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Binoculars are devices that make small objects at a distance appear expanded and clear before your eyes. They are also known as binocular telescopes as they are basically two monocular placed together to allow perfect two-eye viewing. It is surprising to find that those objects, which are completely invisible to human eyes, appear so near and enlarged in the eyes of the binoculars.
Factors to consider while purchasing binoculars
When you want to choose the binoculars you should try them out and then purchase them. Although the enhanced image through binoculars might appear surprising, yet the working of binoculars is quite simple. You have the lenses at the end of the barrel called objective lens that gathers the light from distant objects and focuses it on the lens nearest to your eyes. With side-by-side two small telescopes fitted, the binoculars impart a great measure of depth of field, than single monocular glasses.
When you go to purchase binoculars you will be confused to hear two specific numbers “6 x30” or something similar. Do not get surprised. The first number always refer to the magnification power of the binoculars or how many times the image is magnified. This means that if the number is 6, the image that you view through the lens will be 6 times more magnified than its normal size.
However, the second number deals with the size of the objective lens at the end of the binoculars. You should know that the larger the diameter of the objective lens, the more light from the distant objects is attracted and the distant image can be viewed perfectly.
However, powerful the binocular is, you must be aware of the way to handle them. Holding the binoculars by the hand will be truly effective as shaking might make the magnification less useful. So if you are planning to use the binoculars for active activities, then get for yourself a pair of binoculars that has 4-7 times magnification. If your work demands using the binoculars in low light situation or indoors, then you should get larger objective lens with 30 power or above.
The weight of the binoculars should be considered before you purchase them. When you are using the binoculars for trekking, boating, fishing, or for astronomical purposes, you should see that the weight should not be very heavy. When you are going for these traveling purposes, you should plastic lens in binoculars that will help produce high quality and sharp image. Glass lenses can be available at lower cost but they are very fragile. So you should use plastic lens binoculars for better results.
Get a pair of binoculars to enjoy distant objects clearer and nearer to your eyes.
Binocular, Astronomy
The great observatories of the world are responsible for many of the prolific astronomical observations of the twentieth century.
Telescopic photograpy, radio dish data collection, and infrared imaging are among the many different techniques observatories have been able to employ to learn about the heavens.
The Palomar Observatory may be the most famous of all. With five telescopes operated by Cal-Tech’s graduate and post-doctoral students, the 200-inch Hale telescope is the most famous of all Palomar’s telescopes. Built in 1949, it was intended to overcome the onset of the southern California smog problem. Other noteworthy telescopes operated at Cal-Tech include a telescope to search for supernovae, a comet hunter, a trio of sky cameras looking for planetary and other celestial phenomena, an interferometer capable of detecting the slightest wobble in the orbits of a planet, and a sixty inch telescope responsible for spotting the first brown dwarf circling a companion star.
Cal Tech is also directly involved in the operation of the Keck and Lick Observatories. The Keck Observatory, located on top of Hawaii’s dormant Mauna Kea volcano contains the world’s largest optical and infrared telescopes. Its twin Keck telescopes stand eight stories high and weigh 300 tons each. Lick Observatory is located on 4200 foot Mount Hamilton east of San Jose, California. It contains nine research telescopes with the largest being the Shane 3-meter Reflector. This telescope is used to observe everything from our local solar system to faraway galaxies.
The Griffith Observatory in Los Angeles is known for its12-inch Zeiss Refracting telescope. This telescope’s fame is largely due to the fact that it has been used to allow public viewing of the universe since 1935. More than five million people have looked through its lenses since under the guidance of experienced Telescope Demonstrators. The Griffith Observatory was also known for its laserium light shows in previous years although they have been discontinued at present.
The Hayden Planetarium in Boston is more than just a planetarium. It is also a museum. Along with its Gilliland Observatory, laser-light shows and a rotating star simulator are among some of the different multi-media astronomical experiences available to the public.
The Greenwich Observatory in Cambridge, England was established in 1675 by King Charles II in order partially to fix longitude readings. It currently fixes the origin of the worldwide time reference point of Greenwich Mean Time. An observatory in Portland Maine is being restored as a famous architectural monument. Another observatory of note is the University of Chicago’s Yerkes Observatory with its five telescopes.
All of these observatories have added to the vast array of knowledge now known about the universe. Their importance to the history of astronomy, as well as their continuing usefulness, can not be overemphasized.
1) Palomar observed: For more than 50 years, science above and beyond; Scott LaFee; San Diego Union Tribune; November 2, 2005
2) CalTech Astronomy Website;
3) UC Observatories Website
4) Yerkes Observatory Website;
5) Griffith Observatory Website;
6) Observatory view worth preserving; by John Alphonse.
7) Hayden Planetarium Website.
8) The Astronomical Society of Edinburgh: A Guide to Edinburgh's Popular Observatory
No matter how you spell it – black hole or blackhole – you know what you’re referring to…or don’t you? Let all your questions be answered as you read on.
Why Should You Study about Blackholes?
Blackholes are one of the strangest theories put forward by scientists but they’re one of the most interesting as well. If you’re looking for a scientific matter that won’t put you to sleep, a blackhole is definitely one of them. Also, if you’re experiencing difficulties understanding the laws of gravity, blackholes will allow you a clearer – albeit more terrifying in some context – understanding of how gravity works. And lastly, if you’re still torn up between the Big Bang theory and the biblical version of creation, the theory of blackholes will put all your doubts to rest.
What are Blackholes?
If you recall your old lessons on Greek mythology, you probably know the two terrors of the seas, Scylla and Charybdis, and which Greek sailors are extremely afraid of. Scylla was a monster that threatened anything and anyone that was within its reach while Charybdis took shape of a massive mouth creating whirlpools and causing people and ships to sink into oblivion. A blackhole isn't a Scylla, but it’s definitely close to a Charybdis.
A blackhole is an incredibly vast region of blackness or nether space. This region contains an inordinate amount of mass, and because of this, anything that’s within its orbit will be sucked in because of the pull of gravity.
And before you start questioning once more about the mechanics of gravity and just what the heck Albert Einstein was talking about, here’s how to understand blackholes…and gravity.
Think of throwing a rock up in the air. It will go up for a short period of time before descending. Now, let’s say that you have enough speed and force to throw the rock in the air and defeat the pull of gravity of Earth. This amount of speed and force is called escape velocity. Escape velocity is directly proportional to the mass of the planet or object. Escape velocity, however, is also affected by the distance of the object from the gravitational center of the region.
Weight is different from mass. That’s why, in Galileo’s experiment, two different objects still fell to the ground in the same time. So when you’re considering the pull of gravity, you should think about the region’s mass and not the weight of the object.
So let’s go back to blackholes. A blackhole, because its mass is so much greater than its size, has an incredibly powerful gravitational pull. And that’s why everything that comes near it will get sucked in with no chance of escape.
How is a Blackhole Formed?
A blackhole has a definite origin, but it’s still unknown whether it has a definite end. A blackhole is born from stars or any other enormous space object. Stars live for thousands and thousands of years, but they die eventually. Nuclear fusion exists within stars and these produce electromagnetic radiation. As a star becomes older, the power that’s behind its nuclear fusion decreases in proportion. When its source of power is completely used up, electromagnetic radiation naturally goes down as well and consequently causing the star to collapse. If it has adequate size and mass, it will become a blackhole. If has insufficient size or mass, it will end up a neutron or dwarf star, and a good example of the latter is Pluto, which has been demoted from its previous ranking as a planet.
Getting Sucked in a Blackhole
Almost everyone who has studied about blackholes are interested in knowing their fate if they were unlucky enough to fall into one. If that’s what you want to know as well as prepare for your future.
Let’s say that you actually have the means of going into space but you’re unfortunate enough to fall into a blackhole. Upon physically entering the region of blackness, your body will also enter a state of weightlessness, and it’s like feeling that you’re as light as a feather. As you go deeper, however, you’ll feel that you’re slowly being stretched. This feeling will continue stretching and stretching until you’re finally stretched into several pieces.
And that of course spells your end…and this discussion.
Galaxies, the cosmos, astrophysics, observatories, telescopes: How do we possibly comprehend the reality that the universe is beyond measure, infinite, and endlessly mesmerizing?
We can't; that's why astronomy remains so completely fascinating. It's the things in life we do not understand that most often draw our interest; that's simply a natural human impulse -- to be curious, to wonder and to want to be in awe of something far beyond and outside ourselves.
We know that stars, like everything else, live and die and that there are scientifically "correct" patterns in the remote sky that both perplex and bewitch us. If astronomy fascinates, it is because there exists in everyone a profound empathy with a world that is inaccessible in its complexity. Who among us has not felt, even fleetingly, spellbound by the immensity of this cosmos, this universe?
Modern observatories regularly function as educational centers, providing this feeling of entrancement by presenting the wonder of the cosmos directly to the audience, short-circuiting the intellect for an hour or so and uncovering the wonder at the magic of theuniverse; promoting a sensory, visceral feeling for the human condition and its place in the great book of the cosmos.
Astronomy, the science of stars, planets, galaxies, and black holes, is the oldest science, yet it is the most intriguing because the study of the universe will help answer the most important questions human beings can ask, such as:
How did the universe begin?
What is the structure of the universe?
How will the universe change in the future?
How do the planet Earth and its inhabitants fit into the larger universe of space and time?
Though we may never know the answers to these kinds of questions in our lifetime, we're always thankful for those who will follow us, prepared, with a scientific brain, to one day provide answers -- and maybe more -- to humankind.
It's difficult to understand our own galaxy, and we're constantly "adding to it," or discovering new frontiers and small, more distant planets than those we're already familiar with. The sun, and the concept of the planets just in our galaxy alone, provoke wonder and all kinds of speculation. It's food for our brain; it's one of those applications of learning that so enthrall, it doesn't seem like we're "studying" anything. It's an effortless exercise in the Unknown Sphere of the Universe.
What better way to pass the time, to postulate upon, to have an intellectually stimulating discussion, maybe with people you don't even know yet?
And what about the theories of particle physics that have been developed in conjunction with the standard Big Bang model to explain the origin, evolution and
present structure of the universe?
What about the origins, evolution, interiors, and energy production of the stars themselves? How are they formed? Why? And we've all heard of "interacting galaxies," but just what, exactly, does it mean? It all sounds like, well, a kind of heaven -- a place we know exists, but that we cannot quite see or understand.
Then, there's Newton's laws, the concept of work and energy, momentum, gravitation, sound and light waves.
If you haven't felt a slight thrill yet, it's eitherbecause you already know about these atmospheric wonders, or you've been living under a local rock.
So get out there and Observe the Universe! It's absolutely spellbinding!
What are the best sights for astronomy? That's hard to say. There is so much out there that the determination of what are the best sights for astronomy probably requires you to do some advance study and decide for yourself what you'd like to learn about.
There are a couple of very helpful books that can guide you through a determination of what are the best views for astronomy.
A new beginner or intermediate handbook for stargazers is the "Guide to Stars and Planets" by Patrick Moore. This accomplished astronomer has concisely gathered reference information on the night sky that details the best views for astronomy. It looks at the moon as well as the various constellations. You'll find charts, photographs and maps that have been garnered through study with earth bound and space telescopes. The best areas for astronomy are laid out in this book as well as some guidance on how you're going to take a look at the best views for astronomy yourself.
Here you'll find guidance on what telescope to buy, how to set up an observatory for yourself as home and how to become a good amateur astronomer. Details about the perfect sights for astronomy include information on the moon, our sun, the various planets, the debris found in the solar system, a myriad number of stars, the various galaxies we know about, the constellations, and comets, asteroids, meteors and eclipses that humans have noted and photographed in the past.
The best sights for astronomy have been highlighted in the book, including important features in the moon and the stars we've studied extensively.
One of the most important telescopes in the history of astronomy, the Hubble telescope has allowed observers to peer farther into space than any previous telescope.
By moving outside and above the atmosphere of the earth, the Hubble telescope has been able to observe visual data much more clearly than a terrestrial telescope, and it has been able to see much farther into the ultraviolet and infrared spectrums as well, since these spectra are largely absorbed by the earth’s atmosphere. Thus, by moving the observing platform into open space, the Hubble telescope has given a much clearer view of the universe, allowing scientists to peer even deeper into space.
The Hubble telescope is named for Edwin Hubble, the astronomer who originally determined that the universe is expanding. This discovery, one of the foundations of modern astronomy and cosmology, made Hubble an excellent choice for the honor of having this telescope named for him.
The concept for the Hubble telescope was originally the idea of Lyman Spitzer back in 1946. He clearly saw that earth-based telescopes were inherently limited in their ability to see into the heavens, since dust, clouds, and even turbulence in the atmosphere interfered with telescopes’ clarity. Which meant that the best way to get a clear image from a telescope was with a telescope that was in orbit around the earth.
After some success with the smaller Orbiting Astronomical Observatory, the plan for a large scale telescope was born. There were some fits and starts however, mostly due to budget constraints, and the project did not really take off until the 1970’s and funding was not approved until 1978. Then, with funding in place, plans were made to launch the Hubble telescope in 1983. However, due to various delays, it was not actually launched until 1990.
After a few early problems, the Hubble telescope finally started sending back clear images. And those images were well worth the effort. The Hubble telescope was able to achieve a sharpness and resolution that was unimaginable with a standard, earth-bound telescope; crisp images that not only showed new detail in known areas of space, but also peered deeper into space than ever before. And with these new images, astronomers have been able to discover new and exciting information about our universe.
However, it is not only astronomers who have been amazed at the images that the Hubble telescope has produced. In fact, the images from Hubble are delights to view all on their own. From the clearly defined galaxies, to pictures of nebulae, to the Apollo 15 landing site, Hubble has been as exciting for the public as it has been for scientists.
As the Hubble telescope ages, its future is uncertain. Corrective software has allowed earth-based telescopes to pick up much of the information previously possible only with a space-based telescope. And as NASA retools itself to follow its mandate to take a man to Mars, money that would be spent on maintenance of the Hubble is being spent elsewhere. However, before the Hubble telescope enters the atmosphere sometime in 2010, it will provide a remarkable window into the universe and all that is in it.
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