Astrophotography requires very long exposure times ( sometimes an hour or more ) to record faint objects on a photographic plate.

Astrophotography is a popular hobby among photographers and amateur astronomers.

Astrophotography and CCD imaging are also very popular.

Astrophotography is a large sub-discipline in amateur astronomy where it is usually used to record aesthetically pleasing images, rather than for scientific research, with a whole range of equipment and techniques dedicated to the activity.

Astrophotography uses specialised photographic film ( or usually a glass plate coated with photographic emulsion ), but there are a number of drawbacks, particularly a low quantum efficiency, of the order of 3 %, whereas CCDs can be tuned for a QE > 90 % in a narrow band.

Astrophotography, the photography of celestial objects, began in 1840 when John William Draper took an image of the Moon using the daguerreotype process.

Astrophotography is a specialized type of photography that entails recording images of astronomical objects and large areas of the night sky.

Orion Correlation Theory: The Giza pyramids ( in outline ) Superimposition | superimposed on an Astrophotography | astrophotograph of Orion's Belt.

* Capturing the Stars, Astrophotography by the Masters IC 1396A.

* Elephant's Trunk Nebula in IC1396 Paul Beskeen Astrophotography.

Russell Croman Astrophotography.

Astrophotography | Astrophotograph of Orion's Belt.

* NGC7331 at W. Kloehr Astrophotography

Labor relations have been transformed, income security has become a standardized feature of political platforms, and all the many facets of the American version of the welfare state have become part of the conventional wisdom.

The idea of national responsibility thus has become a common feature of the nations of the non-Soviet world.

Almost febrile in intensity, the principle has become worldwide in application -- unfortunately at the very time that nationalist fervors can wreak greatest harm.

The expression has become quite a cliche.

As capitalism in the 20th century has become increasingly dependent upon force and violence for its survival, the private detective is placed in a serious dilemma.

What is simply an opinion formed in defiance of the laws of human probability, whether or not it is later confirmed, has become by September of the election year `` a firm conviction ''.

At this point, of course, the issue has become complicated by a development unforeseen by Lappenberg and Kemble.

soyaburgers have replaced meat, and wood has become so precious that it is saved for expensive jewelry ; ;

Malraux, to be sure, does not abandon the world of violence, combat and sudden death which has become his hallmark as a creative artist, and which is the only world, apparently, in which his imagination can flame into life.

This has been his first encounter with mankind, and, although he has now become a legendary figure in the popular European press, it leaves him profoundly dissatisfied.

he has become Friday on Dragnet, a mouthpiece of arbitrary police authority.

The Nashville plan, incidentally, has become recognized as perhaps the most acceptable and thus the most practical to put into effect in the troubled South.

The second great dilemma has been the morality of nuclear testing, a dilemma which has suddenly become acute because of the present series of Soviet tests.

The second choice, full testing, has become even more risky just because the current Soviet tests have already dangerously contaminated the atmosphere.

For it is such a distinguished place, with such fine works of art and such a big library, that there can be little doubt but that the owner has become depraved by all this culture.

He has become in this half century the grand old man of American history.

This financial assistance from the state has become necessary because the local governments themselves found the property tax, or at least at the rates then existing, insufficient for their requirements.

With its history standing astride all but the very beginnings of the industrial revolution, Brown & Sharpe has become over the years a singular monument to the mechanical foresight of its founder, Joseph R. Brown, and a world-renowned synonym for precision and progress in metalworking technology.

This delightful tropical fruit has become well-known in the past thirty years because modern transportation methods have made it possible to ship avocados anywhere in the United States.

Boating has become a giant whose strides cover the entire nation from sea to shining sea.

With modern techniques of woodworking and the multitude of cutting tools, fixtures, and attachments available, the drill press has become a basic home workshop tool.

This covered, wooden bridge is so closely identified with the first action in the early morning of June 3, 1861, and with subsequent troop movements of both armies in the Philippi area that it has become a part and parcel of the war story.

The race problem has tended to obscure other, less emotional, issues which may fundamentally be even more divisive.

But in our case -- and neither my wife nor I have extreme views on integration, nor are we given to emotional outbursts -- the situation has ruined one or two valued friendships and come close to wrecking several more.

While the pattern is uneven, some having gained more than others, nationalism has in fact served the Western peoples well.

But it is more than irony: one of the main reasons why nationalism is no longer a tenable concept is because it has spread throughout the planet.

In a mere half-century the South has more than tripled its urban status.

Faulkner culminates the Southern legend perhaps more masterfully than it has ever been, or could ever be, done.

I believe that what I do has some effect on his actions and I have learned, in a way, to commune with drunks, but certainly my actions seem to resemble more nearly the performance of a rain dance than the carrying out of an experiment in physics.

The major effect of these advances appears to lie in the part they have played in the industrial revolution and in the tools which scientific understanding has given us to build and manipulate a more protective environment.

Even in domains where detailed and predictive understanding is still lacking, but where some explanations are possible, as with lightning and weather and earthquakes, the appropriate kind of human action has been more adequately indicated.

In fact, the recent warnings about the use of X-rays have introduced fears and ambiguities of action which now require more detailed understanding, and thus in this instance, science has momentarily aggravated our fears.

The Charles Men has a tremendous range of characters, of common folk even more than of major figures.

The fact that he has cast over those materials the light of a skeptical mind does not make him any the less Southern, I rather think, for the South has been no more solid than other regions except in the political and related areas where patronage and force and intimidation and fear may produce a surface uniformity.

It may be that in this comment he has broken from the conventional pattern more violently than in any other regard, for the treatment in his books is far removed from even the genial irony of Ellen Glasgow, who was the only important novelist before him to challenge the conventional picture of planter society.

Now this concern for the freedom of other peoples is the intellectual and spiritual cement which has allied us with more than forty other nations in a common defense effort.

The observer of television or other products for a mass audience has only a permit to be, like the models he sees, even more like everybody else.

The publication of Father Connolly's The Man Has Wings has made more of the group available in print so that a general picture of what it contained can now be had without difficulty.

My own stern hand has rent the ancient bond, And thereof shall the ending not have end: But not for me, that loved her, to be fond Lightly to please me with a newer friend Then hold it more than bravest-feathered song, That I affirm to thee, with heart of pride, I knew not what did to a friend belong Till I stood up, true friend, by thy true side ; ;

Everyone is more or less sceptical and virtually no one has been willing to accept Lappenberg or Kemble's position on that point.

Since the great flood of these dystopias has appeared only in the last twelve years, it seems fairly reasonable to assume that the chief impetus was the 1949 publication of Nineteen Eighty-Four, an assumption which is supported by the frequent echoes of such details as Room 101, along with education by conditioning from Brave New World, a book to which science-fiction writers may well have returned with new interest after reading the more powerful Orwell dystopia.

and we must attend to it more closely than has usually been done.

For the sad truth is that while one might write well without having read Bartleby The Scrivener, one is more likely, to write well if one has `` read it, and much else.

Actually it would be more accurate to say that the leader of the alliance now has swung fully behind the British policy of seeking to achieve a neutral Laos via the international bargaining table.

In 18 months, no more grisly incident has been reported from that jungle.

But preservation of the natural beauty of the Cape is of more than regional concern, for the automobile age has made it the recreation spot of people from all over the country.