<p>At NASA's James Webb Space Telescope's final destination in space, one million miles away from Earth, it will operate at incredibly cold temperatures of -387 degrees Fahrenheit, or 40 degrees Kelvin. This is 260 degrees Fahrenheit colder than any place on the Earth’s surface has ever been.
</p><p>So first, this final super cold test at Goddard will prepare the Integrated Science Instrument Module (ISIM), or the “heart” of the telescope, for space.
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</p><p>Credit: NASA/Goddard/Chris Gunn
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<bdi><a href="https://www.wikidata.org/wiki/Q110278636" class="extiw" title="d:Q110278636"><span title="American photographer">Chris Gunn</span></a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/gsfc/22535796312/">NASA's James Webb Space Telescope Science Instruments Begin Final Super Cold Test at Goddard</a>