Himiko is a large gas cloud found at redshift of z=6.6 that predates similar Lyman-alpha blobs. At the time of its discovery in 2009, researchers said it "may represent the most massive object ever discovered in the early universe".[1] It is located in Cetus at redshift z=6.595, about 12.9 billion light years from Earth, or about 75×1021 miles (122×1021 kilometers).