the study of the universe?
astronomy
earth spinning on its axis
rotation
Planet closest to the Sun and has the shortest revolution period
mercury
This is...
a nebula
a celestial body of hot gases that radiates energy derived from solar fusion reactions in the interior
star
How long it takes for the earth to make one revolution around the sun?
1 year/ 365 days
A natural satellite of a planet. inner planets have few _____ and outer planets have many _____.
moon
Also called the red planet and is composed of a lot of iron oxide
mars
This is...
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a galaxy
Occurs in the core of the sun when hydrogen atoms fuse to make helium and enormous amount of energy is released.
nuclear fusion
Electromagnetic wave used to see into objects
x-ray
A force of attraction between objects that is due to their masses
gravity
Largest planet in our solar system and has a giant red spot caused by low pressure storms
Jupiter
This is

a Constellation
A huge collection of gas, dust, and billions of stars and their solar systems held together by gravity.
galaxy
Electromagnetic wave used for communication and to heat food
microwaves
Electromagnetic wave that can cause changes in the DNA of your skin cells on a sunny day
UV, ultraviolet
earths "evil" twin planet
venus
This is
The Milky Way
A giant cloud of dust and gas in space which can lead to the formation of a new star.
nebula
Distance light travels in one year.
light year
The Space Race was between these two countries
USSR and USA
Jupiter, Neptune and Uranus are the __________ __________ of the solar system
gas giants
This is

aurora, northern lights
A continuum of values with no gaps. Used for measuring a phenomenon like the wavelength of light and color.
Spectrum
This celestial body reflects light from the sun, making it appear to give off light.
THE MOON
The first man to walk on the moon
Neil Armstrong
This causes Earth's seasons.
What are Earth's tilt's effects?
The place where stars are born
What is a nebula
The force that keeps planets orbiting the sun
What is gravity.