edHelper.com Explorers

Telescopes Over Time

---

Telescopes Over Time
Reading Level

	edHelper's suggested reading level:	grades 6 to 7
	Flesch-Kincaid grade level:	7.51

Vocabulary

	challenging words:		aberration, chromatic, convex, ocular, parabolic, refractor, moveable, radiation, objective, avid, launched, atmosphere, reflector, skyward, focal, optical
	content words:		Hans Lippershey, When Galileo, Sir Isaac Newton, Hubble Space Telescope

---

Print Telescopes Over Time

Print Telescopes Over Time  (font options, pick words for additional puzzles, and more)

Quickly Print - PDF format

	Quickly Print: PDF (2 columns per page)
	Quickly Print: PDF (full page)

Quickly Print - HTML format

Quickly Print: HTML

Proofreading Activity

Print a proofreading activity

---

Feedback on Telescopes Over Time

Leave your feedback on Telescopes Over Time  (use this link if you found an error in the story)

---

Telescopes Over Time By Mary Lynn Bushong

---

¹     Do you ever stand outside at night and look at the stars? Do you know the names of the biggest ones? Do you know which ones are planets?
 
²     People have been looking up at the stars for a long time. For most of that time all they had were their eyes. Then in 1608 the spy glass was invented by Hans Lippershey of the Netherlands.
 
³     He used two lenses to help make objects at a distance seem a little bit closer. When Galileo saw the spy glass, he saw more potential in it than just a spy glass. An avid stargazer, he finally had a tool he could use to get a better look skyward.
 
⁴     He immediately began modifying the spy glass into a telescope. The first was only a 3x telescope, but soon he was making them up to 32x. With these distance viewers, he was able to see mountains and valleys on the moon. He was also the first to see Jupiter's four moons.
 
⁵     In 1611, Kepler made a telescope using both convex ocular and objective. The result was an inverted or upside down image. Astronomers did not mind because it made the image brighter.
 
⁶     In 1686, Huygens built an outdoor telescope using convex lenses. They increased the focal length so he could clearly see the rings around Saturn.
 
⁷     Sir Isaac Newton made his own changes to telescopes in the 1680's when he used a metal mirror. With it, he created the first reflecting telescope. The mirror eliminated the problem of chromatic aberration.
 
⁸     Chromatic aberration refers to the points on an optical axis where the different colors of light come into focus. Have you ever looked at something through a lens and seen circles of color around an object? That is chromatic aberration.

Paragraphs 9 to 16:
For the complete story with questions: click here for printable

---

Weekly Reading Books

Create Weekly Reading Books Prepare for an entire week at once!

---

Explorers

Explorers

---

Social Studies

Social Studies

2004 Elections         2008 Elections         United States History and Theme Units         American Government         Ancient America         Ancient China         Ancient Egypt         Ancient Greece         Ancient India         Ancient Mesopotamia         Ancient Rome         Biographies         Canadian Theme Unit         Country Theme Units         Crime and Terrorism         Economics

European History: 1600s-1800s         Explorers         Famous Educators         Geography         Grades 2-3 Social Studies Wendy's World Series         History of Books and Writing         History of Mathematics         How Can I Help?         Inventors and Inventions         Middle Ages         Renaissance         World Religion         World War I         World War II         World Wonders

---

More Activities, Lesson Plans, and Worksheets

Back to School Graphic Organizers Alphabet Worksheets Sight Words Math Worksheets Mazes 50 States Monthly Themes January February March April May June July August September October November December

Fractions Place Value Time and Calendar Money Earth Day Solar System Analogies Nouns Following Directions Listening Capitalization Cursive Writing Patterns and Sequencing Dinosaurs All About Me Kindergarten First Grade Second Grade Third Grade Fourth Grade Fifth Grade Sixth Grade

Multiplication Division Main Idea Cause and Effect Measurement Decimals Rounding Order of Operations Verbs Community Helpers Adjectives Plants Grammar Addition and Subtraction Contractions Bulletin Board Ideas Word Searches Crossword Puzzles Printable Puzzles Reading Comprehension Reading Skills English Language Arts

Copyright © 2011 edHelper