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Chapter 27 Sun-Earth-Moon System

Across
Heavily cratered regions of the moon that are light in color and mountainous
Telescopes that bring visible light to a focus with mirrors
Long trails of ejecta that radiate outward from the impact site
Formed when objects from space crashed into the lunar surface
All types of electromagnetic radiation arranged according to wavelength and frequency
State at which its orbital and rotational periods are equal
Occurs when the moon passes directly between the Sun and the Earth and blocks the Sun from view
Closest point in the Moon's orbit
Valleylike structures that might be collapsed lava tubes
The furthest point in the Earth's orbit
Sun is overhead at its farthest distance either north or south of the equator
Down
Plane of Earth's orbit
Technique that uses the images from several telescopes to produce a single image
First telescopes invented in 1608 using lenses to bring visible light to a focus
Material blasted out during these impacts and fell back to the moon's surface
Dark, relatively smooth plains, which average 3 m lower in elevation
Occurs when the moon passes behind Earth in relation to the sun and through Earth's Shadow
Percentage of incoming sunlight that reflects
Layer of loose, ground up rock
Earth's axis is perpendicular to the sun's rays and noon is directly overhead at the equator