an arrangement of all of the electrmatic waves according to frequeny and wavelength?
electromagnetic spectrum
what is the lowest frequency?
radio waves
what satelite microwaves use?
microwaves
what wave produces head and warmth
infrared waves
near infrared visible light near ultraviolent?
optical window
can cause sunburns or cancer
ultraviolet
xray machines?
xrays
to treat cancer also in nuclear stuff
gamma rays
most important instrament, and theirs 2 basic types?
teliscope
out of the 2 telescopes which one uses lens to gather the image, collects light and bends the rays and the eye piece magnify the image?
refracting telescope
out of the 2 telescopes which one uses a large curved mirror and lenses, produces a sharper image, mirrors are cheaper than lens, largest is in Hawaii, and has a 10 meter diamiter mirror
reflecting teliscope
instrament that spits light into a spectrom so we can see colors
spectroscope
instrments that collect radio waves from space
radio telescopes
rotating stars
pusars
the apparent dome of the night sky in which the stars are attached
celestrial sphere
seperates the visible portion of the sky with the part we can not see
horizon
the point on the celestial sphere directly above the observer
zenith
point directly bellow the observer?
nadir
imaginary line encircles the heaves midway between the celestial pole?