Daily Question 11/29/11 What are the 4 constellations in the Winter W? What are the 4 constellations in the Winter W? What are the 5 constellations in the Circumpolar Constellations? What are the 5 constellations in the Circumpolar Constellations? What is the brightest star in the night’s sky? What is the brightest star in the night’s sky? 1.Taurus, Canis Major, Canis Minor, Orion 2.Cepheus, Cassiopeia, Draco, Ursa Major, Ursa Minor 3.Sirius

Telescopes Please get out a piece of paper and a pencil

A Telescope is a device that makes distant objects appear to be closer. A Telescope is a device that makes distant objects appear to be closer. Made famous by Galileo Made famous by Galileo Telescopes are also instruments that collect and focus light and other forms of electromagnetic radiation. Telescopes are also instruments that collect and focus light and other forms of electromagnetic radiation. Energy that can travel through space in the form of waves (ex.light) Energy that can travel through space in the form of waves (ex.light)

Forms of Electromagnetic Radiation Electromagnetic Spectrum site

Daily Question 11/30/11 Telescopes are used to focus light and what other form of energy? Telescopes are used to focus light and what other form of energy? Gamma rays have the ____________ wavelengths while radio waves have the __________ wavelength. Gamma rays have the ____________ wavelengths while radio waves have the __________ wavelength. Put together a list of all the things you would need to make a peanut butter and jelly sandwich. Put together a list of all the things you would need to make a peanut butter and jelly sandwich.

Wavelengths Measured from top to top or bottom to bottom Measured from top to top or bottom to bottom Light from stars travel to Earth as light waves Light from stars travel to Earth as light waves Each color is a different wavelength Each color is a different wavelength

Daily Question 12/05/11 Which part of the electromagnetic spectrum can you see? Which part of the electromagnetic spectrum can you see? What is used in refracting telescopes to collect light and magnify images? What is used in refracting telescopes to collect light and magnify images? What is used in reflecting telescopes to collect and focus light? What is used in reflecting telescopes to collect and focus light? Visible light spectrum Visible light spectrum Lenses Lenses A mirror A mirror

Types of Telescopes Optical Telescopes are telescopes that uses lenses or mirrors to collect and focus visible light. Optical Telescopes are telescopes that uses lenses or mirrors to collect and focus visible light. Two types Two types Refracting Telescopes Refracting Telescopes Reflecting Telescopes Reflecting Telescopes reflecting vs refracting telescopes reflecting vs refracting telescopes reflecting vs refracting telescopes reflecting vs refracting telescopes Non-optical telescopes collect and focus different types of electromagnetic radiation. Non-optical telescopes collect and focus different types of electromagnetic radiation.

Refracting Telescopes Uses a convex lens to gather and focus light. Uses a convex lens to gather and focus light. Convex lens is a piece of transparent glass curved so that the middle is thicker than the edges Convex lens is a piece of transparent glass curved so that the middle is thicker than the edges

Reflecting Telescopes Uses a curved mirror to collect and focus light. Uses a curved mirror to collect and focus light. Mirror focuses the large amount of light onto a small area. Mirror focuses the large amount of light onto a small area.

Types of Non-Optical Telescopes Radio Telescopes Detect radio waves emitted by stars X-ray Detects X rays Used in space

Telescopes Ultra-violet telescopes Ultra-violet telescopes Detect ultra violet rays Detect ultra violet rays Used in space Used in space Infrared telescopes Infrared telescopes Examine infrared radiation from stars Examine infrared radiation from stars Used in space Used in space

Observatories A building that contains one or more telescopes A building that contains one or more telescopes Built on mountaintops because it is clearer at higher elevations than at sea-level Built on mountaintops because it is clearer at higher elevations than at sea-level

Space Telescopes Hubble Space Telescope Hubble Space Telescope Has a mirror 2.4 meters in diameter Has a mirror 2.4 meters in diameter Collects visible light images, along with ultraviolet and Infared. Collects visible light images, along with ultraviolet and Infared. Chandra X-Ray Telescope Chandra X-Ray Telescope Spitzer Space Telescope Spitzer Space Telescope Infrared portion of the spectrum Infrared portion of the spectrum