The article I read for this conceptual objective is “Telescope” http://www.encyclopedia.com/science-and-technology/astronomy-and-space-exploration/astronomy-general/telescope
This article describes telescopes as being “an instrument that collects and analyzes the radiation emitted by distance sources.” telescopes are able to do this by using a collection of lenses and mirrors to be able to allow people to see objects that are far away by magnifying them to make the view clearer. We saw an example of this in class when a telescope was brought in and we were asked to look down through the lens and say what we saw. The answer the class gave to this was “ourselves” because we were able to see the mirrors on the inside reflecting our image. Telescopes themselves are able to achieve most frequencies from radio waves to gamma rays which are types of light. They have a pretty large range of ability. Although they may be more sensitive and more capable today, telescopes were not always as advanced. In the year 1608 a man by the name of Hans Lippershey constructed the first optical telescope but not for the use of viewing celestial objects it wasn’t till a year later that the first astronomical telescope was built by the famous Galileo Galilei. Some of the first things that he viewed when he developed his telescope were mountains on the moon, four of Jupiter’s moons, sunspots, and finally the Milky Way itself.
Like I mentioned earlier though we have come a long ways since the days of only using a small handheld telescope. Nowadays we have many types of telescopes some include large in ground disks such as the Arecibo Telescope in Puerto Rico and the 27 telescopes lined up next to one another in the state of New Mexico.
These telescopes are only capable of detecting certain forms of light such as visible light, radio waves, some infrared, and some ultra violet light because other light sources such as gamma rays, x-rays, most ultra violet, and most infrared are blocked by the Earths atmosphere from being able to reach the surface. This leaves the last and best kind of telescopes that have a larger array of ability. The space telescopes which are able to see all the different light frequencies because there is nothing from Earth blocking it. An example of great space telescope is Hubble.
We learned about all of this in class by doing lecture tutorials on light and discussing our notes about each of the telescopes as we went through the slides.
Besides the moon phases blog this one has been my favorite so far. I have always thought that telescopes were one of the most amazing inventions man has ever come up with because you have the capability to look up into the night sky and see all the stars and planets shining and the moons eclipses in the darkness of space. This is what makes astronomy interesting. The article was great also. It gave me a lot of information I already knew but it did go into some facts about the history of the telescope that I had never heard of which is rare for me to have instances like that. It also went into greater detail about the mechanics behind the telescope to help better understand how they receive their information which was very enlightening as well. This was definitely a good blog topic I look forward to our next unit.