The Phoenix dwarf galaxy, discovered in 1976, was originally mistaken for a globular cluster. At a distance of 1.4 million light years from Earth, it is, in fact, a dwarf galaxy, but one that defies easy classification. According to the European Southern Observatory, it does not contain enough mass for build new stars, but a cloud of nearby gas, presumably ejected by supernova explosions, seems to suggest relatively recent star formation and the presence of relatively young suns. The gas does not reside within the galaxy, but it is gravitationally connected, indicating it eventually will fall back into the dwarf. This image was captured by ESO’s Very Large Telescope using the visual and near ultraviolet FOcal Reducer and low dispersion Spectrograph, or FORS2, instrument.
The spectacular aftermath of a 360 million year old cosmic collision is revealed in great detail in new images from ESO’s Very Large Telescope. Among the debris is a rare and mysterious young dwarf galaxy. This galaxy is providing astronomers with an excellent opportunity to learn more about similar galaxies that are expected to be common in the early universe, but are normally too faint and distant to be observed by current telescopes.
This NASA/ESA Hubble Space Telescope image reveals the simple beauty of NGC 339, a 6.5-billion-year-old massive intermediate age star cluster that lies in the SMC, a dwarf galaxy some 200,000 light-years away from us. The relationship between such clusters and true globular clusters is not yet fully understood.