APOD and General Astronomy Discussion Forum
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You have cut me to the quickgeckzilla wrote:
Chris is one of the few qualified to answer astronomy questions with more than a link to a Wikipedia article.
Yes- the difference in inclination between Mercury's and Earth's orbital planes is about 7°.flash wrote:I wonder how an Earth-based radar could see into the craters on Mercury that the sun's rays cannot reach. Are the orbital planes of Earth and Mercury inclined to each other sufficiently that we can periodically look down onto the poles of Mercury?
Arecibo. Big aperture, high resolution.The resolution to be able to do this (and all the other things we do) is astounding... Where was the radar?
I'm a retired NOAA physicist & MIT grad with 4 grandchildren (2 nearby), 3 children (2 nearby) & a wife (1 nearby) .geckzilla wrote:
Art, despite all of your posting, I still have no idea who you are!
Art, not to get you started, but I can't help wondering what you said about the Bard or the Earl in those 27,000 posts.neufer wrote:I'm a retired NOAA physicist & MIT grad with 4 grandchildren (2 nearby), 3 children (2 nearby) & a wife (1 nearby) .geckzilla wrote:
Art, despite all of your posting, I still have no idea who you are!
I have a home in Maryland but mostly reside at my 95 year old mother's house in Alexandria,Va. (about three blocks from where I grew up and walked to elementary school).
I have 8,500 posts at the Starship Asterisk*
but 27,000 posts at humanities.lit.authors.shakespeare
(so I gotta bita catchin' up to do).
Ann, he provided a link; you could go read his posts there, you know.Ann wrote: Art, not to get you started, but I can't help wondering what you said about the Bard or the Earl in those 27,000 posts.
Ann
Arecibo's big aperture was important for its signal to noise not for its resolving power.Chris Peterson wrote:Arecibo. Big aperture, high resolution.flash wrote:
The resolution to be able to do this (and all the other things we do) is astounding... Where was the radar?
So Arthur Neuendorffer is your real name?neufer wrote:I'm a retired NOAA physicist & MIT grad with 4 grandchildren (2 nearby), 3 children (2 nearby) & a wife (1 nearby) .geckzilla wrote:
Art, despite all of your posting, I still have no idea who you are!
I have a home in Maryland but mostly reside at my 95 year old mother's house in Alexandria,Va. (about three blocks from where I grew up and walked to elementary school).
I have 8,500 posts at the Starship Asterisk*
but 27,000 posts at humanities.lit.authors.shakespeare
(so I gotta bita catchin' up to do).
A.C.Ne. : that's me.geckzilla wrote:
So Arthur Neuendorffer is your real name?
For imaging radars, resolution is determined significantly by the S/N.neufer wrote:Arecibo's big aperture was important for its signal to noise not for its resolving power.
The precision of each being determined by S/N.Radar resolution comes totally from a combination of temporal & frequency resolution of the returning radar pulse.
Only in theory. In practice, radar imaging of other planets at high resolution is only possible with very large aperture radio telescopes.With enough power and observation time a 10 meter radar dish could have done the same.
You are a true Renaissance man!neufer wrote:I'm a retired NOAA physicist & MIT grad with 4 grandchildren (2 nearby), 3 children (2 nearby) & a wife (1 nearby) .geckzilla wrote:
Art, despite all of your posting, I still have no idea who you are!
I have a home in Maryland but mostly reside at my 95 year old mother's house in Alexandria,Va. (about three blocks from where I grew up and walked to elementary school).
I have 8,500 posts at the Starship Asterisk*
but 27,000 posts at humanities.lit.authors.shakespeare
(so I gotta bita catchin' up to do).
http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?gallery_id=2&image_id=1056 wrote: <<This high-incidence angle image highlights a pair of newly named craters, Kobro and Komeda. Both craters exhibit prominent central peaks, and are located near Mercury's South Pole. Kobro crater, named for the Polish sculptor Katarzyna Kobro (1898-1951) is located near the center of the image, while Komeda, named for the Polish composer and musician Krysztof Komeda (1931-1969) is located just to the southeast. The craters are of approximately the same size, and appear to share a rim.
This image was acquired as part of MDIS's high-incidence-angle base map. The high-incidence-angle base map is a major mapping activity in MESSENGER's extended mission and complements the surface morphology base map of MESSENGER's primary mission that was acquired under generally more moderate incidence angles. High incidence angles, achieved when the Sun is near the horizon, result in long shadows that accentuate the small-scale topography of geologic features. The high-incidence-angle base map is being acquired with an average resolution of 200 meters/pixel.>>
