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Robins Astronomy

Astronomy

QuestionAnswer
The theory that describes the formation and expansion of the Universe. The Big Bang Theory
The theory that describes the steps involved in the creation of solar systems. Nebular Theory
The totality of all matter. Universe
The model of the solar system we use today, with the sun in the center. Heliocentric
The old (incorrect) model of the solar system with the earth in the center. Geocentric
All planets orbit in an ellipse with the sun at one focus. Kepler's 1st Law
All planets sweep equal area in equal time. When the planet is nearest the sun, it moves faster. When the planet is farther from the sun, it moves slower. Kepler's 2nd Law
The planets orbital period (time) is proportional to it's distance from the sun (distance). Time squared equals distance cubed. Kepler's 3rd Law
The balance point between two planetary objects. Barycenter
The turning on an axis. Earth turns on its axis every 24 hours. Rotation
The orbiting of one planetary body around another. Earth orbits the sun every 365 days. Revolution
The slow turning of the Earth's axis from one star to another over a 26,000 year period. Precession
The slight wobbling of the Earth as it turns in its precession. Occurs every 18 years (1/2 a degree). Nutation
The tidal extreme caused by the Earth, moon, and sun in a straight alignment. Spring Tide
Weaker tidal range caused by the Earth, moon, and sun in a perpendicular (not straight) alignment. Neap Tide
The tilt of the Earth on its axis. The reason that seasons exist on Earth. 23.5 degrees
The splitting of particles to create energy (nuclear reactions) Fission
The fusing of elements to create energy (occurs in sun) Fusion
The name of the waves that travel from the sun. Electromagnetic Spectrum
A set of planetary bodies orbiting around a star. Solar System
The 3rd planet in our solar system. Earth
The source of all energy on Earth. Sun
The process by which plants convert radiant energy (solar) into chemical energy (sugar). Photosynthesis
Anything that has mass and takes up space. Matter
When Earth is at its closest point to the sun (January 3rd) Perihelion
When Earth is at its farthest point from the sun (July 4th) Aphelion
Created by: debrobins
Popular Earth Science sets

 

 



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