The coldest and farthest Neptune, our most distant planetary planet, adds to its popularity as a mysterious planet, with astronomers puzzled by the dramatic drop in atmospheric temperature over the past two decades. in addition to the turbulent climate – researchers were expecting to find rising temperatures in the visible part of the planet Earth when its summer began at the southern hemisphere, a season that lasts for forty years. Instead, they found their temperatures to plummet.
Research shows
The study was based on more than 95 thermal-infrared images – all of which were taken – from 2003 to 2020 using ground-based telescopes in Hawaii and Chile, in particular the European Southern Observatory’s Very Large Telescope. The most complete test to date is Neptune’s atmospheric temperature. “The universe seems so much more complex than we ever thought it would be, which, surprisingly, seems to be a natural ecological lesson that scientists repeatedly teach,” says Michael Roman, a post-doctor doctor. A researcher at the University of Leicester in England and lead author of the study published Monday in the Planetary Science Journal.
Neptune’s stratosphere temperature dropped to 14 degrees Fahrenheit (8 degrees Celsius) to 179 F (minus 117 C) within 17 years of study. In contrast, temperatures in Neptune’s troposphere – the cooler climate – did not show significant fluctuations in temperature as minus 370 F (minus 223 C).Neptune is one of eight planets in the solar system that have been tested to a lesser extent, making it difficult to study on earth. NASA’s Voyager 2 is the only spacecraft ever to visit nearby, flying over Neptune in 1989. “I think Neptune is very interesting to most of us because we still know very little about it,” Roman said.
Its temperature changes were distributed unevenly, by region variation. The tropics in the south are cool, then warm, and cool again. Mid-latitudes temperatures initially remained unchanged before gradually declining. Temperatures at the South Pole began to drop slightly before the warmth between 2018 and 2020.”I suspect that global warming may be due to changes in atmospheric chemistry, which respond to changing seasonal light and, in turn, change the way the atmosphere cools successfully,” Roman said.
Neptune dynamic atmosphere
Neptune’s orbit is about 30,600 miles (49,250 km), making it four times the size of Earth. It orbits more than 30 times as far away from the sun as the Earth at a distance of 2.8 billion kilometers (4.5 km), it takes 165 years for the Earth to complete one solar cycle – the Neptunian year. its oval shape sometimes draws it closer to the sun than Neptune.
Neptune and neighboring Uranus are classified as ice giants, in contrast to the giant Jupiter and Saturn galaxies. Neptune, like other planets with no solid surface, is highly volatile, especially hydrogen and helium, with a small amount of methane, over a thick layer of slushy ammonia and water and a solid core. “The close relationship Neptune can share with the vast majority of exoplanet people,” Orton said, “means it may be ‘exoplanet in our yard’ – perhaps the coldest end of the spectrum, but it is still a model of what we can expect to see in meteorology various exoplanet. “
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