Eclipses: Crash Course Astronomy #5
CrashCourse・11 minutes read
The Sun and Moon look the same size in the sky because the Sun is much bigger but also much farther away. Solar eclipses are caused by the Moon blocking the Sun, while lunar eclipses happen when the Earth blocks the Sun from reaching the Moon.
Insights
- The Sun and Moon appear the same size in the sky because the Sun is 400 times wider than the Moon and also 400 times farther away, creating an optical illusion.
- Lunar eclipses, caused by the Earth blocking the Sun's light from reaching the Moon, are safe to view and can last nearly two hours, offering a unique celestial spectacle visible from anywhere facing the Moon.
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Recent questions
Why does the Sun and Moon appear the same size?
Due to the Sun being 400 times wider than the Moon and 400 times farther away.
What causes a solar eclipse?
A solar eclipse occurs when the Moon blocks the Sun.
How long does a total solar eclipse last?
Total solar eclipses are brief, lasting about seven to eight minutes.
Why do lunar eclipses appear red?
The Earth's umbral and penumbral shadows cause the Moon to darken and sometimes turn red during a lunar eclipse.
Can you view a solar eclipse without eye protection?
Viewing a solar eclipse without proper eye protection can lead to retinal damage.
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