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Luna, Our Moon. Galileo was first to discover large mountains among craters called lunar highlands Dark regions, known as maria, are a result of lava cooling in low areas. Moon’s Rotation and Revolution. rotation and revolution occur once every 27.3 days - PowerPoint PPT Presentation
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Luna, Our Moon
• Galileo was first to discover large mountains among craters called lunar highlands
• Dark regions, known as maria, are a result of lava cooling in low areas
Moon’s Rotation and Revolution
• rotation and revolution occur once every 27.3 days
• due to rotation and revolution being the same speed, one side of the moon is always visible and the other side is never seen
• moonlight is actually reflected sunlight
Tides
• Moon’s gravity pulls on Earth, with places on Earth closer to the moon results in harder pulling
• Bulges occur on the sides of Earth closet to and farthest from moon (high tides)
• As the Earth rotates, different areas experience high and low tides
Sun’s Effect on Tides
• Sun has about ½ tide generating force as Moon
• When Sun, Moon, and Earth are aligned, high tides are higher and low tides are lower (spring tide)
• When Sun, Moon, and Earth are at 90 degrees, high tide lower and low tide higher (neap tide)