Observing the Sun Safely

The Dangers of Direct Solar Observation

Never look directly at the Sun with your naked eyes or through a telescope without proper solar filters as it can cause permanent eye damage or blindness.
Do not use sunglasses, photographic film, or CDs as makeshift solar filters. These items do not protect your eyes adequately from the Sun’s harmful rays.
Solar Observation must be done with caution. The Sun emits intense light and invisible ultraviolet and infrared radiation which can be very harmful.

Safe Methods for Solar Observation

Projection Method

One of the safest ways to observe the Sun is by using a method called pinhole projection or optical projection.
For pinhole projection, make a pinhole in a card and hold it up to the Sun. The sunlight will go through the pinhole and project an image of the Sun on another card held behind it.
Optical projection involves projecting an image of the Sun through a telescope onto a white card or screen. Warning: never look through the telescope during this process.

Use of Solar Filters

A solar filter can safely be used directly on the end of a telescope. These blocks out the majority of the Sun’s light, only allowing a small, safe amount to enter the telescope.
Ensure that the solar filter is snugly fitted on the telescope so it cannot be accidentally knocked off while observing.
Always check the solar filter for scratches or cracks before using it. Even a small scratch can let through harmful sunlight.

Eclipse Glasses

Eclipse glasses contain special solar filters for viewing solar eclipses safely. You should only use them if they are compliant with international safety standards.
As with telescope solar filters, ensure that the eclipse glasses are free from cracks and scratches before use.
Never look through a telescope or binoculars while wearing eclipse glasses. The concentrated sunlight can damage the glasses and your eyes.

Solar Telescopes

Solar telescopes are specifically designed for Sun observation and have built-in solar filters.
Always follow the manufacturer’s instructions when using a solar telescope.
Some solar telescopes even allow viewing of solar prominences and flares safely.

Remember, safe Sun observing practices are crucial to prevent severe eye injury. Never take any risks when observing the Sun.