Please select the word from the list that best fits the definition his observations suggested that planets had substance

Galileo
Kepler
elliptical
gravity
heliocentric

Which empire was called "the sick man of europe? "

Sparta faces threats from without and within the city-state who posed these threats.

How are the perspectives presented in the excerpts similar? they show the disappointment and fear mission control workers feel when the lunar module develops problems. they show the huge investment of time and energy mission control workers dedicated to the lunar module. they show how mission control workers view the lunar module as if it is the workers' very own child. they show the relief and excitement mission control workers feel when the lunar module lands on the moon.