Hot Jupiter-like exoplanet expels a spiral cloud of helium :

An exoplanet has been spotted releasing huge amounts of helium gas, leaving a spectacular trail in its wake 950 light-years from Earth.

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Texas , United States , Zhoujian Zhang , University Of Texas Mcdonald Observatory , University Of California Santa Cruz , Department Of Astronomy Astrophysics , California Santa , Hobby Eberly Telescope ,