German astronomer, known for the bogus “ Bode’s Law” which attempts to explain the sizes of the planetary orbits. I use the American version of “billion” which means 1,000,000,000 (1e9) not the British version which means 1e12. The local name for Mars in Edgar Rice Burroughs’ SF books. = 0.987 atmosphere = 1.02 kg/cm^2 = 100 kilopascal = 14.5 lbs/square inch.Īmerican astronomer discovered Jupiter’s satellite Amalthea and Barnard’s star, the second-nearest star system to the Sun. A similar effect happens in the southern hemisphere where it is known as the aurora australis. The “Northern Lights” caused by the interaction between the solar wind, the Earth’s magnetic field and the upper atmosphere. (Latin for “dawn”) a glow in a planet’s ionosphere caused by the interaction between the planet’s magnetic field and charged particles from the Sun = 1.013 bars = 1.03 kg/cm^2 = 14.7 pounds per square inch, standard atmospheric pressure at sea level on Earth. 1 AU is a long way - at 100 miles per hour (160 kph) it would take over 100 years to go 1 AU. = 149,597,870.691 km the average distance from the Earth to the Sun. It has no particular meaning except that asteroid N+1 was discovered after asteroid N. (also “planetoid”) a medium-sized rocky object orbiting the Sun smaller than a planet, larger than a meteoroidĪsteroids are assigned a serial number when they are discovered. Just a few minutes after their search began, d’Arrest cried out, “That star is not on the map!” and earned his place in the history books. With Galle at the eyepiece and d’Arrest reading the chart, they scanned the sky and checked that each star seen was actually on the chart. After receiving its predicted position from Le Verrier, Galle and d’Arrest began searching. Having the form of a bow curved arc-shapedĪrago, Dominique François Jean 1786 – 1853įrench astronomer and physicist and Director of the Paris Observatory, who discovered the phenomenon of the production of magnetism by rotationĭanish astronomer who assisted Galle with the first observations of Neptune. The point in its orbit where a planet is farthest from the Sun when refering to objects orbiting the Earth the term apogee is used the term apoapsis is used for orbits around other bodies. The point that is directly on the opposite side of the planet The ratio of the amount of light reflected by an object and the amount of incident light a measure of the reflectivity or intrinsic brightness of an object (a white, perfectly reflecting surface would have an albedo of 1.0 a black perfectly absorbing surface would have an albedo of 0.0).Ī dark or light marking on the surface of an object that may not be a geological or topographical feature. Galle confirmed the existence of Neptune based on independent calculations done by Le Verrier. But, unfortunately, Adams did not publish his prediction. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z LinksĪccumulation of dust and gas into larger bodies such as stars, planets and moons.Įnglish astronomer and mathematician who, at the age of 24, was the first person to predict the position of a planetary mass beyond Uranus.
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