The Amazing Universe: Distances in Space

The video explains how distances are measured on Earth using kilometers or miles and introduces the concept of measuring distances in space. For nearby objects like the Moon and Sun, kilometers are used, but for distant stars, light years are the standard unit. A light year is the distance light travels in one year, with light moving at 310,000 kilometers per second. The video also provides examples of star distances, such as Rigel being 910 light years away and Denna 1,830 light years away.

What units are typically used to measure distances on Earth?

• Light years

• Kilometers or miles

• Parsecs

• Astronomical units

What is a light year?

• The time it takes for the Earth to orbit the Sun

• The distance between the Earth and the Moon

• The distance light travels in one year

• The time it takes for light to travel from the Sun to Earth

How fast does light travel?

• 190,000 miles per second

• 310,000 kilometers per hour

• 190,000 miles per hour

• 310,000 kilometers per second

How far is the star Rigel from Earth?

• 910 light years

• 1,830 light years

• 93 million miles

• 150 million kilometers

What does it mean when we say the light from Denna is 1,830 years old?

• The star is 1,830 kilometers away

• The light took 1,830 years to reach us

• The star is 1,830 miles away

• The light is 1,830 seconds old