Absorption
The process by which nutrient molecules pass through the wall of the digestive system into the blood
spectrum
A broad range of nevertheless related qualities or ideas, esp. those that overlap to create a continuous series (as in a color spectrum, where each color blends into the next in a continuous way)
blue shift
the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
celestial sphere
An imaginary sphere surrounding Earth to which the stars are attached
constilation
a group of stars that appear to form a pattern in the sky
corona
The outer layer of the sun's atmosphere.
cresent moon
when the moon is less than 1/2 full
Doppler effect
An observed change in the frequency of a wave when the source or observer is moving
emission spectrum
a spectrum of the electromagnetic radiation emitted by a source.
Eyepiece
A lens that magnifies the image formed by the objective.
full moon
moon phase when the entire side facing Earth is illuminated.
Geocentric
A model of the universe in which Earth is at the center of the revolving planets and stars.
gibbous moon
when the size of the illuminated portion of the moon is greater than half but not a full moon,
lasts about 6 days can be almost all white or just a little more than 1/2 white
Heliocentric
Based on the belief that the sun is the center of the universe
Inertia
The tendency of an object to resist a change in motion
light pollution
human-made light that hinders astronomical observations
lunar eclipse
the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
New Moon
Moon phase that occurs when the Moon is between Earth and the Sun, at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth.
objective lens
The lens on a light microscope that is closest to the stage.
Parallex
the apparent change in position of an object when seen from different places
Penumbra
The part of a shadow surrounding the darkest part
planet
A large body in space that orbits a star and does not produce light of its own
red shift
(astronomy) a shift in the spectra of distant galaxies toward longer wavelengths
reflecting telescope
A telescope that uses a curved mirror to collect and focus light
refracting telescope
A telescope that uses convex lenses to gather and focus light
Resolution
determination
retrograde motion
the apparent westward motion of the planets with respect to the stars
Revolution
The movement of an object around another object
Rotation
The spinning of Earth on its axis
Solar Eclipse
Moon passes directly between the sun and the Earth.
spectrum
an ordered array of colors.
umbra
The darkest part of a shadow
Waning
becoming less bright, intense, or strong