Water vapor has been detected in the atmosphere of a Neptune-size exoplanet about 150 light-years from Earth, scientists say.
Scientists said the findings demonstrate how studying the chemical makeup of exoplanet atmospheres can help astronomers learn how the planets came to be.Jan. 13, 2022, 3:11 PM UTCWater vapor has been detected in the atmosphere of a Neptune-size exoplanet about 150 light-years from Earth, according to research presented Thursday by astronomers at the University of Kansas.
"This planet is a little bigger than our Neptune, but it's very, very different," said Jonathan Brande, a doctoral student in physics and astronomy at the University of Kansas, who led the research."So the question is: How did this planet form and get to where it is now, and how did our Neptune form and get to where it is?"
The exoplanet, known as TOI-674 b, is about 1.3 times the size of Neptune in our solar system, but it is in a much tighter orbit, taking just under two days to circle its host star, compared to the roughly 165 years it takes for Neptune to journey around the sun. It's not the first time water vapor has been discovered in the atmosphere of an exoplanet. In 2019, the Hubble Space Telescope
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