Ice-cold and faraway Neptune, the outermost planet in our solar system, has bolstered its reputation as a mysterious world, with astronomers confusingly confuse about a surprising decline in ambient temperature over the past two decades.
Neptune is one of the least explored of the eight planets in the solar system, as its great distance complicates research into the planet.
With focus on Neptune’s stratosphere – the relatively stable region of the atmosphere above the turbulent weather layer – the researchers had assumed that increasing temperatures from the region that could be seen from Earth would occur across the southern hemisphere from the beginning of the four – decade summer.
Neptune, which like the other planets lacks a rigid surface, has an extremely dynamic atmosphere concentrated in hydrogen and helium, a small amount of methane, on a mantle which consists largely of muddy ammonia and water, as well as a solid cores.
The study was based on more than 95 thermal imaging pictures obtained between 2003 and 2020 with ground spaceflight telescopes in Hawaii and Chile, mainly using the European Southern Observatory’s Very Large Telescope.
Neptune might provide instruction on planets beyond our solar system known as exoplanets, said study coauthor Glenn Orton, a planetary scientist at Caltech’s Jet Propulsion Laboratory.
Neptune has a diameter of approximately 49.250 km, which makes it four times larger than Earth.
“The close relationship that Neptune may share with a large segment of the population of exoplanets,” Orton said,”means that it may be “an exoplanet in our backyard” exoponent in our back yard “- most likely on the coldest end of the spectrum but still a model of what is expected in the meteorology of various exoplanets.”
