Scientists Discover 10,000 New Planets in NASA Data

The universe just got a whole lot bigger. Scientists announced they've found approximately 10,000 new exoplanet candidates hiding in plain sight within NASA's telescope data.

A research team led by Princeton University graduate student Joshua Roth published their findings this month in the Astrophysical Journal. They analyzed data from NASA's Transiting Exoplanet Survey Satellite, known as TESS, which has been scanning the skies since 2018.

The breakthrough came from looking where others hadn't thought to search. While most astronomers focus on bright stars where signals are easiest to spot, Roth's team turned their attention to much fainter stars.

Using machine learning, the researchers sifted through a staggering 83 million light curve datasets. These light curves track the brightness of stars over time, and when a planet passes in front of its star, it causes a tiny dip in brightness.

The team built two separate models, one for bright stars and another specifically designed for faint ones. After filtering out noise and false positives from an initial 50,000 potential signals, they identified 11,554 planet candidates.

Around 10,000 of these worlds are completely new discoveries. Another 411 are "single-transit events," meaning they were only seen once crossing their star, suggesting planets with very long orbits that take years or even decades to complete.

The team has already confirmed one of their discoveries: TIC 183374187, a planet about half the size of Jupiter that zips around its star every five days. Follow-up observations are underway for thousands more candidates.

Most of the newly discovered planets are gas giants, making up 97.7% of the finds. That's because bigger planets are simply easier to spot, and planets with shorter orbits create more frequent dips in starlight.

The Ripple Effect

This discovery could more than double the number of planet candidates found in TESS data. In its first two years, TESS was expected to discover 1,250 potential planets. By expanding the search to include fainter stars, scientists have opened up an entirely new frontier.

The method has limitations. Planets orbiting dim stars are harder to study with follow-up instruments, and some candidates will turn out to be false positives. But the sheer number of new worlds suggests our galaxy is even more crowded with planets than we imagined.

By teaching computers to look where human eyes might miss the signals, researchers are proving that treasure troves of discovery might be hiding in data we've already collected.

The search for worlds beyond our own just took a giant leap forward, reminding us that the universe still holds countless surprises waiting to be found.