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Unit 1- Astronomy

Test Review

QuestionAnswer
altitude the angle between an object in the sky and the horizon
constellation a region of the sky that contains a recognizable star pattern and that is used to describe the location of objects in space
right ascension a measure of how far east an object is from the vernal equinox
declination a measure of how far north or south an object is from the celstial equator
ecliptic the apparent path of the sun across the sky throughout the year
month a division of the year that is based on the orbit of th emoon around the Earth
year the time required for the Earth to orbit once around the sun
horizon the line where the sky and the Earth appear to meet
zenith the point in the sky directly above an observer on Earth
Kepler assistant to Brahe; announced that all planets revolved around the sun in elliptical orbits
Galileo one of the first people to use a telescope to observe objects in the sky; discovered craters and mountains on the Earth's moon
Copernicus believed in a sun-centered universe
Hubble proved that other galaxies existed beyond the Milky Way
Ptolomy Greek astronomer who believed in an Earth-centered universe with all planets revolving around it
Newton His laws of gravity explained that all objects in the universe attract each other through gravity- this is why the planets stay in orbit
Brahe Earth-centered universe with sun and moon revolving around it; all other planets revolve around the sun
Radio Waves used to transmit radio and television signals
Microwaves used in communication; radar, and to warm food
Infrared Waves means "below red" used to all things give off some amount of infrared waves
Visible Light the only part of the spectrum you can actually see; ROYGBIV
Ultraviolet Light Good Effect= kills bacteria; Bad Effect= can cause cancer
X-Rays useful in the medical field and to scan baggage at the airport
Gamma Rays used to treat some forms of cancer
Created by: tclendaniel
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