Search found 50 matches
- Mon Oct 06, 2008 6:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Layers of Red Cliffs on Mars (APOD 06 Oct 2008)
- Replies: 8
- Views: 3155
Red Cliffs of Mars 6 Oct 2008
There are a number of items of immediate interest. One, which I had seen in another discussion, speculated on the formation of the type of surface seen in the lower right. That is almost identical to the surface we see on old, wind eroded ice. Second, the red cliff bands periodically over the 1 km d...
- Sat Oct 04, 2008 5:13 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: High Cliffs Surrounding Echus Chasma on Mars (23 Jul 2008)
- Replies: 37
- Views: 15382
henk, The common assumption is that the core is cool because there is no magnetic field. But if it were solely silica heated by uranium I don't believe that would set up a field either. I think you need an iron core for magnetism. And even if it does have a hot, iron core; if it were turning with th...
- Mon Jul 28, 2008 7:36 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: High Cliffs Surrounding Echus Chasma on Mars (23 Jul 2008)
- Replies: 37
- Views: 15382
Re: Ice or soil? That's the question
There is one major aspect that breaks the similarity between Mars and earth: the difference between the freezing temperature of water and the respective average surface temperatures. On Mars the average surface temperature is an odd 30 K lower than on earth. Here on earth a decrease of 10 K in aver...
- Sun Jul 27, 2008 6:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: High Cliffs Surrounding Echus Chasma on Mars (23 Jul 2008)
- Replies: 37
- Views: 15382
That image, especially if you shrink and display the whole image, appears to have been stored and transmitted as a .jpg too many times. It is beginning to appear as shot through a screen door. JPG should never be used for analysis if possible. It is the only compression scheme which actually changes...
- Sat Jul 26, 2008 12:10 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Ice (APOD 02 Jun 2008)
- Replies: 36
- Views: 17810
Okay, so I've come to believe water[ice currently] is much more prevalent on Mars than ever thought. Not only do we land atop it, but the July 8 APOD looks to me to have a floor of water vs the lava speculated. There is APOD discussion (you'll have to skim over all the posts concerning optical color...
- Fri Jul 25, 2008 11:46 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: High Cliffs Surrounding Echus Chasma on Mars (23 Jul 2008)
- Replies: 37
- Views: 15382
Nope. I feel that the chasma is filled with water even more. It may be covered deeper with insulating soil than that which we saw under the lander but look at that surface. Those look like leads which have opened at some time in the past and refrozen; just as they do in the Arctic. And with experts ...
- Wed Jul 23, 2008 5:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: High Cliffs Surrounding Echus Chasma on Mars (23 Jul 2008)
- Replies: 37
- Views: 15382
- Tue Jun 24, 2008 9:02 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Ice (APOD 02 Jun 2008)
- Replies: 36
- Views: 17810
- Sat Jun 21, 2008 2:33 am
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Circumhorizontal Arc [Fire Rainbow]
- Replies: 15
- Views: 16492
How strange to come home to this in my email after I had just witnessed my first circumhorizontal arc. With noon being directly overhead, it was at about 11 or 1 o'clock, and on a clear, sunny day in the 80's with wispy cirrus clouds. Though the sky was very similar to the prior post, the 'Fire Rain...
- Tue Jun 03, 2008 5:44 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Ice (APOD 02 Jun 2008)
- Replies: 36
- Views: 17810
- Tue Jun 03, 2008 5:41 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Ice (APOD 02 Jun 2008)
- Replies: 36
- Views: 17810
Apodman: there are examples to follow as you mouse-over each command [and they only appear when posting] But there are a couple more interesting items about the APOD image . Firstly it seems to be too jpg degraded [note the worms frothing the soil in shadow] for too detailed an analysis. But someone...
- Mon Jun 02, 2008 5:44 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Ice (APOD 02 Jun 2008)
- Replies: 36
- Views: 17810
Martian Ice (APOD 02 Jun 2008)
So if that is ice under Phoenix, why is it at different levels? Though the 'ice' exposures by the far leg all seem about the same height, the exposure closest to the camera seems much higher. Isn't the surface temperature fairly uniform such that all ice would be at the same depth? Or is this just h...
- Thu Feb 14, 2008 8:38 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Mercury's Spider Crater (APOD 04 Feb 2008)
- Replies: 58
- Views: 22137
If I'd like to stop by for some stimulating conversation, there aren't too many homes in the Tacoma area with foil covered windows, are there? I would hope you'd leave your irrational and unsubstantiated theories behind. But if you truly believe that some advanced civilization can travel to our area...
- Sun Feb 10, 2008 9:23 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Mercury's Spider Crater (APOD 04 Feb 2008)
- Replies: 58
- Views: 22137
Yes, and this image also shows the pockmarked flat of the Yucca Mtn [whole region left of center]. Most of those were the result of bomb drops, devices on towers and those suspended from balloons. But what I search for is those few tests towards the end of the 50's where the research began to go und...
- Sat Feb 09, 2008 7:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Mercury's Spider Crater (APOD 04 Feb 2008)
- Replies: 58
- Views: 22137
Yes, I was thinking subterranean explosions too; but a bit deeper than the one resulting in the crater you picture. I was more interested in those which were contained underground and which I saw slump and vent in peripheral whisps. I can't find those tests or pictures right now as all I can find ar...
- Fri Feb 08, 2008 6:34 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Mercury's Spider Crater (APOD 04 Feb 2008)
- Replies: 58
- Views: 22137
Thanks, that's what I was looking for. I would think these steep cliffs would indicate a relatively 'fresh' crater. And I can understand that almost all impacts on Mercury would be close to the vertical as the rocks are accelerating toward the sun. Thanks to your crop, if we are looking down into th...
- Wed Feb 06, 2008 8:13 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Mercury's Spider Crater (APOD 04 Feb 2008)
- Replies: 58
- Views: 22137
I don't blame him for being confused about your attack. I believe he was referencing your prior comment about the stitching operation. Just goes to demonstrate how easily people can be misunderstood in this medium though nothing required your response other than your own mind. I for one would like f...
- Mon Feb 04, 2008 6:13 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Mercury's Spider Crater (APOD 04 Feb 2008)
- Replies: 58
- Views: 22137
Mercury's Spider Crater (APOD 04 Feb 2008)
With the sunshine coming from the lower right of the photo, my mind is having a hard time assembling what must be a very steep and deep cliff down to the depression in the center from which all the rays seem to eminate.
I'm hoping Crater Chains will give us his insight.
I'm hoping Crater Chains will give us his insight.
- Thu May 03, 2007 11:24 pm
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Circumhorizontal Arc [Fire Rainbow]
- Replies: 15
- Views: 16492
Yes, that was the article that the original photo here was posted from.
Another good site explaining this and other atmospheric phenomena is:
http://www.atoptics.co.uk/halo/cha2.htm
Another good site explaining this and other atmospheric phenomena is:
http://www.atoptics.co.uk/halo/cha2.htm
- Mon Sep 04, 2006 5:52 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Space Colonies, CoEvolution
- Replies: 38
- Views: 17669
This thread seems to be a very good example of the oft repeated theory that seemingly intelligent people are not only incapable of understanding basic social interactions, but are unwilling to even attempt the practice of more appropriate interactions. I'm sure that most of you are chronologically m...
- Sun Sep 03, 2006 7:13 am
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Circumhorizontal Arc [Fire Rainbow]
- Replies: 15
- Views: 16492
I find nothing unusual in researching ice formation in thunderheads; but why would NASA or DOD care to subvert such research and what would be her connection? Intelligent people are not necessarily logical nor reasonable and can be quite disruptive, but you suggest some degree of malicious intent. I...
- Fri Sep 01, 2006 6:32 pm
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Circumhorizontal Arc [Fire Rainbow]
- Replies: 15
- Views: 16492
FieryIce
Though I avoid Google and use Webcrawler [which like Google polls all the major engines though my results differ from Google] I could do a search for your answer, but then you're obviously savvy otherwise you wouldn't be on this site. What puzzles me is that someone with the moniker, FieryIce, shoul...
- Sat Aug 05, 2006 5:11 pm
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Circumhorizontal Arc [Fire Rainbow]
- Replies: 15
- Views: 16492
Circumhorizontal Arc [Fire Rainbow]
http://news.nationalgeographic.com/news/2006/06/images/060619-rainbow-fire_big.jpg National Geographic Though a circumhorizontal arc (fire rainbow) is one of the rarest of atmospheric phenomina, this one 3 June 2006 over the northern Washington/Idaho border is by far the most brilliant ever capture...
- Mon Mar 27, 2006 2:25 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Eta Carinae Fatal pulse (APOD 26 Mar 2006)
- Replies: 103
- Views: 39566
Re: dying on the vine
And maybe us too !kovil wrote:at least out[sic] tomatoes won't spoil.
All higher plants and animals depend upon bacteria and enzymes to extract most of the nutrients from their food.
A dosage as forcast here would be catastrophic.
- Sun Mar 26, 2006 4:51 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Eta Carinae Fatal pulse (APOD 26 Mar 2006)
- Replies: 103
- Views: 39566
Strange how the picture looks so like a captured moment just as a sphere first begins to explode in a pattern much like an antenna radiation pattern. The effects you speak of give me pause as any effect can only augment our rapidly warming environment. The increased energy being added to our system ...