Owlice, I do have my own published version of solar and general star system formation that differs in many ways from the popular, accepted version. I have my own website where my published ideas exist, but I am not allowed to te...
- Sat Oct 27, 2012 3:21 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Distribution of Oort Cloud objects
- Replies: 14
- Views: 3960
Re: Distribution of Oort Cloud objects
Thanks, Chris. Now, I am the happy recepient of the true meaning of these two illustrations. I was truly mis-lead by the 2nd illustration. Wikipedia says, "Oort noted that there was a peak in the numbers of nearly isotropic comets with aphelia - their farthest distances from the Sun - of roughl...