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DISTANCES

ASTRONOMY
WOOSTER HIGH SCHOOL
Across
The apparent change in an objects position due to a change in vantage point. (e.g. finger-eye _____).
The distance light can travel in one year.
The ancient Greeks and other civilizations realized that the Earth was _____ for various reasons.
Decreased brightness of a star because it’s far away.
These stars get bigger and smaller in a repeating cycle. The period of the cycle is proportional to the absolute brightness.
In the 1960s astronomers bounced ___ ___ off of Venus to very accurately measure its orbit.
The passage of a planet (e.g. Venus) in front of its star (e.g. the Sun).
Down
A Type 1A supernova has the same absolute ____ no matter where it is.
Using a lunar eclipse, the Greeks found the size of the ____ and its distance from Earth.
The distance at which 1 AU subtends one arc second.
This is the average distance from the Earth to the Sun.
Brightness of a star if you were 1AU away.
Satellite used to accurately measure the distance to nearby stars using parallax.
If we know the absolute brightness of a star, we can find the _____ to it.