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Vocab 27 Chp.

Chapter 29 Vocab

TermDefinition
Electromagnetic spectrumm All types of electromagnetic radiation arranged according to wavelength an frequency.
Refracting telescope Telescope that uses lenses to focus visible.
Reflecting telescope Telescope that uses mirrors to focus visible light
Interferometry Process that links separate telescopes so they act as one telescope producing more detailed images as the distance between them increases.
albedo Percentage of sunlight that is reflected by the surface of a planet or a satellite such as the Moon.
highland Light-colored, mountainous heavily cratered area of the moon composed mostly of lunar breccias.
maria Dark-colored smooth plains on the Moon surface.
impact crater Crater formed when space material impacted on Moon's surface.
ejecta Material that falls back to the lunar surface after being blasted out by the impact of the space object.
ray Long trail of ejecta that radiates outward from a moon crater.
rille Valley Like structure that meanders across some regions of the moon's maria.
regolith Layer of loose ground up rock on the lunar surface.
ecliptic plane Plane of Earth's orbit around the Sun.
solstice The sun is overhead at its farthest distance either north or south of the equator
equinox Time of year during which Earth's axis does not point directly toward the sun;; both hemispheres receive exactly 12 hours of sunlight and the Sun is directly overhead at the equator
synchronous rotation The state at which the moons orbital and rotational periods are equal.
solar eclipse When the moonpasses between earth and the sun and the moon casts a shadow on earth blocking earth's view of the sun can be partial or total
perigee closest point in the moon's elliptical orbit to Earth.
apogee Farthest point in the Moon's elliptical orbit to Earth.
lunar eclipse When Earth passes between the Sun and the Moon and Earth's shadow falls on the Moon occurs only during a full Moon.
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