 We covered Wolf-Riot stars in our 2020 review with our look at WR124. A Wolf-Riot star is a hot O-type star with at least 25 times more mass than our Sun that is nearing the end of its hydrogen-burning phase. Near the end, a Wolf-Riot star generates powerful winds that push huge amounts of gas into space. A new image from Webb reveals a remarkable binary star system with one of them being a Wolf-Riot star known as Wolf-Riot 140. It shows at least 17 concentric dust rings emanating from the pair of stars. Actually, the star system forms shells of dust, not rings, but what we see is the light reflected at the edges from our point of view. Each ring was created when the two stars came closer together and their stellar winds collided, compressing the gas and forming dust. The star's orbits bring them together about once every eight years. We're looking at over a century of dust production from this system. These stars are great sources of galactic dust. The most common element found in stars, hydrogen, can't form dust on its own, Wolf-Riot stars eject more complex elements like carbon. The heavy elements in the wind cool as they travel into space and are then compressed where the winds from both stars collide. We'll cover dust, a critically important component of stars and planet formation, in depth later in this 2020 review when we get to the VV191 galaxy pair.