Space Exploration
Moon Sun Earth
Planets
Stars
Other Objects in Space
100
the first dog sent to space
Laika
100
an imaginary line which runs from the North Pole to the South Pole
axis
100
What planet is this? 
Mars
100
a group of stars forming a recognizable pattern
constellations
100
made of gas, dust, and ice and move around the Sun in an oval-shaped orbit
comets
200
enable astronomers to observe stars and other objects
telescopes
200
refers to how much a moon’s face appears to be illuminated
phase
200
sixth planet from the Sun, rotates rapidly, largest ring system in the solar system. It has seven bands of rings.
Saturn
200
sometimes stars get trapped in this. Its gravity pulls in the mass and destroys it.
black hole
200
huge collections of stars. A mixture of stars, gasses, and dust, held together by the force of gravity.
galaxies
300
any small object that orbits a larger object
satellite
300
occurs when the moon’s shadow appears on Earth’s surface
solar eclipse
300
smallest planet, and planet closest to the Sun. It has no atmosphere
Mercury
300
cloud of gas and dust. They are cold, dense, and dark.
nebula
300
parts of the meteors burn up in the Earth’s atmosphere, but some of it makes its way to Earth.
meteorites
400
life that originates outside Earth, another name of alien
extraterrestrial life
400
the time it takes a planet to make one complete revolution
a year
400
interior is mostly frozen water and ammonia(type of gas) with a rock and iron core
Neptune
400
an enormous explosion that destroys a star
supernova
400
rock like objects made of stone, orbit the Sun in the belt between the orbits of Mars and Jupiter.
asteroids
500
a series of space missions designed to send people to the moon. Neil Armstorng and Buzz Aldrin were the first two astronauts to walk on the moon.
Project Apollo
500
a day when Earth’s rotation axis is leaning along Earth’s orbit
Equinox
500
Name on example of a dwarf planet besides PLUTO
Eris, Makemake, and Ceres.
500
hot, dense, slowly cooling sphere of carbon. This is the one sign of the end phase of a star.
white dwarf
500
formed when meteors and comets collide, causing smaller pieces to break off.
meteoroids