Understanding Why Stars Twinkle

Why do stars appear to twinkle when observed from Earth?

• Because they are moving rapidly

• Due to Earth's atmosphere

• Because they are changing colours

• Due to their own light fluctuations

What is the main reason stars do not twinkle when observed from space?

• There is no atmosphere in space

• Stars are closer in space

• Stars are brighter in space

• Space telescopes have special lenses

Which star is mentioned as a classic example of a star that appears to shift colours?

• Sirius

• Betelgeuse

• Vega

• Polaris

What factor causes stars near the horizon to twinkle more?

• They are dimmer

• Their light travels through more atmosphere

• They are closer

• They are larger

Why do planets not twinkle like stars?

• They are not visible at night

• They are too far away

• They have a larger apparent size

• They emit their own light

What is the term used by astronomers to describe the quality of observing conditions?

• Visibility

• Seeing

• Transparency

• Clarity

Which location is NOT mentioned as an ideal spot for observatories?

• Canary Islands

• Hawaii

• Himalayas

• Atacama Desert

What effect does humid weather have on star twinkling?

• It has no effect

• It reduces twinkling

• It makes stars disappear

• It increases twinkling

What causes the light from stars to change colour as it twinkles?

• The star's size

• Atmospheric refraction

• The star's distance

• The star's temperature

What is the nearest star to Earth after the sun?

• Betelgeuse

• Sirius

• Proxima Centauri

• Alpha Centauri