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calendar
(Encyclopedia)calendar [Lat., from Kalends], system of reckoning time for the practical purpose of recording past events and calculating dates for future plans. The calendar is based on noting ordinary and easily o...De la Rue, Warren
(Encyclopedia)De la Rue, Warren dĕlˈəro͞o, dĕləro͞oˈ [key], 1815–89, British scientist and inventor. Especially noted as an astronomer, he was a pioneer in celestial photography. He adapted the wet-plate ...Borschberg, André
(Encyclopedia)Borschberg, André, 1952–, Swiss engineer, businessman, and pilot. With Bertrand Piccard (see under Piccard, Auguste) he founded Solar Impulse to develop a solar-powered plane capable of circumnavig...heating
(Encyclopedia) CE5 Typical warm-air heating system heating, means of making a building comfortably warm relative to a colder outside temperature. Old, primitive methods of heating a building or a room within it ...terrestrial planet
(Encyclopedia)terrestrial planet, the earth or a planet that resembles the earth in its physical characteristics. The terrestrial planets in the solar system are the earth, Mercury, Venus, and Mars. These planets a...gegenschein
(Encyclopedia)gegenschein gāˈgənshīnˌ [key] or counterglow, a slight brightening of the night sky in the region of the zodiac directly opposite the sun, i.e., 180° from the sun. Discovered by the Danish astro...Bode, Johann Elert
(Encyclopedia)Bode, Johann Elert yōˈhän āˈlĕrt bōˈdə [key], 1747–1826, German astronomer. From 1772 to 1825 he was astronomer of the Academy of Science, Berlin, and from 1786, director of the Berlin Obse...planetary science
(Encyclopedia)planetary science or planetology, study of planets and planetary systems as a whole. Planetary science applies the theories and methods of traditional disciplines such as astronomy, geology, physics, ...mean solar time
(Encyclopedia)mean solar time: see solar time. ...apparent solar time
(Encyclopedia)apparent solar time: see solar time. ...Browse by Subject
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