shemp
a flimsy character...perfidious and despised
Evidence of controversial Planet 9 uncovered in sky surveys taken 23 years apart
If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.
The best candidate yet for the elusive Planet Nine has been spotted in two deep infrared surveys taken 23 years apart. If this mystery object really is Planet Nine, it would have a mass greater than Neptune, and currently be about 700 times farther from the sun than Earth is.
The possibility of additional planets in our solar system has been proposed many times, going under names such as "Planet X," because experts thought the concept of an extra planet in our vicinity of the cosmos could explain a perceived regularity in mass extinctions on Earth. Perhaps, they said, the periodic influx of comets that impact Earth are pushed our way by an unseen planet. However, the supposed periodicity in mass extinctions has not held up to scrutiny, and so the need for that particular Planet X has gone away. This brings us to Planet Nine.
Planet Nine is unrelated to the Planet X concept, and rather put forward in 2016 by Michael Brown and Konstantin Batygin of the California Institute of Technology to explain an unusual bunching of orbits of some objects in the Kuiper Belt, such as Sedna. This proposed Planet Nine would be more massive than Earth, and orbit on a highly eccentric path that takes it hundreds of astronomical units from the sun (one astronomical unit is the distance between Earth and the sun). That far away, it would be extremely difficult to detect.
Now, a team led by astronomer Terry Long Phan of the National Tsing Hua University in Taiwan has delved into the archives of two far-infrared all-sky surveys in search of Planet Nine — and incredibly, they have found something that could possibly be Planet Nine.
The Infrared Astronomy Satellite, IRAS, launched in 1983 and surveyed the universe for almost a year before being decommissioned. Then, in 2006, the Japanese Aerospace Exploration Agency (JAXA) launched AKARI, another infrared astronomy satellite that was active between 2006 and 2011.
TL/DR: A team claims to have found evidence of Planet 9 by comparing two far-infrared surveys 23 years apart. They claim it is a Neptune-sized body about 700 AU from the Sun.
We'll see. Not jumping on the bandwagon yet.