- Hanny's VoorwerpA voorwerpje in the Leo Minor constellation near the galaxy IC 2497. The first such object discovered, an intergalactic gas cloud lit up by an extinguished quasar. The quasar jet has burned a hole in the intergalatic cloud, and some collapse, causing star formation, making this voorwerpje a candidate as a galaxy or star cluster.
- voorwerpAn ionization or light echo, especially the quasar ionization echo known as Hanny's Voorwerp.
- voorwerpjeSynonym of voorwerp