How to use a Newtonian telescope?
58The Newtonian telescope is a type of reflecting telescope invented by Sir Isaac Newton in 1668. It revolutionized astronomical observation by solving the chromatic aberration problems that plagued refracting telescopes of the time.
🔭 How it works
Concave primary mirror: Collects light from celestial objects.
Flat secondary mirror: Redirects light at a 90° angle to the eyepiece, where the observer sees the image.
Lensless: Uses only mirrors, which eliminates color distortions (chromatic aberration) common in lenses.
🌌 Advantages
Excellent light collection: Ideal for observing galaxies, nebulae, and deep-sky objects.
Cost-effectiveness: More affordable for larger diameters compared to refractors.
Compact design: Easier to transport and assemble.
⚠ ️ Disadvantages
Collimation required: Mirrors need to be well aligned to ensure sharp images.
Sensitive to dust: Requires periodic mirror cleaning.
Can be bulky: Larger models are less portable.
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