Describing the universe
Electromagnetic Spectrum and Telescope
What is Astronomy?
Objectives:
1.Identify the visible and no visible parts of the Electromagnetic Spectrum.
2.Compare refracting telescope and reflecting telescopes.
3.Explain how telescopes for no visible Electromagnetic radiation differ from light telescope.
Astronomy Vocabulary
UniverseUniverse is made of planets, stars and galaxies | Light YearA Light Year also use the speed of light to measure distance light at 300,000 km. light year is used to measure from beyond our universe | Astronomical UnitThe average distance between the earth and the sun; approximately 150 million kilometers(A.U.) |
Light Year
A Light Year also use the speed of light to measure distance light at 300,000 km. light year is used to measure from beyond our universe
Electromagnetic SpectrumAll of the frequinces or wavelengths of electromagnetic spectrum. | Refracting TelescopesA telescope that uses a set of lenses to gather and focus light from distan object. | Reflecting TelescopesA telescope that uses a curved mirror to gather and focus light from distant objects. |
Refracting Telescopes
A telescope that uses a set of lenses to gather and focus light from distan object.
Describe the Electromagnetic Spectrum

Comparing a Refracting Telescope and Reflecting Telescope
Invisible light telescope
