Objects in Space

Question 1

galaxy

Answer 1

a big collection of gas and dust

Question 2

moon

Answer 2

natural satellite that orbits the earth

Question 3

comet

Answer 3

frozen leftovers from the formation of the solar system

Question 4

asteroid

Answer 4

big rocks in space

Question 5

low mass star

Answer 5

a star with mass less than about 2 times the mass of the Sun

Question 6

black hole

Answer 6

an area in space where gravity is so strong that nothing, not even light, can escape from it

Question 7

red giant

Answer 7

type of star that has run out of hydrogen fuel

Question 8

sun

Answer 8

a huge ball of hydrogen and helium held together by its own gravity

Question 9

protostar

Answer 9

a young star

Question 10

supernova

Answer 10

the big explosion of a star

Question 11

nebulae

Answer 11

big clouds of gas and dust

Question 12

dwarf planet

Answer 12

small bodies that orbit the Sun but do not meet all the criteria to be planets

Question 13

exoplanets

Answer 13

Exoplanets are planets that orbit stars outside our solar system

Question 14

constellations

Answer 14

group of stars that form a recognizable shape

Question 15

nuclear fusion

Answer 15

which is when tiny parts of atoms come together to make a new star

Question 16

white dwarf

Answer 16

a star at the very end of its life

Question 17

black dwarf

Answer 17

when a white dwarf star becomes too cold

Question 18

main sequence star

Answer 18

a star that is fusing hydrogen to helium in its core

Question 19

habitable zone

Answer 19

areas might have liquid water (on exoplanets)

Question 20

How do scientists find exoplanets

Answer 20

measuring how a planet pulls on its star.