Mercury - The closest planet to the Sun.
Venus - Earth's twin sister because of its size, similar composition, and mass.
Earth - About seventy percent of Earth's surface is covered in water.
Mars - The red planet and has the largest volcano in our solar system
Jupiter - This gas giant is considered the largest planet in our solar system.
Saturn - This gas giant is surrounded by a system of rings made of ice, dust, and rock.
Uranus - This gas giant has twenty-seven known satellites.
Neptune - This gas giant is the farthest planet from the sun in our solar system.
In 2006, the International Astronomical Union (IAU) renamed Pluto as a dwarf planet.
The Sun is about 109 times the size of Earth.
It takes light 8 minutes and 20 seconds to travel from the Sun to Earth.
A blue star is hotter than a red star.
Red stars have a temperature that is cooler than the sun.
Planet Earth is located in the Milky Way galaxy.
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named Olympus Mons.
Additional Facts:
The planets in the order from the closest to the farthest from the sun
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the largest known star in the universe
a celestial body that is red in color with the brightness sometimes equal to an entire galaxy
UY Scuti
quasar
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a cloud formation of dust and gas seen as light against a darkened area
nebula
the beginning of the death of a star
an explosion of a star in the latter stages of its development
red giant stage
supernova
the brightest star in the night sky
Sirius
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a very large formation of stars, gas, and dust grouped together in the universe
the study of the size, movements, and composition of stars, planets, comets, and other deep-space objects in the universe
galaxy
astronomy
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the theory that suggests that the universe will continue to expand indefinitely
open universe
the theory that suggests that the universe will stop expanding
the star at the center of our solar system
closed universe
the Sun
a rotating star that consists of neutrons and releases electromagnetic radiation
pulsar
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the third planet from the sun
Earth
Earth's natural satelite
the Moon
Science: Our Solar System - Flashcards
Use the flashcards to help you memorize the following terms and definitions. Then try the worksheets shown on the Science Homepage. Once you are ready to quiz yourself, click the Quiz link.
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