group 5 chloe, daria, dylan, eleanor

REFRACTOR/REFLECTOR TELESCOPES By: Chloe, Daria, Dylan, Eleanor

REFLECTOR

Two concave mirrors make light bounce up to another mirror, which bounces light into the eyepiece.

REFRACTOR

Refractor telescopes use convex lenses to collect, focus, and magnify light.

REFLECTOR PROS/CONS

The Mirrors in the telescope have to be recoated every few years in order to function properly

Its easy to damage them, they are fragile if you handle them to roughly

The reflector is good for deep-sky objects

Large Reflectors are very popular

Pros Cons

REFRACTOR PROS/CONS

The Refractor telescope is better for observing the planets and the moon

The Refractor telescope uses lenses instead of mirrors so they don’t have to get recoated like the mirrors of the reflector telescope

The refractor suffers from chromatic aberration

Very expensive

Pros Cons

REFLECTOR HISTORY

The Reflector Telescope was invented by a Scottish astronomer named James Gregory. James Gregory was the one who designed in 1663 and then in 1689 Isaac Newton built the first Reflector telescope.

REFRACTOR HISTORY

The Refractor telescope was invented by a Dutch optician, Hans Lippershey who designed convex lenses held in front of each other, he put the lenses in a tube to make the first refractor telescope.

BIBLIOGRAPHY Bibliography Refractor Telescope. (1998 - 2013). Retrieved from How

Stuff Works: http://science.howstuffworks.com/telescope1.htm

Brain, M. (1998 - 2013). Refractor Telescope. Retrieved from How Stuff Works: http://science.howstuffworks.com/telescope1.htm

"All about Telescopes: Refractors, Reflectors and More." All about Telescopes: Refractors, Reflectors and More. N.p., n.d. Web. 28 Jan. 2013.

"How Telescopes Work." HowStuffWorks. N.p., n.d. Web. 28 Jan. 2013

"Reflector Telescope." Universe Today RSS. N.p., n.d. Web. 28 Jan. 2013

"Advantages and Disadvantages of Reflecting Telescopes." Yahoo! Contributor Network. N.p., n.d. Web. 28 Jan. 2013.