Space - Short

Astronomy was once known as the study of the night sky. Today astronomy is officially known as the study of what?

• the solar system
• the universe
• the galaxy
• everything outside the earth's atmosphere

Which astronomer was the first to talk about a sun-centered universe?

• Ptolemy
• Kepler
• Brahe
• Copernicus

Newton's Law of Gravity explained why the planets orbit the sun. Why is the sun the center of the solar system?

• The sun is a star
• The sun was there first
• The sun is the most massive
• The sun has both a magnetic and gravitational field

The force of gravity between two objects depends on the mass of the objects and what else?

• the distance between them
• the acceleration of the objects
• the speed of the objects
• the direction of the object's motion

The invention of the telescope and the description of what led the way to modern astronomy?

• gravity
• energy
• motion
• momentum

When did scientists first discover something outside of our galaxy?

• 1920's
• 1930's
• 1940's
• 1950's

What scientist proved that other galaxies existed outside of the Milky Way?

• Galileo
• Newton
• Hawking
• Hubble

The Milky Way is the name of our...

• solar system
• galaxy
• universe
• planet

Matter that has the same size but opposite electric charge is called what?

• dark matter
• dark energy
• anti-matter
• charge-matter

Supernovas occur because...

• gravity over powers the fusion explosions in a star
• the fusion explosions inside a star over power gravity
• the fusion explosions and gravity are balanced