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Basic Astronomy

by Scott
Across
Venus' atmosphere is made mostly of this carbon molecule.
This scientist came up with a theoretical equation predicting how many civilizations may exist in the universe.
This gas gives Neptune its typical blue color.
Four letter word from Latin meaning "Moon".
This Galaxy is about 2 million light years from ours.
Einstein's E=MC2, the C stands for this quality
Beyond Mars, there is a certain belt. It is a collection of rocky objects of various sizes. Name of this belt.
This planet is about 934 million miles from the Sun.
This unit defines the distance between earth and the Sun.
Fourth terrestrial planet
Moon of Mars, think of light
The entire solar system is surrounded by a shell of frozen bits of ice and rock called the ______ cloud.
Nearest star to Earth. Proxima________
First rocky planet in our solar system.
Orbital paths of planets are defined by this scientist's laws.
Helium in the Sun needs this element to fuse.
Name of Pluto's largest moon.
Down
They are solar system objects in orbit around the Sun. (dirty snowballs)
Third gas planet from Jupiter
Name of scientist that discovered this reappearing comet.
This is a collection of hundreds of billions of stars.
Term for a planet that has not yet cleared its orbit; partial planet
One of Jupiter's largest moons
This belt extends from the orbit of Neptune out to a distance of well beyond 50 AU from the Sun.
The atmosphere is a protective blanket, absorbing most solar U/V light. It keeps temperatures warm through what is referred to as this effect.
These are massive dense objects with gravity so strong that nothing, not even light can escape them. This renders them invisible.
Outermost layer of the Sun.
Earth is in this Galaxy
These are areas on the Sun threaded with magnetic fields that appear dark because they are cooler than the surrounding regions
A major moon of Saturn.
They represent millions of bits and pieces of solar system debris are orbiting among the planets
This is equal to 3.26 light years
Visible light consists of these colors, orange, yellow green, blue, indigo and ....
Opposite of dark matter.
As the particles from the comet stream fall to the surface, they vaporize in the atmosphere, creating these.