Axis		two days of the year where either hemisphere not tilted towards or away from the sun.
Revolution		The movement of an object around another object
Rotation		the spinning motion of a planet on its axis
Corona		the inner layer of the sun atmosphere
Sunspots		areas of gas on the Sun’s surface that are cooler than the area around it.
Heliocentric		two days of the year when the sun reaches its most northern or southern point.
Geocentric		The imaginary line through the Earth’s center
Equinox		an eruption on the surface of the sun
Solstice		model of the solar system that the planets revolve around the Earth.
Lunar Eclipse		outer layer of the Sun’s atmosphere
Solar Eclipse		is when the Earth’s shadow is on the moon
Photosphere		the middle layer of the sun’s atmosphere
Ellipse		is when the moon’s shadow is on the Earth blocking the sun
Orbit		an oval shape that may be elongated or nearly circular
Chromosphere		model of the solar system that the planets revolve around the sun.
Solar Flare		when a body revolves around another body in space