Most Compact Quadruple Star System Found
Astronomers have discovered TIC 120362137, the most compact 3+1-type quadruple star system ever identified. The finding provides a rare window into the complex gravitational dynamics and evolutionary processes that occur in multi-star environments.
The three inner stars of TIC 120362137 are all more massive and hotter than our sun, packed into a space smaller than Mercury's orbit. The fourth, more sun-like star, orbits this trio in a mere 1,046 days. This entire system is so compact it could fit within the space between our sun and Jupiter. This discovery was made possible by NASA's Transiting Exoplanet Survey Satellite (TESS), a mission with a relatively low cost of $200 million, a fraction of the $640 million for its predecessor, the Kepler telescope. TESS is designed to survey the brightest stars near Earth and has identified over 7,821 candidate exoplanets as of January 2026. The TESS mission itself is a product of public-private collaboration, initially receiving financial backing from Google and the Kavli Foundation before becoming a formal NASA program. The satellite was launched by SpaceX, and its spacecraft bus was manufactured by Orbital ATK, showcasing the growing synergy between government agencies and commercial aerospace companies. Investment in space exploration often yields significant economic returns. A 2020 NASA report found that the agency generated over $64.3 billion in economic output in a single fiscal year, supporting more than 312,000 jobs nationwide. The technologies developed for these missions frequently find applications in various commercial sectors. Technological "spinoffs" from space and astronomical research are widespread. For example, the CMOS image sensors in many smartphones were developed for miniature cameras on interplanetary missions. Similarly, advancements in medical imaging, scratch-resistant lenses, and even invisible braces have their roots in aerospace technology. For professionals in Santa Ana, the aerospace industry is a major driver of the Southern California economy. In 2014, the industry supported over 85,000 jobs in the region, with average salaries nearly double that of other sectors. Los Angeles County's aerospace and defense sectors added 11,000 jobs between 2022 and 2024, with an average wage of $141,110. The continued exploration of space, driven by both scientific curiosity and commercial interests, fuels a cycle of innovation. Discoveries like TIC 120362137 not only expand our understanding of the universe but also contribute to a high-tech economy, creating new business opportunities and career paths in regions with a strong aerospace presence.
