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spacetelescope.bsky.social@spacetelescope.bsky.social |
New data from Hubble and the retired SOFIA observatory was used to revisit HM Sagittae, one of the strangest binary star systems in our galaxy—40 years after it burst onto the scene as a bright and long-lived nova. (2/5)
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spacetelescope.bsky.social
@spacetelescope.bsky.social
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The latest Hubble ultraviolet observations show that the binary system has gotten hotter. A strong emission line of highly ionized magnesium that was not present in earlier published spectra from 1990 appeared in 2021 data. (3/5)
1 replies 1 reposts 9 likes