astronmomy
the study of the univervse
year
the time requaied for earth to rotate around the earth
month
a disvison of a year
day
the time for the earth to roate around the earth
telescope
a interment that collects eleconmight radtaion
refracring telescope
a telescope that uses a set of lenses to veiw light better
reflacting telescope
a telescope that uses a curved mirror
electromagnginic spectrum
all of the fquiqes of wavelengraths