Astronomers say they may have found it.
More than 5,000 planets exist beyond our solar system, according to NASA, and this week astronomers announced they may have discovered the youngest one yet.
Scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile report in the journal The Astrophysical Journal Letters the first-ever detection of gas in a circumplanetary disk, collections of dust and debris found around young planets.
The finding, according to the National Radio Astronomy Observatory, which partners with the ALMA site, suggests the presence of a very young exoplanet – the term for a planet found outside our solar system.
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While studying AS 209 – a young star 395 light-years from Earth in the constellation Ophiuchus, which graces skies in the summer – astronomers observed "a blob of emitted light in the middle of an otherwise empty gap in the gas surrounding the star," according to an NRAO news article on the findings Tuesday.
That led to the detection of the circumplanetary disk surrounding a potential Jupiter-mass planet, the radio astronomy observatory's article said.