The Spitzer Space Telescope website will be down on Tuesday July 29th from 9am PDT to 10am PDT for server maintenance. Thank you for your patience.

Fast Facts

The Spitzer Space Telescope is a space-borne, cryogenically-cooled infrared observatory capable of studying objects ranging from our Solar System to the distant reaches of the Universe. Spitzer is the final element in NASA's Great Observatories Program, and an important scientific and technical cornerstone of the Astronomical Search for Origins Program.

Launch Date:25 August 2003
Launch Vehicle/Site:Delta 7920H ELV / Cape Canaveral, Florida
Estimated Lifetime:2.5 years (minimum); 5+ years (goal)
Orbit:Earth-trailing, Heliocentric
Wavelength Coverage:3 - 180 microns
Telescope:85 cm diameter (33.5 Inches), f/12 lightweight Beryllium, cooled to less 5.5 K
Diffraction Limit:6.5 microns
Science Capabilities:Imaging / Photometry, 3-180 microns
Spectroscopy, 5-40 microns
Spectrophotometry, 50-100 microns
Planetary Tracking:1 arcsec / sec
Cryogen / Volume:Liquid Helium / 360 liters (95 Gallons)
Launch Mass:950 kg (2094 lb) [Observatory: 851.5 kg, Cover: 6.0 kg, Helium: 50.4 kg, Nitrogen Propellant: 15.6 kg]

Acronyms List (pdf)

Fact Sheet (pdf)