Speed of the Earth

The video explains Earth's constant movement through space, detailing how astronomers calculate its speed. By observing celestial objects, they determine Earth's orbit radius and circumference, which is approximately 940 million kilometers. Earth completes this orbit in one year, translating to a speed of nearly 30,000 meters per second. Despite feeling stationary, viewers travel millions of meters through space during the video.

What have astronomers calculated about Earth's movement without leaving the planet?

• The number of stars in the galaxy

• The age of the universe

• The speed at which Earth is moving

• The exact distance to the Sun

How did early astronomers determine the radius of Earth's orbit?

• By using a telescope to measure the Sun's size

• By measuring the Earth's shadow

• By observing the transit of Venus

• By calculating the speed of light

What is the approximate radius of Earth's orbit around the Sun?

• 250 million kilometers

• 200 million kilometers

• 150 million kilometers

• 100 million kilometers

How long does it take for Earth to complete its orbit around the Sun?

• 8766 hours

• 365 days

• All of the above

• 31,558,000 seconds

What is Earth's speed as it travels through space?

• 10,000 meters per second

• 20,000 meters per second

• 40,000 meters per second

• 30,000 meters per second