Science final (space stuff)

21 terms by ieatmydoodoo 

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chapter 18 (i think) the one that says chapter test a : studying spacemonth

copernicus

created a sun-centered theory of the universe

hubble

proved that there were many galaxies

newton

showed that gravity keeps planets and moons in orbit

ptolemy

created an earth-centered theory of the universe

kepler

showed that planets move in elliptical orbits around the sun

galileo

was one of the first astronomers to use a telescope to observe in space

month

roughly, the time required for the moon to orbit once around the earth

refracting telescope

an instrument that uses a set of lenses to focus light

altitude

the angle between an object in the sky and the horizon

day

the time required for the earth to rotate once on its axis

horizon

the line where the sky and the earth appear to meet

constellation

a region of the sky that contains a recognizable

year

the time required for the earth to orbit once around the sun

ecliptic

the apparent path of the sun across the celestial sphere as seen from earth

declination

one can tell how far north or south an object is from the celestial equator by the object's _______

celestial sphere

the imaginary sphere, created by scientists, that surrounds the earth

electromagnetic spectrum

all of the wavelengths of electromagnetic radiation

In Space

where scientists put telescopes to avoid interference from earth's atmosphere

zenith

an imaginary point directly above an observer's head.

the very large array

the largest telescope.

right ascension

the vernal equinox is used to establish a star's_____

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