Interesting data for kids

Planetary science  or, more rarely,  planetology , is the scientific study of  planets  (including  Earth ),  moons , and  planetary systems  (in particular those of the  Solar System ) and the processes that form them. It studies objects ranging in size from  micrometeoroids  to  gas giants , aiming to determine their composition, dynamics, formation, interrelations and history. It is a strongly  interdisciplinary  field, originally growing from  astronomy  and  earth science , but which now incorporates many disciplines, including  planetary geology  (together with  geochemistry  and  geophysics ),  cosmochemistry ,  atmospheric science ,  oceanography ,  hydrology ,  theoretical planetary science ,  glaciology , and  exoplanetology . [1]  Allied disciplines include  space physics , when concerned with the effects of the  Sun  on the bodies of the Solar System, and  astrobiology . There are interrelated observational and theoretical branches of planetary science. Observational

A camcorder records  a scene as a sequence of 25 or 30 still images per second, along with sound . It comprised a video camera to capture  light from the scene , a view finder through which the scene may be viewed, a screen on which the record scene may be viewed, a charge couple device (ccd). to convert the visual data into an electrical signal, and a means of storing a signal. Digital video cameras convert the signal into digital form- a series of separate measurements of the initial analogue (continuously varying) signal. They record the digital  signal, usually on a chip or hard disk. Camcorders  often have a slot where a memory card can be inserted to expand the memory and store longer recordings or more still pictures.