This artist's illustration shows the "hot Jupiter" exoplanet WASP-121b, which presents the best evidence yet of a stratosphere on an exoplanet.
Credit: Engine House VFX, At-Bristol Science Centre, University of Exeter
A huge, superhot alien planet has a stratrosphere, like Earth does, a new study suggests.
"This result is exciting because it shows that a common trait of most of the atmospheres in our solar system — a warm stratosphere — also can be found in exoplanet atmospheres," study co-author Mark Marley, of NASA's Ames Research Center in California's Silicon Valley, said in a statement.
"We can now compare processes in exoplanet atmospheres with the same processes that happen under different sets of conditions in our own solar system," Marley added. [Gallery: The Strangest Alien Planets]