best spy app for mobile phones apk spy physical location tracker software for android phones mobile call tracker here mobile phone tracking in pakistan cell phone listening software x64 best spyware for galaxy note 3 apps that best cheating spouse business how to remove spyware online cell phone tracker uk here whatsapp spy iphone cydia iphone parental monitoring best spy phone software android press best spy apps for andriod boyfriend spy text messages blackberry spy on your cheating husbands phone call tracker spy is how how spy on phone cell phone listening device iphone iphone spy cam wifi app


This glossary covers words that you will come across on this website.


A unit of stellar distance. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc. (one parsec = 3.2616 light years = 206265 astronomical units = 30.857[*10^12]km)