Tools for Observation.

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Presentation transcript:

Tools for Observation

Human Eye CORNEA - The transparent front part of the eye that covers the iris, pupil, and anterior chamber. The cornea is an essential part of the focusing in your eye. PUPIL - The variable-sized, black circular or slit shaped opening in the center of the iris that regulates the amount of light that enters the eye. LENS - A transparent, biconvex (lentil-shaped) structure in the eye that, along with the cornea, helps to reflect light to be focused on the retina. RETINA - A thin layer of neural cells that lines the back of the eyeball. It is comparable to the film in a camera OPTIC NERVE - The nerve that transmits visual information from the retina to the brain. Source: www.wikipedia.com

The retina Rods detect light and dark A cones detects either Red, Blue, or green Cones concentrated at the center Rods at outside of eye

Cone sensitivity

Ha, Ha! Visible Spectrum of Light!!!

Humans have developed tools to see things better…. Galilean Telescope

Camera

Space Telescopes Hubble Space Telescope (HST)

Trapezium (Orion nebula): Hubble Space Telescope

Telescope, Cassini: Moon

Yellow filter, digital camera, 6’’ telescope: Sun

Mars as seen by HST

Star forming region in the Large Magellanic Cloud (LMC) from HST

Film camera, 800mm lens: Comet Swan

HST, M31 (Andromeda galaxy)

Bullet Nebula (HST Chandra X ray) Is this a “true color” image? Why was this image taken as an “X ray” photo?