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Wray, John

(Encyclopedia) Wray, John: see Ray, John.

polarization of light

(Encyclopedia) polarization of light, orientation of the vibration pattern of light waves in a singular plane. Unpolarized light can be converted into a single polarized beam by means of the Nicol…

observatory, orbiting

(Encyclopedia) observatory, orbiting, research satellite designed to study solar radiation, electromagnetic radiation from distant stars, the earth's atmosphere, or the like. Because the atmosphere…

virtual observatory

(Encyclopedia) virtual observatory, a collection of integrated astronomical data archives and software tools that utilize computer networks to create an environment in which research can be conducted…

DK Science & Technology: Lenses

WHAT DOES A LENS DO? WHAT IS THE DIFFERENCE BETWEEN A MICROSCOPE AND A TELESCOPE? CONVEX LENSCONCAVE LENSFIND OUT MOREWhen you look through a magnifying glass, or take a picture with a camera, you…

DK Science: Light

WAVES AND PARTICLESLIGHTHOUSETRANSMISSION OF LIGHTLIGHT SOURCESSHADOWSFIND OUT MORELight makes the world seem bright and colourful to our eyes. Light is a type of electromagnetic radiation that…

neutron star

(Encyclopedia) neutron star, extremely small, extremely dense star, with as much as double the sun's mass but only a few miles in radius, in the final stage of stellar evolution. Astronomers Baade…