astronomy Flashcards
astronomy
study the space
year
thee time required for the earth to orbit once around the sun
month
a division of the year that is based on the orbit of the moon around the earth
day
the time required for the earth to rotate once on its axis
telescope
an instrument that collects electromagnetic radiation
refracting telescope
a telescope that uses a set of lens
reflecting telescope
a telescope that uses a curved mirror to gather and
focus light
electromagnetic spectrum
all of the frequencies or wavelengths
constellation
a region of the sky that contains a recognizable star pattern and that is used to describe the location of
objects in space.
zenith
the point in the sky directly above an observer on earth
altitude
the angle between an object in sky and the horizon
horizon
the line where the sky and the earth appear to meet