Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have detected two rocky alien worlds orbiting a nearby M dwarf star known as HD 260655. The newly found exoplanets are larger and at least two times more massive than the Earth. The finding is reported in a paper published April 21 on arXiv.org.
TESS is conducting a survey of about 200,000 of the brightest stars near the sun with the aim of searching for transiting exoplanets. So far, it has identified over 5,600 candidate exoplanets , of which 205 have been confirmed so far.planets
"This work presents the discovery and characterization of a multiplanetary system orbiting the nearby M dwarf HD 260655. Transit observations from TESS detected two small planet candidates that were confirmed with independent RV data from the HIRES and CARMENES instruments taken since 1998 and 2016, respectively," the researchers wrote in the paper.received designation HD 260655 b. It has a radius of about 1.24 Earth radii and is some 2.
Based on the derived densities of the two new alien worlds, the astronomers concluded that they both have rocky composition. However, they noted that while HD 260655 b has a density in perfect agreement with the Earth's, the density of HD 260655 c suggests an internal composition void of iron and fully made of silicates.
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