Before we resume our normally scheduled program, let’s pause for a bittersweet farewell to the Spitzer Infrared Space telescope, one of the most remarkable scientific tools ever put into operation.  In 2003 the telescope was launched from Cape Canaveral aboard a Delta II rocket.  It was sent into a heliocentric orbit rather than a geocentric orbit–following Earth rather than orbiting around it in order to minimize heat interference from our home planet.  When the telescope ran out of liquid helium coolant in 2009 most of its instruments and modules became unusable (since the main mirrors required a frosty -459 degrees Fahrenheit temperature to operate).  However, some of its most important discoveries came during the “warm phase” of operation between 2009 and January 30, 2020 (when mission scientists turned off the telescope).  For example it found and observed the seven world Trappist1 system which Ferrebeekeeper was so very enamored of back in 2017.


Spitzer has provided enormous treasure troves of data concerning the formation of planets and galaxies (particularly back during the peak star-formation era ten billion years ago).  It has also afforded humankind an in-depth look at non-luminous objects like comets, asteroids, and vast clouds of dust and gas between the stars.


Although astronomers are sad to see the mission end, they are excited by the prospects of Spitzer’s replacement.  Spitzer had a main mirror which was a bit smaller than a meter (33 inches).  The upcoming Webb telescope will have a 6.5 meter (21-foot) mirror (if we ever manage to launch it).  Goodbye to the little telescope that could…but prepare for great things in the near future!