Antlia 2 - Noaoann18022a
Astronomers have discovered a large, extremely diffuse galaxy companion to the Milky Way. As big as the Large Magellanic Cloud but 10,000 times fainter, the galaxy has eluded us until now because of its faint, “ghostly” appearance and its hiding place behind the disk of the Milky Way. The discovery was made with the Gaia satellite and archival data from DECam on the CTIO Blanco telescope. Astronomers want to know: is this galaxy an oddball?...or one of many “ghostly” companions yet to be found?
Credit:
G. Torrealba/Academia Sinica, Taiwan; V. Belokurov/Cambridge, UK & CCA, New York, US; based on an image by S. Brunie/ESOThis media was created by the National Optical-Infrared Astronomy Research Laboratory (NOIRLab).
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Antlia 2Antlia 2 ist eine gravitativ an die Milchstraße gebundene Zwerggalaxie im Sternbild Luftpumpe. Ihre Ausdehnung am Himmel erstreckt sich über 1,27°. Bei einer Entfernung von etwa 430.000 Lichtjahren beträgt ihr Durchmesser somit fast 10.000 Lichtjahre. .. weiterlesen