The Sun's Size and Solar Eclipses Explained

Bill Nye explains why the sun appears small due to its distance from Earth, despite its massive size. He describes how solar eclipses occur when the moon blocks the sun, casting a shadow on Earth. Bill also demonstrates how to safely observe the sun using a pinhole viewer, emphasizing the importance of not looking directly at the sun to avoid eye damage.

Why does the Sun appear small when viewed from Earth?

• Because it is not very bright.

• Because it is hidden by clouds.

• Because it is very far away.

• Because it is actually small.

How many Earths would fit across the Sun's diameter?

• 150

• 109

• 75

• 50

What is the approximate temperature at the Sun's core?

• 5 million degrees Celsius

• 20 million degrees Celsius

• 15 million degrees Celsius

• 10 million degrees Celsius

What happens during a solar eclipse?

• The Earth blocks the Sun from the Moon.

• The Moon blocks the Sun from the Earth.

• The Earth blocks the Moon from the Sun.

• The Sun blocks the Moon from the Earth.

What is the role of the Moon in a solar eclipse?

• It absorbs sunlight.

• It moves closer to the Sun.

• It casts a shadow on Earth.

• It reflects sunlight onto Earth.

Why should you never look directly at the Sun?

• It is always covered by clouds.

• It is not interesting to look at.

• It is too bright to see anything.

• It can damage your eyes.

What is used to safely observe the Sun in the demonstration?

• A pinhole viewer

• A magnifying glass

• A telescope

• Sunglasses

What material is used to create the pinhole in the viewer?

• Plastic

• Aluminum foil

• Cardboard

• Glass