7-1 HMS astronomy test 4/8/09

39 terms by HMSSCspirit-athletics

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Don't freak anymore!!

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

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