ASTR 1000 Review

Front

What observation by Galileo provided direct proof of a planet orbiting the Sun?

Back

The phases of Venus.

Front

What would appear to be the youngest galaxies in a photograph of many galaxies formed after the Big Bang?

Back

Those galaxies that are the furthest away.

Front

What is the Milky Way composed of?

Back

Many individual stars.

Front

What phenomenon did Galileo observe that showed patterns of shadow and sunlight on the Moon?

Back

The dividing line between the light and dark portions of the Moon's face.

Front

What is the significance of the phases of Venus in astronomy?

Back

They provide evidence for the heliocentric model of the solar system.

Front

How does the distance of a galaxy affect its appearance in photographs?

Back

Galaxies that are further away appear younger and bluer due to the redshift effect.

Front

What is the Big Bang theory?

Back

A scientific explanation for the origin of the universe, stating it began from a singular point and has been expanding ever since.

Front

What does redshift indicate about a galaxy's movement?

Back

It indicates that the galaxy is moving away from the observer, suggesting the universe is expanding.

Front

What is the difference between a planet and a star?

Back

A planet orbits a star and does not produce its own light, while a star generates light and heat through nuclear fusion.

Front

What role do gravitational forces play in the formation of galaxies?

Back

Gravitational forces pull matter together to form stars and galaxies.