Galaxy Mergers. Active Galactic Nucleus. Galactic Center. Galaxy Formation and Evolution. Planet Hunters. Galaxy Zoo Mergers. S Hubble Observes Young Dwarf Galaxies Bursting With Stars. NASA's Hubble Observes Young Dwarf Galaxies Bursting With Stars This image reveals 18 tiny galaxies uncovered by NASA's Hubble Space Telescope. The puny galaxies, shown in the postage stamp-sized images, existed 9 billion years ago and are brimming with star birth. Hubble's Wide Field Camera 3 and Advanced Camera for Surveys spied the galaxies in a field called the Great Observatories Origins Deep Survey (GOODS).
The galaxies are among 69 dwarf galaxies found in the GOODS (marked by green circles in the large image) and other fields. Images of the individual galaxies were taken November 2010 to January 2011. The large image was taken between Sept. 2002 and Dec. 2004, and between Sept. 2009 and Oct. 2009. (Credit: NASA, ESA, A. van der Wel (Max Planck Institute for Astronomy, Heidelberg, Germany), H. › View larger image The resulting observations are somewhat at odds with recent detailed studies of the dwarf galaxies that are orbiting as satellites of the Milky Way. Related Link: Galaxy Zoo: Hubble. Galaxy. Galaxies contain varying numbers of planets, star systems, star clusters and types of interstellar clouds. In between these objects is a sparse interstellar medium of gas, dust, and cosmic rays.
Supermassive black holes reside at the center of most galaxies. They are thought to be the primary driver of active galactic nuclei found at the core of some galaxies. The Milky Way galaxy is known to harbor at least one such object.[5] Galaxies have been historically categorized according to their apparent shape, usually referred to as their visual morphology. A common form is the elliptical galaxy,[6] which has an ellipse-shaped light profile. Etymology[edit] The word galaxy derives from the Greek term for our own galaxy, galaxias (γαλαξίας, "milky one"), or kyklos ("circle") galaktikos ("milky")[11] for its appearance as a lighter colored band in the sky. "See yonder, lo, the Galaxyë Which men clepeth the Milky Wey, For hit is whyt. " Nomenclature[edit] Observation history[edit] Milky Way[edit]