If a star is dim, its spectrum is also dim and the spectral lines aren't well-defined. Now, with the launching of the NASA planet-hunting telescope, known as Tess, there will be detailed and completed images of different kinds of planets in the galaxy. The telescope will look at about 85% of the sky including the brightest stars and will find exactly what's happening on the planet's surface, with the possibility of assessing how habitable the planet may be. In short, Tess will be able to reveal to scientists the size, orbit, composition, as well as the processes that are occurring inside and on these unknown planets. Tess is expected to find tens of thousands of new worlds including at least a few dozens around the size of Earth.