What is an Astronomical Unit (AU)?
Solar System Flashcard

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Professional Development
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1.
FLASHCARD QUESTION
Front
Back
An Astronomical Unit (AU) is a standard unit of measurement used in astronomy to describe distances within our solar system, defined as the average distance from the Earth to the Sun, approximately 93 million miles or 150 million kilometers.
2.
FLASHCARD QUESTION
Front
What is the Kuiper Belt?
Back
The Kuiper Belt is a region of the solar system beyond the orbit of Neptune, populated with small icy bodies and is the point of origin for many comets.
3.
FLASHCARD QUESTION
Front
What is the Oort Cloud?
Back
The Oort Cloud is a theoretical cloud of predominantly icy objects that exist in the outermost reaches of the solar system, believed to be the source of long-period comets.
4.
FLASHCARD QUESTION
Front
What is the distance from the Earth to the Sun in miles?
Back
The distance from the Earth to the Sun is approximately 93 million miles.
5.
FLASHCARD QUESTION
Front
What is the age of our solar system?
Back
The solar system is approximately 4.6 billion years old.
6.
FLASHCARD QUESTION
Front
What is a light year?
Back
A light year is the distance that light travels in one year, approximately 5.88 trillion miles (9.46 trillion kilometers), used to measure astronomical distances.
7.
FLASHCARD QUESTION
Front
What is a parsec?
Back
A parsec is a unit of distance used in astronomy, equivalent to about 3.26 light years, used to measure distances to stars and galaxies.
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