Astronomical Unit (AU)
Astronomy Terms and Definitions

Flashcard
•
Chemistry
•
10th Grade
•
Hard
Jared Holman
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18 questions
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1.
FLASHCARD QUESTION
Front
Back
The (average) distance between the Earth and the Sun
2.
FLASHCARD QUESTION
Front
Light-Year (ly)
Back
The distance light travels in one year (9.46 \times 10^{12} km or 9,460,000,000,000 km)
3.
FLASHCARD QUESTION
Front
Parallax
Back
A technique used to determine the distance of nearby stars by observing their "shift" in position based on background stars
4.
FLASHCARD QUESTION
Front
Apparent Magnitude
Back
The brightness of a celestial object as seen from Earth
5.
FLASHCARD QUESTION
Front
Absolute Magnitude
Back
The inherent brightness of an object as if it were a standard distance of 10 parsecs from Earth
6.
FLASHCARD QUESTION
Front
Spectroscopy
Back
Used to determine the chemical composition of stars
7.
FLASHCARD QUESTION
Front
Sidereal Day
Back
The time it takes Earth to complete one rotation relative to distant stars; shorter than a solar day (23 h 56 min)
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