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Identify Stars by Catalog Designations

Robert Bruce Thompson O'Reilly Media PDF

HACK

#15

Identify Stars by Catalog Designations

Table 2-2. Common names and pronunciations of important stars (continued)

Constellation

Principal stars

Scorpius

Akrab (AWK-rob, also known as Graffias, GRAFF-ee-us),

Antares (an-TAR-eez, an-TAIR-eez), Dschubba (JOO-buh), Lesath

(LESS-uth, LAY-soth), Shaula (SHAH-luh)

Taurus

Aldebaran (al-DEB-uh-ron), Elnath (EL-nuth)

Triangulum

Metallah (meh-TAHL-uh)

Ursa Major

Alcor (al-CORE), Alioth (al-YAHT, AL-ee-oth), Alkaid (al-KAH-id or al-KADE), Dubhe

(DUB-uh, DOOB-uh), Megrez (MEG-grez), Merak (MER-awk),

Mizar (mi-ZAHR, MYE-zahr), Phad (FAD, also known as Phecda, FECK-duh),

Talitha (TAH-lith-ah)

Ursa Minor

Kochab (KOE-cab), Pherkad (FUR-cahd), Polaris (puh-LAIR-us)

Virgo

Porrima (POR-rim-uh, poh-RIM-uh), Spica (SPEE-kuh, SPY-kuh),

Vindemiatrix (vin-duh-MEE-uh-trix)

It’s important to know common star names because you’ll routinely need to know them when you point out objects to another observer (or vice versa), when you align a go-to scope, and for other common activities. It’s important to pronounce the names properly to avoid looking like a complete newbie, regardless of how experienced you may be. You needn’t learn all of the common star names, nor even all of those listed in Table 2-2. But it does help to learn the few dozen names shown in italic. The best way to learn them is to memorize the named stars in each constellation as you study or work that constellation.

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Medium 9780253353139

Limberlost

Scott Russell Sanders Indiana University Press ePub

It is my belief that to do strong work any writer
must stick to the things he truly knows, the simple,
common things of life as he has lived them.
So I stick to Indiana.

—GENE STRATTON-PORTER

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Medium 9780596100605

Please Be Seated

Robert Bruce Thompson O'Reilly Media PDF

HACK

#60

Please Be Seated

Specialty Filters

Various specialty filters exist that have even more narrowly defined uses than the H-Beta filter. For example, the Parks/Lumicon Swan-Band Comet filter is for observing comets, period. Its passband includes the cyanogen lines and the 501 nm O-III line, but not the 496 nm O-III line. This filter is useless unless you observe comets; if you do, it’s very useful indeed.

Dedicated amateur astronomer Al Misiuk also happens to be an expert on interference coatings. He formed a company named Sirius Optics (http:// www.siriusoptics.com), which produces various specialized interference filters. The first project Al took on was making a filter to improve the false color generated by achromatic refractors when viewing bright objects. Traditionally, astronomers used a yellow filter to reduce this blue-violet haze, but the transmission characteristics of Wratten color filters are not ideal for this purpose. The Sirius Optics MV-1 (minus violet) interference filter eliminates most false color while imparting only a mild greenish-yellow cast. The enhanced Neodymium Eyepiece Filter combines MV-1 interference coatings with neodymium optical glass to provide an almost completely neutral image. The MARS 2003 filter is an interference filter optimized for (you guessed it) Mars, although it is also useful on some other objects. The NIR1

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Medium 9781771870849

The Heart of the Matter

Ratzlaff, Lloyd Thistledown Press ePub

]>

This is the marvel of the play of forces, that they so serve the things wherethrough they flow:

growing in roots to dwindle in the tree-trunks, and in the crowns like resurrection show.

— Rainer Maria Rilke

ON A MIDSUMMER EVENING, I pause in the Pioneer Cemetery at the southern fringe of the city, to rest a while beside the sleeping colonists. Bees are busy — but sound drowsy — in a maze of fescue and wild rose bushes nearby, and across the river a scarlet sun waits to be tucked under the rim by the Holy Ghost’s white feathers.

City traffic frets the avenue on one side of the field; and on another, a train crosses the trestle on the South Saskatchewan, and rumbles off toward the east. In this tract of naked prairie, maintained as an historic site, one hundred and forty-four souls — a third of them infants — are buried on the river’s brink under the open sky. They are the founders of the temperance colony that grew to be the city of Saskatoon.

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Medium 9781603449519

5. The Cow: Livestock and White-Tailed Deer Habitat

Timothy E. Fulbright Texas A&M University Press ePub

5

The Cow: Livestock and White-Tailed Deer Habitat

KEY CONCEPTS

▼ Cattle grazing can reduce grass cover and increase forbs in productive plant communities dominated by mid- to tall grasses, but whether or not the increase in forbs may result in improved deer nutritional status or productivity is unclear.

▼ Cattle grazing during winter may reduce forage available to deer, even at moderate stocking rates.

▼ As a general rule, rangelands dominated by native vegetation and grazed by domestic livestock should be managed so that livestock consume 25 percent or less of annual production of herbaceous vegetation to avoid degradation of white-tailed deer habitat and to minimize diet overlap between livestock and deer.

▼ Introduction of exotic deer species is a threat to white-tailed deer populations because exotics are highly competitive with white-tailed deer and can potentially displace them.

Livestock Grazing and Deer

Most rangelands are grazed by domestic animals, although in recent years livestock have been removed on some private ranches in Texas. About 20 percent of respondents in a recent survey of landowners and hunting lessees in South Texas said livestock have not grazed their lease or ranch in the past three years (Bryant, Ortega-S., and Synatzske, n.d.). Contrasting viewpoints exist among natural resources managers in regard to cattle grazing and white-tailed deer. Aldo Leopold (1933) espoused the view that cattle can be used as a tool to improve deer habitat, although he cautioned that livestock grazing can also destroy habitat. Another, similar view is that cattle grazing and deer are complementary and grazing the two together is more efficient use of rangeland. A third view is that livestock grazing is simply destructive to wildlife habitat. An overall goal of this chapter is to present what is known from the scientific literature regarding livestock grazing and white-tailed deer and allow readers to follow the chain of evidence to develop, change, or reinforce their own view on the topic. Our interpretation of the relevant literature is that production of livestock and of white-tailed deer are compatible land uses only when numbers of each are properly adjusted based on available forage. We focus on seven aspects of livestock grazing in this chapter: (1) diet overlap between deer and livestock; (2) effects of livestock grazing on plant communities; (3) social interactions between deer and livestock; (4) grazing systems and deer; (5) calculation of correct cattle stocking rates to benefit deer habitat; (6) livestock water developments, such as earthen stock ponds, and fencing; and (7) effects of grazing on predation on deer. The effect of exotic ungulates on white-tailed deer is a topic related to livestock grazing. Continued introduction and increase of exotic deer and other ungulates may negatively impact white-tailed deer populations.

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Medium 9780253000958

Buckeye

Scott Russell Sanders Indiana University Press ePub

Years after my father’s heart quit, I keep in a wooden box on my desk the two buckeyes that were in his pocket when he died. Once the size of plums, the brown seeds are shriveled now, hollow, hard as pebbles, yet they still gleam from the polish of his hands. He used to reach for them in his overalls or suit pants and click them together, or he would draw them out, cupped in his palm, and twirl them with his blunt carpenter’s fingers, all the while humming snatches of old tunes.

“Do you really believe buckeyes keep off arthritis?” I asked him more than once.

He would flex his hands and say, “I do so far.”

My father never paid much heed to pain. Near the end, when his worn knee often slipped out of joint, he would pound it back in place with a rubber mallet. If a splinter worked into his flesh beyond the reach of tweezers, he would heat the blade of his knife over a cigarette lighter and slice through the skin. He sought to ward off arthritis not because he feared pain but because he lived through his hands, and he dreaded the swelling of knuckles, the stiffening of fingers. What use would he be if he could no longer hold a hammer or guide a plow? When he was a boy he had known farmers not yet forty years old whose hands had curled into claws, men so crippled up they could not tie their own shoes, could not sign their names.

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Medium 9780253011824

9 Home by the Sea: A Closer Look

John Foster Indiana University Press ePub

9.1. Generalized model of factors contributing to Burgess Shale–type preservation, based in part on the Wheeler and Burgess Shale formations.

Based on data in Gaines and Droser (2005); Gaines, Briggs, and Zhao (2008); Gaines, Hammerlund, Hou, et al. (2012); Gaines, Droser, Orr, et al. (2012).

THE CAMBRIAN PERIOD MAY BE MANY THINGS, BUT MORE THAN anything it is a goldmine of information regarding how our modern biological world got underway. Times have changed since the days of Anomalocaris. The cast of characters in the oceans has changed in the details, and the ecological functioning of the entire marine realm has increased in its complexity, but the roots of the modern biota and the biota’s modes of interaction lie in the eruption of life that occurred between the first appearance of a complex trace fossil around 542 million years ago and that of a particular species of a toothy and eel-shaped member of our own phylum about 488 million years ago. This interval, the Cambrian period we know and love, may be considered a 54-million-year key moment in the biological history of Earth. Although the Cambrian accounts for only about 1.2% of Earth history, and although by far most of our planet’s history has consisted of the very different world of the Precambrian, this Cambrian 1/100th of our story set the stage for the next couple hundred million years and, importantly for us, the world we know around us today.

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Medium 9780870818462

3. RISK

Kevin Holdsworth University Press of Colorado ePub

The ambulance that carried Whitey to the hospital

was operated by the same firm that ran

our town’s funeral home and crematory,

a coincidence that might have made him nervous,

but Whitey was already too-far-gone, rolling on

to hog heaven now, above the black and orange clouds,

his skull too full for impact, set to burst;

he downshifted into sky Sturgis for the final time.

The deer he’d missed browsed placidly

on the scrub-brush slopes beneath White Mountain,

the one he’d tagged lay smeared in bits and pieces,

dragged off the road by Officer Staples, lights flashing.

Lord, that busted up Sportster, Staples noted,

was as sad a sight as a bloated range bull,

or a dead moose, or a road-killed owl or eagle,

all strewn against the trapeze fence.

He walked the red sea roadside

but found no skid marks on the pavement

and nothing left to salvage.

We all knew Whitey liked to ride too fast—

he boasted road-rash tattoos, close calls aplenty,

but when he broadsided that hapless bambi,

his velocity must have carried him straight through it,

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Medium 9780253007896

1952 Port or Park: Dreams in Dissonance

Kenneth J. Schoon Quarry Books ePub

Plans to establish a public deepwater port on Lake Michigan predate Indiana’s statehood. It was this early Hoosier dream that resulted in the state boundary line (today at Indian Boundary Road) being moved from the southern tip of Lake Michigan to a line ten miles north of that.

Fur trader Joseph Bailly planned for a Porter County port in the early 1830s. As noted elsewhere in this book, the citizens of City West in 1837 lobbied Daniel Webster for funds to build a port. The dredging of Burns Ditch in 1926 for flood relief sparked new efforts to create a public port. However, efforts stalled again once the Great Depression took hold.

In Porter County, Inland Steel owned a mile of lakefront between Miller and Ogden Dunes. Since 1929, Midwest Steel had owned 750 acres straddling Burns Ditch. Midwest executives and many Porter County businessmen were hoping that the federal government would build a deepwater port at the ditch. But the Army Corps of Engineers in both 1931 and 1935 rejected that idea because it would benefit just that one company.

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Medium 9780596100605

Protect Your Night Vision from Local Lights

Robert Bruce Thompson O'Reilly Media PDF

HACK

Protect Your Night Vision from Local Lights

A bright red light destroys night vision. Red light preserves dark adaptation for a simple reason. The rhodopsin pigment in rods is completely insensitive to light at wavelengths longer than about 620 nm, which is to say deep red.

Although the erythrolabe dye present in your L cones has peak sensitivity near 564 nm, its sensitivity extends far into the red part of the spectrum.

That means you can use a very bright red light without damaging your scotopic vision at all.

This is an excellent reason to use a red LED flashlight rather than a standard flashlight with a red filter. LED flashlights emit light at one specific wavelength, and red LED flashlights emit at a wavelength to which rhodopsin is insensitive. Red filters, on the other hand, also transmit a fair amount at light at shorter wavelengths, so a bright red-filtered flashlight can impair your night vision.

Interestingly, rhodopsin sensitivity peaks very close to the

486 nm H-Beta and 496/501 nm O-III lines emitted by many nebulae. Were it not for this coincidence, many faint fuzzies would be even fainter.

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Medium 9781771870849

To See In a Sacred Manner

Ratzlaff, Lloyd Thistledown Press ePub

]>

But let not revelation by theses be detained.

— Emily Dickinson

WHEN BLACK ELK WAS AN OLD MAN, he recounted a dream he’d had at the age of nine, and said of this experience: “I saw more than I can tell, and I understood more than I saw, for I was seeing in a sacred manner the shapes of all things in the spirit, and the shape of all shapes as they must live together like one being. And I saw that it was holy.”

The boy was very ill at the time of his dream; but while those around him feared for his life, he was spirited into a world of wheeling horses and flowering trees, of ceremonial hoops and ritual pipes. And he saw a tepee with a rainbow door, and inside were six grandfathers whom he recognized at once to be the Powers of the world.

When the lad’s quaking had subsided, the apparitions began to speak. The sixth grandfather, the spirit of the Earth, had long, white hair, and a wrinkled face with eyes that were deep and dim; yet he seemed vaguely familiar. As the boy stared, the old face began transforming itself backward through time, shedding its years until it reached childhood; and Black Elk saw that it was himself, “with all the years that would be mine at last.” And when the spirit had grown old again, it said, “My boy, have courage, for my power shall be yours, and you shall need it.”

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Medium 9781771870801

CHE AMONG THE COTONEASTERS

Forrie, Allan Thistledown Press ePub
“Che Among the Cotoneasters” is a call to arms to bring landscape architecture to the masses. Though Don Gayton muses that “building a garden is a bit like building your own house while you live in it,” he encourages the reader to recognize the delicate balance struck between biology, geology, climate, and culture that is found in gardening.
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Medium 9780253000958

Beauty

Scott Russell Sanders Indiana University Press ePub

In memory, I wait beside Eva in the vestibule of the church to play my bit part as father of the bride. She is supposed to remain hidden from the congregation until her queenly entrance, but in her eagerness to see what’s going on up front she leans forward to peek around the edge of the half-closed door. The satin roses appliquéd to her gown catch the light as she moves, and the toes of her pale silk shoes peep out from beneath the hem. The flower girls watch her every motion. Twins a few days shy of their third birthday, they flounce their unaccustomed frilly skirts, twirl their bouquets, and stare with wide eyes down the great length of carpet leading through the avenue of murmuring people.

Eva hooks a hand on my elbow while the three bridesmaids fuss over her, fixing the gauzy veil, spreading the long ivory train of her gown, tucking into her bun a loose strand of hair, which glows the color of honey filled with sunlight. Clumsy in my rented finery—patent leather shoes that are a size too small and starched shirt and stiff black tuxedo—I stand among these gorgeous women like a crow among doves. I realize they are gorgeous not because they carry bouquets or wear silk dresses, but because the festival of marriage has slowed time down until any fool can see their glory.

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Medium 9780892727834

MID-COAST

Bob Duchesne Down East Books ePub

The Mid-Coast region represents the

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Medium 9781574412826

III. Wetland Birds, Associated with Riparian, Coastal or Prairie Habitats

Ricardo Rozzi and collaborators University of North Texas Press PDF

WETLAND BIRDS

Chéketej

Challwafe üñüm

Martín pescador

Ringed Kingfisher

CD 1 / Track 15

Ceryle torquata, formerly classified as Megaceryle (great = Gk. megas; kingfisher= Gk. ceryle) torquata, is the largest South American kingfisher, and it is the only one that reaches subpolar latitudes. Its distribution spans from Texas and Arizona in southern United States to Cape Horn in southern South America, where it receives the Yahgan name of chéketej.

It is a conspicuously colored species with an elegant white collar and a blue crest, especially marked in the male. It possesses a long, strong beak that permits it to catch fish in rivers, lakes, channels and fjords of the extreme south. It is frequently observed perched on branches or rocks that overhang rivers or the shoreline. On these, the Ringed Kingfisher waits for the appearance of marine and freshwater fish, crustaceans and larvae that it hunts on the surface of the water or by plunging itself into it. When it notices danger, it sweeps back and forth in the air, emitting its strong, repetitive calls kekereke- kekereke- kekereke.

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