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  • eblogger 3:35 am on February 10, 2010 Permalink | Reply
    Tags: short articles   

    The Basics Of Buying A Telescope 

    There is a moment in the life of any aspiring astronomer that it is time to buy that first telescope. It’s exciting to think about setting up your own viewing station whether that is on the deck of your home or having a powerful but mobile telescope set up to take to the remove countryside to really get a good shot at some breath taking star gazing.

    The last thing we would want to do is to take away any of the “fun” of your hobby of astronomy because the joy of what we do as star gazers is a big part of the appeal. But unlike many other hobbies, ours is a passion of science, of learning and of discovery. And don’t kid yourself, even a hobbyist with a limited telescopic set up can see some amazing things in the stars. So let’s be sure you invest in a solid piece of equipment that you can continue to grow with as your knowledge and ability as an astronomer grows. But how do we do that?

    Meet the Geeks.
    Now we use the term “telescope geeks” lovingly because any of us who are devoted to our love of astronomy eventually become telescope geeks. And these are the type of people who will know exactly how to evaluate your needs in terms of where you are right now and where you want to go as your hobby grows with you. So if you have not yet associated with a local astronomy club, now is the time to do it.

    Start rubbing elbows with people who live and breathe telescopes. Their input is a hundred times more reliable than what a sales brochure or that salesman might have to say because the “telescope geeks” have been where you are, made the mistakes and are eager to help you avoid those same mistakes.

    Size Matters
    In the world of telescopes, the sales people see, to try to baffle us with all the bells and whistles of their hottest selling model. One of the big check points that is often pushed is the amplification level of the telescope lens. While that is a factor that is worth noting, when it comes to a telescope lens, the old phrase “size matters” is a good guideline.

    Just remember that your telescope lens works best when it takes in the most light it can from the object you are viewing. So the wider the diameter of the lens, the better a view you are going to get. So don’t fall for the amplification level only. Carefully evaluate the lens size so you have the right fit for what you want to do.

    It Has to Stand on Its Own Feet.
    If you are going to set up a permanent telescope station, then you can bolt the unit down so it is well supported. But many of us have to take our telescopes out into the country for optimum use. So the stand has to be strong and flexible so we can set up the telescope on uneven turf but still feel secure that this important and expensive piece of equipment is going to stand on its own without fear of it falling during our observation time.

    We already mentioned strong and flexible as evaluation guides for the telescope stand but add in ease of use as well. You have to be able to set your telescope up and break it down quickly and easily when you are on a remote viewing. You may even find yourself setting up or taking down your telescope in the dark or by lantern or flashlight if you are taking advantage of the great star displays in the late night sky that make this hobby so exciting.

    These are the basics of what to look for in your new telescope. Finally, make sure the telescope can be enhanced and expanded without having to throw the first unit away and buy something completely new. You want your telescope to grow as your knowledge and skills grow. If your first telescope meets all of these requirements, you are off on the right foot on a long and enjoyable career as an amateur astronomer.

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  • eblogger 11:55 pm on January 31, 2010 Permalink | Reply
    Tags: astronomy facts   

    Astronomy Facts – An Overview 

    How many astronomy fact can you think of? Consider that there are somewhere around 1 x 10 ^22 stars in the universe, that’s a one followed by 22 zeros. Then consider that many of those stars have planets surrounding them. Then consider all the moons that orbit the planets, the comets and asteroids, the galaxies these stars form, the nebulae and black holes and everything else out there. It’s a lot to consider. This article, which presents astronomy facts, certainly won’t contain every fact. Walked is here, however, is interesting.

    The data on the brightest star as seen from Earth are good astronomy facts. The son, about 250,000 times closer than the next star, isn’t counted here. We get so much light from the sun that when it shines none of the other stars can be seen. Keep in mind that in the scale for the magnitudes given, lower numbers are brighter. The son is approximately 26.73, with the full moon weighing in at -12.6. And now to the top five.

    #5 is the Arabic word for eagle or vulture, Vega. This star has a magnitude of .03, and is 25 light-years from Earth. When looking at these astronomy facts remember that brightest from Earth doesn’t mean largest or brightest. The Sun is not the largest or brightest star in the universe or even the galaxy, yet it appears so bright because it is so near compared to other stars.

    #4 goes to Rigel Kentaurus, or foot of the centaur. It scores a magnitude of -.01, and is only 4 light-years from Earth.

    At #3, is Arcturus, according to the astronomy facts we know. In Greek that means guardian of the bear. Arcturus is 37 light-years from Earth.

    Canopus comes in at #2. In reality it’s the brightest of all of these top five stars. However, it’s 313 light-years away from Earth, so it looks second brightest as seen from this planet. -.62 is its magnitude is seen from the planet Earth.

    #1 is the Greek word for scorching, Sirius. Sirius is also known as the Dog Star because it’s the brightest star in the constellation of Big Dog. It’s only 9 light years from Earth. That’s second closest of these top five. At -1.44 magnitude it’s the brightest star we can see from Earth.

    This information doesn’t even scratch the surface of astronomy facts. But it’s something to consider next time you look into the sky.

    More fun facts about astronomy

    Astronomy is a fun science filled with many astronomy fun facts. This includes information about the size of stars and the distance of our earth from the center of our own Milky Way galaxy. All of this information can be recalled to entertain and enlighten people.

    The Sun is a great source of astronomy fun facts. Measurements show it between 91 and 94.5 million miles from Earth. It isn’t that scientists don’t know. It’s that the Earth orbits the sun in an elliptical, uneven, orbit. The distance varies depending on where the Earth lies in that orbit.

    The size of our son also provides many astronomy fun facts. 98% of all the matter in our solar system is inside the Sun. Even with Jupiter on our side, we’re still a measly 2% of non “the sun” stuff. Over 1.6 million earths would fit inside this star. An AU is the distance from the Earth to the Sun. The solar winds extend 50 AU’s from the sun.

    Shall we turn to some astronomy fun facts that don’t have to do with the sun? Isn’t the moon interesting? In all the universe man has only walked upon the earth and the moon. And one human man actually traveled to the moon but never left it. Dr. Eugene Shoemaker didn’t make the cut for astronauts. But when he died he was cremated and his ashes spread over the moon in 1999.

    There are even more astronomy fun facts covering the moon. Ralph Kramden, in the hit TV series Honeymooners, constantly threatened to send his wife to the moon. In 1988 13% of people questioned believed the moon is made of cheese. And finally the suits worn by the moon walking astronauts weighed 180 pounds on Earth but only 30 pounds on the moon. I’d bet the astronauts thanked their lucky stars for that.

    There are astronomy fun facts about faraway objects too. The stars we see are a gateway to the past. It can take millions of years foe light from some stars to reach us. It could be that some of those stars blinked out long ago. The number of stars in the sky is a one followed by 22 zeros. Oh boy that’s a lot.

    There are even more astronomy fun facts. But this article can’t. Learn more for yourself.

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