What is GIS Remote sensing?

To Get Better Understanding About Remote Sensing And How It Relate To Gis You Must Check out These Sites :
http://www.nrcan.gc.ca/earth-sciences/geography-boundary/remote-sensing/fundamentals/1262

http://kb.iu.edu/data/anhs.html

http://www.suparco.gov.pk/pages/rsa-gis.asp

http://www.suparco.gov.pk/pages/rsss.asp

http://landsat.gsfc.nasa.gov/education/tutorials.html