This is Barnard's star, a red dwarf 6 light years away. The planets are a little larger than Mars based on mass, very close in, with orbital periods of a few days, too hot for liquid water.
<a href="https://news.uchicago.edu/story/study-uchicago-scientists-finds-four-tiny-planets-around-one-our-nearest-stars" rel="nofollow">https://news.uchicago.edu/story/study-uchicago-scientists-fi...</a><p>The actual paper: <a href="https://iopscience.iop.org/article/10.3847/2041-8213/adb8d5" rel="nofollow">https://iopscience.iop.org/article/10.3847/2041-8213/adb8d5</a><p>Barnard's star: <a href="https://en.wikipedia.org/wiki/Barnard's_Star" rel="nofollow">https://en.wikipedia.org/wiki/Barnard's_Star</a>