Recently, an isolated dwarf galaxy was discovered in an image from the Hubble Space Telescope. The galaxy is classified as a dwarf irregular galaxy because it is relatively small and lacks clear structure.
For more information and to see the image, visit: https://www.nasa.gov/mission_pages/hubble/science/ddo190.html.
This discovery serves as a new extension to the NASA Now Classroom Videos program Engineering Design Process: Hubble Space Telescope, which can be found on the NASA Explorer Schools Virtual Campus.