Complex sentence: Wide-field Infrared Survey Explorer (WISE) is a NASA infrared-wavelength astronomical space telescope launched on December 14,2009, and placed in hibernation on February 17,2011 when its transmitter was turned off.
Split into simpler sentences: Wide-field Infrared Survey Explorer (WISE) is a NASA infrared-wavelength astronomical space telescope active from December 2009 to February 2011. It was launched on December 14,2009, and placed in hibernation on February 17,2011 when its transmitter was turned off.