Transcript Astronomyx

Astronomy
By: Shannon Allen
Vocabulary
• Calendar - a system for organizing time
• Year – the time required for the earth to orbit the
sun once
• Month – roughly the amount of time required for
the moon to orbit the earth once
• Day- the time required for the earth to rotate on
its axis
• Leap Year – a year in which an extra day is added
to the calendar
Vocabulary
• Leap Year – a year in which an extra day is added to the calendar
• Constellations – sections of the sky that contain recognizable star
pattern
• Altitude – the angle between the object and the horizon
• Right Ascension – a measure of how far east an object is from the
point at which the sun appears on the first day of spring
• Declination – a measure of how far north or south an object is
from the celestial equator
• Celestial Equator – an imaginary circle created by extending
earth’s equator into space
Vocabulary
• Light-Year – a unit of length equal to the distance that
light travels through space in 1 year
• Telescope – an instrument that collects electromagnetic
radiation
• Refracting Telescope – a telescope that uses a set of
lenses to gather and focus light
• Reflecting Telescope – a telescope that uses curved
mirrors to gather and focus light
• Electromagnetic Spectrum – made of all of the
wavelength of electromagnetic radiation
Calendars
Calendar - a system for organizing time
Constellations
Constellations – sections of the sky
that contain recognizable star pattern
Celestial Equator
Celestial Equator – an
imaginary circle created by
extending earth’s equator
into space
Light Year
Light-Year – a unit of length equal to the
distance that light travels through space in 1
year
Telescopes
Telescope – an instrument that collects
electromagnetic radiation
Refracting Telescope – a telescope that uses a
set of lenses to gather and focus light
Reflecting Telescope – a telescope that uses
curved mirrors to gather and focus light
Electromagnetic
Spectrum
Electromagnetic Spectrum – made of all of the
wavelength of electromagnetic radiation
The End