Steamy World Could Be a Sample of Water-Rich Planets Throughout Our Galaxy
The search for life in space goes hand-in-hand with the search for water on planets around other stars. Water is one of the most common molecules in the universe, and all life on Earth requires it. Water functions as a solvent by dissolving substances and enabling key chemical reactions in animal, plant, and microbial cells. It is much better at this than other liquids.
Astronomers are intrigued when finding evidence of water vapor on exoplanets. A recent target is the planet GJ 9827d, which may have a water-rich atmosphere around it. No bigger than twice Earth’s diameter, the planet could be an example of potential water-rich worlds elsewhere in our galaxy. But don’t plan on buying real estate on GJ 9827d. The planet is as hot as
Hubble Space Telescope Finds Water Vapor in Small Exoplanet’s Atmosphere
Astronomers using NASA’s Hubble Space Telescope observed the smallest exoplanet where water vapor has been detected in the atmosphere. At only approximately twice Earth’s diameter, the planet GJ 9827d could be an example of potential planets with water-rich atmospheres elsewhere in our galaxy.
“This would be the first time that we can directly show through an atmospheric detection, that these planets with water-rich atmospheres can actually exist around other stars,” said team member Björn Benneke of the Trottier Institute for Research on Exoplanets at Université de Montréal. “This is an important step toward determining the prevalence and diversity of atmospheres on rocky planets.”
“Water on a planet this small is a landmark discovery,” added co-principal investigator Laura Kreidberg of Max Planck Institute for Astronomy in Heidelberg, Germany. “It pushes closer…
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