Assertion: telescope's observation | /r/HasProperty | performed in x-rays
Facets:
value: including a hubble space telescope study
type: OTHER
Source sentences:
text: Follow-up observations have been performed in X-rays and radio wavelengths, including a Hubble Space Telescope study released in 2015 that clocked these bubbles moving at 2 million mph (3.2 million km/h).