Astronomy & Cosmology CH 1 QQ

The age of our solar system is about A) 1/3 of the age of the universe B) 3/4 of the age of the universe C) the same as the age of the universe

A) 1/3 of the age of the universe

Which of the following correctly lists our "cosmic address" from smallest to largest? A) Earth, solar system, Milky Way Galaxy, Local Group, Local Supercluster, universe B) Earth, solar system, Local Group, Local Supercluster, Milky Way Galaxy, universe C) Earth, Milky Way Galaxy, solar system, Local Group, Local Supercluster, universe

A) Earth, solar system, Milky Way Galaxy, Local Group, Local Supercluster, universe

A light-year is A) about 10 trillion kilometers B) the time it takes light to reach the nearest start C) the time it takes light to travel around the Sun

A) about 10 trillion kilometers

We are "star stuff" in the sense that A) they are made of elements that were produced in stars B) our bodies have the same chemical composition as stars C) we are born, live, and die, just like stars

A) they are made of elements that were produced in stars

An astronomical unit is A) any planet's average distance from the Sun B) Earth's average distance from the Sun C) any large astronomical distance

B) Earth's average distance from the Sun

Could we see a galaxy that is 20 billion light-years away? A) Yes, if we had a big enough telescope B) No, because it would be beyond the bounds of our observable universe C) No, because a galaxy could not possibly be that far away

B) No, because it would be beyond the bounds of our observable universe

When we say the universe is expanding, we mean that A) everything in the universe is growing in size B) the average distance between galaxies is growing in time C) the number of stars in the universe is growing with time

B) the average distance between galaxies is growing in time

If we represent the solar system on a scale that allows us to walk from the Sun to Pluto in a few minutes, then A) the planets are the size of basketballs and the nearest stars are a few miles away B) the planets are marble size or smaller and the nearest stars are a few thousands of miles away C)The planets are microscopic and the stars are millions of miles away

B) the planets are marble size or smaller and the nearest stars are a few thousands of miles away

The number of stars in the Milky Way Galaxy is roughly A) 100,000 B) 100 million C) 100 billion

C) 100 billion

The star Antares is 604 light-years away. If it explodes tonight, A) we'll know because it will be brighter than the full Moon B) we'll know because debris from the explosion will rain down on us from space C) We won't know about it for another 604 years

C) We won't know about it for another 604 years

The event that triggered the change in Pluto's status from planet to dwarf planet was the discovery that A) it is smaller than the planet Mercury B) it has a comet-like composition of ice and rock C) it is not the largest object in its region of the solar system

C) it is not the largest object in its region of the solar system

The Big Bang is the name as astronomers give to A) everything in the universe is growing in size B) the average distance between galaxies is growing with time C) the birth of the universe

C) the birth of the universe