Straight Line of the Day: Why Is Neptune Cooling Down?

Neptune Is Cooling Down and Scientists Don’t Know Why
Space.com | Tereza Pultarova

Two decades worth of observations revealed unexpected cooling of the solar system’s most distant planet, Neptune, amid its astronomical summer.

Neptune is orbiting 30 times farther away from the sun than Earth with one year lasting 165 Earth years. The ice giant’s seasons, too, last much longer than those on Earth ― more than 40 Earth-years each.

As the planet moved into its southern summer over the past two decades, astronomers observed its average global temperatures plummet by a staggering 14 degrees Fahrenheit (8 degrees Celsius).

The observed cooling, however, wasn’t uniform, the researchers said in the statement.

Measurements of Neptune’s stratosphere, the second lowest layer of the planet’s atmosphere, revealed a warming trend above Neptune’s south pole. This data set, which only contained data from a two-year period between 2018 and 2020, revealed a speedy warming of about 20 degrees F (11 degrees C). The scientists said that such polar warming has never been observed on Neptune before.

Straight Line of the Day: Why is Neptune cooling down?

 

50 Comments

  1. There is no possible explanation. There is absolutely no margin of error involved in (indirectly) measuring a 14-degree change between moving planets over two decades of varying solar activity at distances ranging between 2.7 to 2.9 billion miles, with our complete knowledge of all possible effects in the intervening space and within our atmosphere and, for that matter, our instruments.

    Plus, we can apparently home in on the second lowest layer of Naptune’s atmosphere over just its south polar region . . . so we’ve got that going for us.

  2. Kirk: “Neptune’s, getting, colder. Theories, gentlemen?”

    McCoy: “I’m a doctor, not . . .”

    Kirk: “Spock?”

    Spock:

    “Change is the essential process of all existence.”

    Let That Be Your Last Battlefield

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