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7-1 HMS astronomy test 4/8/09

Don't freak anymore!!
STUDY
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between corona and photospher in sun
chromosphere
gases circulate here, rising the sun's energy
convective zone
a closed curve where the distance is always the same
ellipse
the system composed of the sun and other bodies that travel around it
solar system
for seeing in space
astronomical telescope
eliptical motion of a body in space orbiting
revolution
eliptical path a body takes as it travels around another body
orbit
the spinning of a body on its axis
rotation
a large cloud of dust and gas in interstellar space
nebula
a telescope that uses curved mirrors to gather and focus light
reflecting telescope
imaginary circle created by extending earth's equator into space
celestial equator
all the wavelengths of electromagnetic radiation
electromagnetic spectrum
a measure of how north or south an object is from the celestial equator
declination
a system for organizing time
calendar
a year in which an extra day is added
leap year
the time required for the earth to rotate once on its axis
day
a measure of how far east from the sun point on the first day of spring
right ascension
the study of all physical objects beyond earth
astronomy
the time required for the earth to orbit the sun once
year
roughly the amount of time for the moon to orbit the earth once
month
a section of the sky that contains a recognizable star pattern
constellation
a unit of length equal to the distance that light travels through space in one year
light-year
the angle between an object in the sky and the horizon
altitude
the apparent path the sun takes across the celestial sphere
ecliptic
an instrument used to closer view the sky and beyond
telescope
a telescope used to see things on the ground
Terrestrial telescope
A telescope that uses a set of lenses to gather and focus light
refracting telescope
average distance between the earth and sun
astronomical unit
atom-packed part of the sun that can take millions of years to get through
radiative zone
an area of the photosphere of sun, cooler than surrounding areas showing a dark spot
sun spot
two nuclei that form together to make a larger source of energy
nuclear fusion
surface of sun; thick see-able gasses
photosphere
the thin outermost layer of the earth, the uppermost part of the lithosphere
crust
outer layer of sun- can equal 12 times the diameter
corona
the layer of earth between crust and core
mantle
the tiny building blocks of planets, dust particles that grew
planetismal
time it takes for a body to make an orbit
period of revolution
the central, spherical part of the earth, below mantle
core
the nebula that formed into the solar system
solar nebula