Astronomy_unit 1

From the choices presented - which is the largest object or structure in space?

• Earth

• The Sun

• The Solar System

• The asteroid belt

Which object or structure is the smallest?

• Earth

• Mars

• Jupiter

• The Solar System

The largest single object in the solar system is ______.

• Saturn

• Jupiter

• Earth

• The Sun

The largest structure in the entire Universe is the

• Universe itself.

• Orion Nebula.

• Milky Way Galaxy.

• Virgo Supercluster.

What is a "light year?"

• a distance of about 6 trillion miles (9.8 trillion km)

• the distance traveled by the speed of light in 1 year

• the time traveled by the speed of light in 1 year

• a distance of about 6 billion miles (9.8 billion km)

Why do astronomers use light years as a measurement?

• because miles & kilometers are sufficient

• it's an easier way to describe huge distances

• it's an easier way to describe large objects such as stars

• because distances in space are extremely vast

The Milky Way galaxy is approximately _____ thousand light years in diameter.

• 1000

• 10

• 100

• 1

It would take a single beam of light about ______ years to travel across the Milky Way.

• 1 million

• 10

• 100,000

• 1 billion

The visible Universe may contain over _____ trillion galaxies.

• 100

• 1

• .1

• 100,000

Which statement best describes constellations?

• indecipherable so-called "patterns" that kinda make sense

• stars that are fairly close to each other

• patterns of stars that resemble animals and/or other objects

• pattern of stars in the night sky that reflects a culture