Daily Question 11/29/11Daily 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 What are the 5 constellations in the Circumpolar

Constellations?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, Orion2. Cepheus, Cassiopeia, Draco, Ursa Major, Ursa Minor 3. Sirius

TelescopesTelescopes

Please get out a piece of paper Please get out a piece of paper and a penciland a pencil

A Telescope is a device A Telescope is a device that makes distant that makes distant objects appear to be objects appear to be closer.closer. Made famous by GalileoMade famous by Galileo

Telescopes are also Telescopes are also instruments that collect instruments that collect and focus light and other and focus light and other forms of electromagnetic forms of electromagnetic radiation.radiation. Energy that can travel Energy that can travel

through space in the form through space in the form of waves (ex.light) of waves (ex.light)

Forms of Electromagnetic Forms of Electromagnetic RadiationRadiation

Electromagnetic Spectrum site

Daily Question 11/30/11Daily Question 11/30/11

Telescopes are used to focus light and Telescopes are used to focus light and what other form of energy?what other form of energy?

Gamma rays have the ____________ Gamma rays have the ____________ wavelengths while radio waves have the wavelengths while radio waves have the __________ wavelength.__________ wavelength.

Put together a list of all the things you Put together a list of all the things you would need to make a peanut butter and would need to make a peanut butter and jelly sandwich.jelly sandwich.

WavelengthsWavelengths

Measured from top to Measured from top to top or bottom to top or bottom to bottombottom

Light from stars travel Light from stars travel to Earth as light to Earth as light waveswaves

Each color is a Each color is a different wavelengthdifferent wavelength

Daily Question 12/05/11Daily Question 12/05/11

Which part of the electromagnetic Which part of the electromagnetic spectrum can you see?spectrum can you see?

What is used in refracting telescopes to What is used in refracting telescopes to collect light and magnify images? collect light and magnify images?

What is used in reflecting telescopes to What is used in reflecting telescopes to collect and focus light?collect and focus light?

Visible light spectrumVisible light spectrumLensesLensesA mirrorA mirror

Types of TelescopesTypes of Telescopes

Optical Telescopes are telescopes that Optical Telescopes are telescopes that uses lenses or mirrors to collect and focus uses lenses or mirrors to collect and focus visible light.visible light.Two typesTwo types

Refracting TelescopesRefracting TelescopesReflecting TelescopesReflecting Telescopesreflecting reflecting vsvs refracting telescopes refracting telescopes

Non-optical telescopes collect and focus Non-optical telescopes collect and focus different types of electromagnetic different types of electromagnetic radiation.radiation.

Refracting TelescopesRefracting 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 Convex lens is a piece of transparent glass curved so that the middle is thicker than the curved so that the middle is thicker than the edgesedges

Reflecting TelescopesReflecting Telescopes

Uses a curved mirror Uses a curved mirror to collect and focus to collect and focus light.light. Mirror focuses the Mirror focuses the

large amount of light large amount of light onto a small area.onto a small area.

Types of Non-Optical TelescopesTypes of Non-Optical Telescopes

Radio TelescopesRadio Telescopes Detect radio waves Detect radio waves

emitted by starsemitted by stars

X-ray X-ray Detects X raysDetects X rays Used in spaceUsed in space

TelescopesTelescopes

Ultra-violet telescopes Ultra-violet telescopes Detect ultra violet raysDetect ultra violet rays Used in spaceUsed in space

Infrared telescopesInfrared telescopes Examine infrared Examine infrared

radiation from starsradiation from stars Used in spaceUsed in space

ObservatoriesObservatories

A building that A building that contains one or more contains one or more telescopestelescopes

Built on mountaintops Built on mountaintops because it is clearer because it is clearer at higher elevations at higher elevations than at sea-levelthan at sea-level

Space TelescopesSpace Telescopes

Hubble Space TelescopeHubble Space Telescope Has a mirror 2.4 meters in Has a mirror 2.4 meters in

diameterdiameter Collects visible light Collects visible light

images, along with images, along with ultraviolet and Infared.ultraviolet and Infared.

Chandra X-Ray Chandra X-Ray TelescopeTelescope

Spitzer Space TelescopeSpitzer Space Telescope Infrared portion of the Infrared portion of the

spectrumspectrum