Eclipses
⭐ MasteredA solar eclipse happens when the Moon passes between the Sun and Earth, blocking sunlight. A lunar eclipse happens when Earth's shadow falls on the Moon.
Never look at a solar eclipse without special glasses.
All about Eclipses
An eclipse happens when one object in space passes into the shadow of another. A solar eclipse happens when the Moon passes between the Sun and Earth, blocking the Sun's light from part or all of Earth.
Solar eclipses can be partial or total, and they are only visible from certain places. Looking directly at a solar eclipse can harm your eyes, so use proper eclipse glasses or a pinhole projector to watch safely.
Only people in a narrow path on Earth see the Sun completely covered.
The Moon may look reddish during a lunar eclipse. Eclipses are safe to watch with special eclipse glasses, but never look at the Sun without protection.
🎮 Try it yourself!
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👀 What the animation shows
This animation shows the Sun, Moon and Earth lined up. Watch how the Moon's shadow falls on Earth during a solar eclipse, and how Earth's shadow falls on the Moon during a lunar eclipse.
Real-life uses of Eclipses
- Studying the Sun's outer atmosphere during a total solar eclipse
- Predicting eclipses far in advance for science
- Inspiring people to watch the night sky
Frequently asked questions about Eclipses
Why is it dangerous to look at the Sun during an eclipse?
Even when most of the Sun is covered, the remaining sunlight is strong enough to damage your eyes.
How often do eclipses happen?
Solar and lunar eclipses happen a few times each year, but they are only visible from particular places.
Is a lunar eclipse safe to watch?
Yes. You can look at a lunar eclipse with your naked eyes safely.