chapter 1

Question 1

field of view

Answer 1

diameter of the visible area of the image (side to side) for subject a certain distance away

Question 2

scientific notation

Answer 2

representing large numbers by using powers of ten

Question 3

astronomical unit (AU)

Answer 3

1.5x10^8 km the average distance from Earth to the Sun

Question 4

light year (ly)

Answer 4

10^13 km (63000 AU) the distance light travels in a year

Question 5

space

Answer 5

void nearly empty of all matter, a vacuum

Question 6

planet

Answer 6

small, nonluminous body

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto

Question 7

moon

Answer 7

a natural satellite in orbit around a planet

Question 8

star

Answer 8

self-luminous ball of gas

born in clouds of dust as they pass through spiral arms of the galaxy

Question 9

star system

Answer 9

star and gravitational held bodies

Question 10

galaxy

Answer 10

cluster of stars, dust, and bodies orbiting a centre mass

Question 11

cluster

Answer 11

galaxy group

Question 12

supercluster

Answer 12

clusters of clusters of galaxies

Question 13

filaments and walls

Answer 13

long cloudy masses of superclusters (largest structures) outlining near empty voids

Question 14

cosmic calendar

Answer 14

place the universe timeline of events on a 12 month calendar