Home » NASA announced the discovery of 301 new exoplanets | Machine Learning | Supercomputer

NASA announced the discovery of 301 new exoplanets | Machine Learning | Supercomputer

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[Epoch Times November 27, 2021](Epoch Times reporter Di Rui compiled a report) NASA issued an announcement on November 22 that 301 new exoplanets have been discovered, which is a series of discoveries in history. The largest number of outer planets.

NASA said that the reason why so many exoplanets can be discovered at once is because they use a machine learning system based on neural networks. The project leader said that this system is more accurate than other existing computer programs and experts. Prior to this, 4,569 exoplanets had been confirmed.

The process of determining exoplanets is to find signal clues that may be planets in the large amount of data sent back by the Kepler space telescope, and then hand them to researchers for confirmation one by one. Many of the suspected signals found in previous work did not really come from exoplanets after tracking.

In addition, the amount of data is now quite large, and there are thousands of star systems in the telescope’s field of view at any point in time. So confirming whether these systems contain exoplanets is a very time-consuming process.

Now, NASA uses the supercomputer “Pleiades” (Pleiades), coupled with the new machine learning system ExoMiner, greatly reducing the time required to identify each exoplanet.

Hamed Valizadegan, the leader of the ExoMiner project, said in a press release: “Which celestial body ExoMiner thinks is a planet, you can believe that it is indeed a planet.”

The Astrophysical Journal accepted the paper on November 22 and is preparing to arrange for publication.

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This machine learning system brings together a variety of methods used by modern scientists to find planets. The most commonly used method is the transit method, which captures the periodic changes in the brightness of a star and analyzes whether it is caused by the surrounding planets passing in front of it.

Other methods include the radial velocity measurement method, which measures whether the trajectory of a star is deviated. This is likely to be the result of the gravitational force of the surrounding planets and it. There is also the microlens method, which determines whether the starlight reaching the earth has bypassed a certain planet located between it and the earth, causing distortion of the star’s image. Finally, there is the direct imaging method, that is, directly taking pictures of exoplanets. Among the exoplanets that have been discovered, the proportion of exoplanets discovered by direct imaging is only a little more than 1%.

NASA said that none of the more than 300 newly discovered exoplanets is a rocky planet like the Earth. Of all the exoplanets discovered so far, most of them are gaseous planets about the size of Neptune. There are very few rocky planets like the Earth. ◇

Editor in charge: Ye Ziwei

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