Astronomy

Define the big bang using your own words: A solar theory holding that the universe originated around 20 billion years ago from the violent explosion of a very small group of matter of extremely high density and temperature.

Define: Hubble telescope and add a picture of it, see if there is gadget to add for telescope:The Hubble Space Telescope (HST) is a space telescope that was carried into orbit by the space shuttle in April 1990.

*Meteorite:A meteorite is a natural object originating in outer space that survives an impact with the Earth's surface.

*Planet:A body of great size but not massive enough for nuclear reactions to ever occur. They orbit a star. EX. like Earth

*Star: A celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior.

*Sun spot: Are dark ares on the sun that are cooler than the rest of the sun.

*Scientific Notation and show an example:A short-hand way of writing very large or very small numbers. The notation consists of a decimal number between 1 and 10 multiplied by an integral power of 10. For example, 47,300 = 4.73 x 4 ; 0.000000021 = 2.1 x 10 -8
*Light year:The distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
*Galaxy:A collection of star systems; any of the billions of systems each having many stars and nebulae and dust; "`extragalactic nebula' is a former name for `galaxy'"

*Celestial pole:One of two points of intersection of the Earth's axis and the celestial sphere

*Spectroscopy: The study of the way in which atoms absorb and emit electromagnetic radiation. Spectroscopy allows astronomers to determine the chemical composition of stars.

*Telescope:A magnifier of images of distant objects.

*Constellation:A group of stars that make a shape, often named after mythological characters, people, animals, and things.