Exploring the Universe: From Ancient Maps to Cosmic Boundaries

What has driven humans to explore the universe for thousands of years?

• The desire to conquer new lands

• The search for extraterrestrial life

• The need for new resources

• Curiosity about what lies beyond known boundaries

Who was the Greek scholar that calculated the Earth's circumference?

• Socrates

• Ptolemy

• Eratosthenes

• Aristotle

What phrase did mapmakers use to indicate unknown lands?

• Here be dragons

• Here be monsters

• Here be lions

• Here be giants

What phenomenon helped astronomers determine that stars are farther away than planets?

• Eclipse

• Parallax

• Diffraction

• Refraction

What discovery did Edwin Hubble make about the Andromeda galaxy?

• It is a nebula

• It is a star cluster

• It is another galaxy

• It is part of the Milky Way

What is the significance of Cepheid stars in astronomy?

• They help measure cosmic distances

• They are the largest stars

• They are the oldest stars

• They are the brightest stars

What does redshift indicate about a celestial object?

• It is moving away from us

• It is stationary

• It is rotating

• It is moving towards us

What is the limit of our observable universe?

• The farthest star we can see

• The edge of the Milky Way

• The boundary of the solar system

• The distance beyond which galaxies recede faster than light

What shape does one theory suggest the universe might have?

• A sphere

• A cube

• A torus

• A pyramid

How much larger could the universe be compared to the observable universe, according to some estimates?

• At least 500 times larger

• At least 100 times larger

• At least 250 times larger

• At least 1000 times larger