While measuring the physical characteristics of K2-18b, a neighbouring planet was discovered in the process

While measuring the physical characteristics of K2-18b, a neighbouring planet was discovered in the process
Four exoplanets have been discovered orbiting Sun-like star tau Ceti, two of them are super-Earths residing in the Goldilocks zone
From an area free of light pollution, the Sculptor Dwarf Galaxy has been imaged in exquisite detail by the European Southern Observatory
It’s a way of finding distant worlds, so how does it work?