One example: spectroscopic analysis of apparent water plumes from the interior of Europa, one of Jupiter's moons, to determine the chemical composition of a presumed sub-surface ocean that may provide a habitable environment. NASA plans to release additional "first light" images Tuesday, photos designed to showcase Webb's ability to chart the details of stellar evolution, from starbirth to death by supernova, to study how galaxies form, merge and evolve and to probe the chemical composition of atmospheres around planets orbiting other stars.Ĭloser to home, 7% of Webb's observations over its first year of operation will be focused on planets, moons and smaller bodies in our own solar system. And since we know the universe is 13.8 billion years old, we're going back almost to the beginning." They're going back about thirteen-and-a-half billion years. "That light that you are seeing has been traveling for over 13 billion years, and by the way, we're going back farther. "We're looking back more than 13 billion years," he said.
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