© Norman Sperling, July 3, 2012
One of the very few benefits of being near-sighted is that fireworks look bigger and more resplendent. That's because the out-of-focus image spreads out over a lot more cone receptors in the retina.
If you're nearsighted, try watching fireworks without your glasses. You might like the show even more.
© Norman Sperling, June 29, 2012
Technology has now improved so much that a coordinated observing campaign can reveal important new data about one of the Moon's most important features: The Straight Wall.
First, data-mine all spacecraft observations, including Chinese and Indian. Face-on, sunlit views from spacecraft should be able to identify distinct layers. I haven't heard of anyone specifically researching these about the Straight Wall.
Monitor the Moon from Earth, using high-magnification, high-resolution imaging, especially of sunrise and sunset along the cliff. Use several widely separated instruments, so that there should always be at least one with good weather and the Moon high enough in its sky. This requires global coordination. That would have been very unusual 30 years ago, but is clearly possible now.
Extremely detailed sunrise and sunset animation sequences, from different librations, should reveal nearby faulting, or prove there isn't much.
Use the animations to map the slope and its component boulders. Precision measuring at sunrise and sunset, boulder by boulder, should determine elevation as well as latitude and longitude. I predict the boulders should be very large compared to Earth's talus slopes. That's because the rocks should be about as strong as similar Earth rocks, but the Moon's lower surface gravity exerts less force to break them up.
Spectral differences should distinguish between pieces from the top stratum and pieces from lower strata, hopefully corresponding to understandable mineralogical differences between strata. Infrared observing after sunset might reveal different cooling rates, further revealing differences between boulders.
Examining the buildup of dust at the bottom will tell something about dust scattering rates (such as by electrostatic levitation on the terminator) since landslides.
All this is possible with the latest generation of electronic imaging and enhancement. It's time to try.
© Norman Sperling, June 19, 2012
Several panels I was on at BayCon last month tried to advise aspiring writers. Panelists would cite something from a story and point out how saying things that way made problems. I, for example, advocated for short, active sentences instead of long, passive ones tangled up in prepositional phrases.
We heard examples from many different authors, writing in many different ways. All those stories got published! Several, which had aspects that panelists didn't like, pleased scads of readers, and therefore pleased publishers. So, I told the audience, even those undesirable forms can work. For example, many writers, including my friends Terry Dickinson and Robert Sheaffer, write very well in passive voice. Do what you think works best for your story, and for yourself as a writer.
by Albert B. Dickas. Mountain Press, Missoula, 2012. 978-0-87842-587-7. $24 softcover
review © Norman Sperling, June 11, 2012
Both for sight-seeing and for tutorials, this is a wonderful new book. It illustrates a great many important geological principles while providing glorious sights to see. Almost all of the sites can been visited by road. You'll find many settings of igneous, sedimentary, and metamorphic rocks (JIR spoofs those as ingenious, sentimental, and metaphoric).
Each selection has a 2-page spread: the left side tells coordinates, background, and what you can see. The right side presents 3 or 4 photos, cross-sections, maps, and/or development sequences. As in most cases where a publisher or designer dictates that all selections get equal space, both stories and typography may seem puffed or crammed.
Many places are within a half-day drive for most Americans. There's at least one in every state - one of the selection criteria. Just as in baseball's All-Star Game, where there has to be a player from every team, this promotes a number of less-important selections at the expense of better ones. Baseball depends on its fan-base, but people seeking superior geologic examples know perfectly well that they have to travel to see most of them. I hope the next edition abandons this criterion. Travelers will find concentrations of gem-quality sites easier to take in during reasonable excursions.
The author's illustrations and points are extremely clear. I found no typos, and only 5 minor mistakes.
The glossary, references, and index all have lots of entries, enabling a reader to pursue items. The glossary is a bit terse considering that many readers are novices. But it does distinguish, for example, between "terrain" ("A region of the Earth that is considered a physical feature, such as the Great Plains") and "terrane" ("A body of rock bounded by faults and characterized by a geologic history that differs from adjacent terranes"). It would be improved by listing all the examples in the book. The index probably doesn't list all occurrences of each term.
Whether you seek the newest or oldest rocks, or relics of ancient Gondwanaland or Rodinia, this book shows the way. These 101 geo-sites are well worth the trip for anyone interested in the more durable parts of Nature.