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Astronomy Topic 1

QuestionAnswer
Pope Gregory Who made the modern calendar?
King Ptolemy III Who added leap years to the modern calendar?
Julius Caesar Who added days to certain months?
Copernicus Who challenged the geocentric theory?
Kepler Who determined the Orbital Laws of Motion?
Hubble Who discovered distant galaxies?
Ptolemy Who first said that day and night are caused by Earth's rotation?
Galileo Who discovered sunspots?
Aristotle Who first proposed the spherical earth?
Eratosthenes Who first measured the circumference of the Earth?
Astronomy This science is based on measurement and calculations about the universe.
Astrology This makes predictions based on where celestial bodies are located at a given time.
ecliptic The path of the sun.
wanderers What ancient astronomers called the planets.
degrees Declination is measured in this unit.
hours Right ascension is measured in this unit.
Direction of Axis, Revolution & Tilt Reasons we have seasons on Earth.
23 1/2 degrees Tilt of the Earth
Umbra Dark part of the shadow during an eclipse.
Penumbra The lighter part of the shadow during an eclipse.
Lunar Eclipse When the Earth's shadow covers the moon.
Solar Eclipse When the Moon comes between the Sun and the Earth.
Annular Eclipse When the shadow of the Moon does not reach the Earth.
New Moon Both a solar eclipse & annular eclipse occurs in this moon phase.
Full Moon A lunar eclipse occurs during this moon phase.
3600 The modern calendar off by 1 day every how many years?
Summer Solstice The longest day in the northern hemisphere.
Winter Solstice The shortest day in the northern hemisphere.
Circumpolar Stars Stars that appear to circle Polaris.
Equator When the sun is overhead here, we have equal day and night.
Created by: rnewhouse
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