Astronomy

Question 1

Kilo

Answer 1

1000

Question 2

centi

Answer 2

1/100

Question 3

mega

Answer 3

1,000,000 million 10 to the 6th

Question 4

giga

Answer 4

1,000,000,000 a billion

Question 5

Light year

Answer 5

the distance light travels in one year, not a unit of time

9.46X10^12 km

Question 6

Parsec

Answer 6

3.26 light years. another distance unit. useful when measuring parallax

Question 7

parallax

Answer 7

how we measure things near us such as stars

Question 8

Astronomical Unit

Answer 8

average distance between the earth and the sun, 150 million km. Useful when describing distances in our solar system

Question 9

star

Answer 9

large glowing ball of gas that generates heat and light through necular fusion

Question 10

planet

Answer 10

shines by reflected light. may be rocky, Icey, or smooth or gaseous composition. can be bits of a star. Orbits a star… must be massive enough to be rounded by own gravity, not massive enough to cause necular fusion

Question 11

Moon

Answer 11

object that orbits a planet

Question 12

Planetstimulas

Answer 12

asteroids and comets

Question 13

Asteroid

Answer 13

orbits a star and is small and rocky

Question 14

comet

Answer 14

small and icy that orbits a star

Question 15

solar system

Answer 15

stars and all materials that orbits the sun, including planets and moons

Question 16

nebula

Answer 16

cloud of gas

Question 17

galaxy

Answer 17

great group of stars in space all held together by gravity and orbiting a common center cluster or supercluster

Question 18

cluster

Answer 18

large group of galaxies bound by gravity