![]() The team used the ALMA telescope array to investigate the EGO in high detail. One particular EGO, G19.01–0.03, was observed by Dr. Why are these objects so interesting? EGOs are often associated with young star formation. When they created their images, they found numerous extended green blobs! They assigned colors to each filter, to better highlight which light came from which filter. The color green was assigned to the 4.5 micrometer filter. Historically, the Spitzer Space Telescope, which discovered EGOs, would take images of the sky with three different filters to see how the sky changed depending on which filter was used. What is an Extended Green Object (EGO) and is it aliens? Despite the strange name, EGO’s are not aliens, nor are they green at all! They are clouds of gas that show up when we study the sky at particular wavelengths. ![]() Credit: Steve HeliczerĪstronomy at the University of Hertfordshire
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