About This Chapter
Who's it for?
Anyone who needs help learning or mastering introductory astronomy material will benefit from taking this course. There is no faster or easier way to learn introductory astronomy. Among those who would benefit are:
- Students who have fallen behind in understanding astronomy
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about telescopes
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the telescopes chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the telescopes chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any telescopes question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in a telescopes unit of a standard intro to astronomy course. Topics covered include:
- Light sensors of eyes and cameras
- Properties of a telescope
- Categories of astronomical observation
- Defining diffraction limit
- Radio, reflecting and refracting telescopes
- Telescopes and the electromagnetic spectrum
- Invisible wavelengths telescopes vs. visible light telescopes
- Astronomical observations and how they're affected by Earth's atmosphere
1. Telescopes: Powers & Limitations
This lesson will discuss some limitations and three important powers of the telescope: the light gathering power, resolving power, and magnifying power.
2. Types of Telescopes: Radio, Reflecting & Refracting Telescopes
Learn about the different types of telescopes that astronomers use: X-ray, radio, gamma ray, reflecting and refracting. Learn what the differences are between them and what different things they show us about the universe.
3. How Telescopes Form Images
This lesson will explain to you the fundamental points of how images are formed in refracting and reflecting telescopes as well as why our eyes need telescopes to help us see distant objects.
4. How Telescopes Detect & Measure Light
This lesson will go over the numerous methods astronomers can use to detect and measure light, including photography, spectroscopy, photometry, and CCDs.
5. Refracting & Reflecting Telescopes: Key Concepts
This lesson will discuss some key terms and concepts relating to the refracting and reflecting telescope: primary mirror/lens, eyepiece, focal length, focal point, chromatic aberration, and achromatic lens.
6. Different Kinds of Traditional Reflecting Telescopes
This lesson will discuss three major kinds of traditional reflecting telescopes and their major differences. These include the Newtonian, Cassegrain, and Schmidt-Cassegrain telescopes.
7. Major Forms of Telescope Mounts & Modern Mirrors
This lesson will discuss two major telescope mounts, the equatorial and altazimuth mount, as well as two modern kinds of telescope mirrors, the floppy and segmented mirrors.
8. Radio Telescopes & Interferometry
This lesson will go over some key concepts related to radio astronomy. We'll cover what radio telescopes are, the basics of how they function, and what their disadvantages are compared to optical telescopes and how this is resolved.
9. Telescopes & the Electromagnetic Spectrum
This lesson will teach you about which forms of light can reach the ground and which cannot and how we overcome this problem. We'll go over the concept of seeing as well as why we send telescopes into space.
10. Telescopes & False Color Images
How do we 'see' invisible forms of light if they're invisible? What would happen if your eyes had the ability for X-ray vision here on Earth? This lesson will help answer these questions.
11. Factors That Hinder Astronomical Observations on Earth
This lesson will discuss several important factors that affect the ability of someone using a telescope to see a celestial object clearly, including weather, dust, seeing, and light pollution.
12. Using Telescopes, Spectroscopes & Probes to Investigate the Universe
Humans are explorers. It's exciting, but it also leads to great discoveries about the universe. Learn how we use telescopes, probes and spectroscopes to investigate the universe.
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Other chapters within the Intro to Astronomy: Help and Review course
- The History of Astronomy: Help and Review
- How Scientists Think and Work: Help and Review
- Matter, Energy, and Astronomy: Help and Review
- Light in Astronomy: Help and Review
- Newton's Laws in Astronomy: Help and Review
- Rotational Motion and Astronomy: Help and Review
- Orbits, Tides, and Gravity: Help and Review
- Relativity in Time and Space: Help and Review
- Conservation Laws in Astronomy: Help and Review
- Earth's Spheres and Astronomy: Help and Review
- The Earth, Sky, and Moon: Help and Review
- The Moon's Form and Phases: Help and Review
- The Atmosphere on Earth and Other Planets: Help and Review
- Influences on Climate: Help and Review
- The Sun and Energy: Help and Review
- Star Types and Significance: Help and Review
- Measurement of Star Qualities: Help and Review
- The Birth and Life of Stars: Help and Review
- Star Death and Stellar Remnants: Help and Review
- Formation of the Solar System: Help and Review
- Galaxies, Stars and Solar Systems
- Components of the Solar System: Help and Review
- Small Celestial Bodies in the Solar System: Help and Review
- The Milky Way Galaxy: Help and Review
- Characteristics of Galaxies: Help and Review
- Life & the Universe: Help and Review
- Navigation and Timekeeping in Astronomy: Help and Review