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Credit: NASA

TESS & AI: Accelerating Exoplanet Discovery

Mission TESS: The Alliance of Space and Artificial Intelligence Accelerates Exoplanet Discovery

Massive data processing represents one of the greatest challenges in modern astronomy. Space telescopes accumulate millions of images of the cosmos, and the integration of artificial intelligence now stands as an indispensable tool to sort and analyze these observations in record time. The TESS (Transiting Exoplanet Survey Satellite) mission serves as a concrete illustration, as it combines advanced space engineering with machine learning algorithms.

Main Characteristics of TESS

TESS is a NASA satellite designed by the company Orbital ATK and launched on April 18, 2018, by a SpaceX Falcon 9 rocket. It is a compact 365 kg spacecraft that operates via solar panels. To achieve its discoveries, it utilizes a highly specific and stable orbit around Earth and carries a single instrument: four powerful cameras. This equipment allows it to photograph vast areas of space simultaneously to monitor starlight.

TESS: Mission Objectives

The primary objective of the TESS mission is to map the entire sky to locate exoplanets in orbit around the brightest and closest stars to our solar system. An exoplanet simply refers to a planet that sits outside our solar system and revolves around a sun other than our own.

To achieve this, the satellite employs the transit method, which detects the drop in a star’s brightness when a planet passes in front of it. The mission focuses specifically on rocky worlds of Earth-like size or “Super-Earths” that reside within the habitable zone of their star. Finally, this continuous monitoring also permits the observation of other variable cosmic phenomena, such as supernovae or stellar flares.

 

Artist's Impression of a close orbiting multi-planet system - Keplar-11. Credit NASA / Tim Pyle

Artist’s Impression of a close orbiting multi-planet system – Keplar-11.
Credit NASA / Tim Pyle

3D PLUS Technologies on Board TESS

For this mission, we provided miniaturized electronic modules. Here is the purpose of each onboard component:

  • MRAM & DDR2: These memories store the images and data from the four cameras. The DDR2 ensures high processing speed, while the MRAM permanently saves critical data and resists radiation.
  • LVDS (Drivers & Receivers): These components (space-qualified single, dual, and quad versions) transfer high-speed data streams between the satellite’s systems with minimal power consumption.
  • Termination Regulator: This regulator stabilizes electrical signals. It eliminates noise and interference to guarantee smooth, error-free data transmission.

TESS and AI: A New Era for Exoplanet Discovery

Thanks to the RAVEN artificial intelligence, created by astronomers at the University of Warwick, science resolves its greatest current problem: it analyzes immense quantities of data in record time. Following the analysis of more than 2 million stars, this tool validates 118 new exoplanets with certainty and identifies more than 2,000 serious candidates, of which a thousand were completely unknown.

Its strength lies in its capacity to eliminate false alerts instantly, such as the interference that binary stars cause. To accomplish this, researchers trained machine learning models on ultra-realistic simulations. Beyond these discoveries, AI enables a rigorous scientific study of the demographics of these new worlds. The results reveal that 9 to 10% of stars similar to our Sun possess a short-orbit planet. Furthermore, the tool measures with unprecedented precision the extreme rarity of planets within the “Neptunian desert,” which exist around only 0.08% of these stars. Thanks to this alliance between detection and reliable statistical validation, this technology offers an ideal database to target future space observations.

Artist’s impression of an ultra-short-period planet. Credit NASA, ESA, and A. Schaller (for STScI)

Artist’s impression of an ultra-short-period planet.
Credit NASA, ESA, and A. Schaller (for STScI)