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What tools do we use in studying the Universe?
Presentation by: Martin Benjamin V. Torres
Optical Telescopes• 1608, credited to Hans Lippershey,
German-Dutch spectacle maker• Isaac Newton first practical
telescope• Galileo first used for astronomy• astronomical telescope gathers and
records light• records mainly visible part of
electromagnetic spectrum• images magnified for proper viewing• mirrors act as lens
Parts of a telescope
• objective lens– collects lots of light from a
distant object and brings that light to a point or focus
• eyepiece/focus lens– takes the bright light
from the focus and magnifies it
Communication satellites
• Communication satellites allow radio, television, and telephone Transmissions to be sent live anywhere in the world.
• Communication satellites are often in geostationary orbit
Other examples of telescopes…• radio telescope
– operates on radio frequency– detects radio emission
• Infrared – uses infrared light to detect cosmic bodies– infrared radiation is heat
Electromagnetic Spectrum
• range of all possible frequencies electromagnetic radiation
• radiation- energy that travels through vacuum and matter
Satellites
• a satellite is an artificial object which has been intentionally placed into orbit
• it is mainly use for communication
Astronomy satellites
• an Astronomy satellite is basically a very big telescope
• Astronomy satellites, therefore, can see into space ten times better than a telescope
Landers
• A lander is a spacecraft which descends toward and comes to rest on the surface of an astronomical body
• The landing occurs after atmospheric entry and the lander is first a re-entry vehicle
Star maps
• The star map was produced by the Star Maps on demand service of Mount Wilson Observatory
• Another source of star maps is the Starry night program for windows and Macintosh computers
• A star map is a map of the night sky
Spacecraft
• A space craft is a vehicle, vessel or machine to fly in outer space
• Spacecraft are used for communicating, earth observation, meteorology and transportation
Thank you for listening
References
• http://satellites.spacesim.org/english/engineer/copy/• http://www.optcorp.com/articles/optical-telescope/• http://science.howstuffworks.com/telescope1.htm• http://abyss.uoregon.edu/~js/glossary/radio_telescope.html• http://www2.ifa.hawaii.edu/newsletters/article.cfm?a=123• http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html• http://www.nasa.gov/audience/forstudents/5-8/features/what-is-a-satellit
e-58.html#.VAXnOPmSzUg• http://satellites.spacesim.org/english/engineer/copy/• http://www.yourdictionary.com/lander• http://csep10.phys.utk.edu/astr161/lect/time/maps.html• http://mrsharmonscience.weebly.com/uploads/1/3/2/2/13222665/compl
eted_space_tool_chart.pdf• http://www.answers.com/Q/What_is_a_spacecraft
Quiz
1.) It is a tool that captures and magnifies light that allows you to see far away things in detail.
2.) A moon, planet or machine that orbits a planet or star.
3.) They are small robots that explore Mars.4.) It is used to deliver people and supplies to space.5.) FULL SENTENCE- What is the objective lens for?