World Wide SETI

There are many different types of telescopes, besides many different makes, and these different sorts are manufactured to perform different duties. Therefore, before leaping in and buying a telescope you have to learn how to buy a telescope first.

However, you can cut out a lot of futile searching and comparing if you can answer two vital questions before you begin, namely: what do you want the telescope for and how much can you afford to spend?

In many ways, it is best to start with a quite simple telescope, realize what its failings are for what you would like a telescope for and then trade up into the right sort of telescope. Another decent manner to start is with a pair of binoculars and then purchase a telescope that suits your interests. Binoculars will disclose a great deal more that the naked eye – it is quite surprising how much.

If you would like to use your optical aid for a number of purposes such as bird-watching and astronomy, then binoculars are almost certainly the answer until you choose to specialize in astronomy, when you can get a telescope dedicated to that hobby and its tremendous distances.

The eyepiece is the most vital part of a telescope and you will want one with adjustable magnification. The quality of this lens is vital: the view through it ought to be crisp and clear with very little to no chromatic aberration. Chromatic aberration is a form of colour distortion that manifests itself as halos around outstandingly bright lights.

Knowing where you will be utilizing your telescope is also important, because of adverse factors in cities. The skies over cities are frequently polluted with contaminants like smoke or smog, but they are always polluted with street light. This street light pollution can be a real nuisance, so ask if your telescope can be fitted with filters to mask out these pollutants.

A telescope has to collect light in order for you to see through it. This is accomplished by the primary lens and the amount of light that the telescope collects is in direct proportion to the size of this primary lens or objective. If you would like more light, you need an objective with a larger surface area.

Light is needed more than magnification sometimes, particularly while looking at the stars because of the distances concerned. It actually scarcely matters whether you are magnifying a star 10 or 12 times when it is 1,000 light years away. However, what you can see, you need to be able to see clearly.

Too much magnification can make directing the telescope very difficult for novices unless there is a ‘sight’. This is a weaker lens outside the prime telescope that makes it easier to direct at the item that you want to look at.

It is not possible to cover all the aspects of purchasing your first star-gazing telescope in a short piece, so be prepared to do some more research.

Owen Jones, the writer of this piece, writes on a variety of subjects, but is now involved with the kids building set. If you would like to know more, please visit our website at Smart Toys for Kids.

The first time that you gaze up into the night sky and feel the marvel of the universe is the time when most people, even the most revered professional astronomers, think back to if they think about their early interest in the stars. It is usually a very special moment, when an adult led you by the hand, pointed at the sky and said: ‘Look, that is the Pole Star’.

Country folk will almost certainly discover the night sky at an earlier time than city dwellers because the atmosphere above a city is normally so polluted that you cannot see the stars from below. There are two kinds of pollutants that prevent you from seeing the stars in a city, smoke and light. Street lights give off a corona that prevents you from seeing the weaker light from the stars beyond.

If you want to evoke that instant in your life, why not take a child out into the country to look at the stars one night? If you have a pair of binoculars, so much the better, but they are not vital. If you have forgotten which stars are which, take a book on the topic or a map of the night sky. These days you can download a map of the night’s sky for the day that you want.

The night sky actually changes every night. The stars and the constellations do not move much, so you should not have too much difficulty finding them, but if a planet is passing by, it will be in a different part of the sky each night, which is why it is helpful to get an up-to-date map of the night sky for the date you want to go star gazing.

One of the hardest concepts for a child (or anyone else for that matter to grasp is the magnitude of the universe – the sheer size of it. Here are a couple of facts that will amaze most individuals:

1] Our Sun is a star in the galaxy called the Milky Way and it has its own planets revolving around it. However, there are estimated to be 100,000,000,000 (one hundred billion) stars similar to our Sun in the Milky Way.

2] The Milky Way is one of approximately tens of billions of galaxies in the universe and the Milky Way is one of the smaller galaxies.

3] It would take over 100,000 years to go from one edge of the Milky Way to the other, if you were travelling at more than five trillion miles per year or more than 570 billion miles per hour.

4] It has been calculated that our Milky Way is 14,000,000,000 (fourteen billion) years old

It is very hard to comprehend astronomical numbers like this but this might help:

1 billion seconds ago, it was 1980

1 billion minutes ago, Jesus had only just passed away

1 billion hours ago, mankind was not yet on the planet

Owen Jones, the writer of this piece, writes on a number of subjects, but is now involved with the kids building set. If you would like to know more, please visit our website at Smart Toys for Kids.