No we do not.
Yes, we do in fact create fusion reactions here on Earth! Fusion occurs here on Earth. I therefore have no problem pointing at objects in the sky and theorizing that fusion happens there too.
Fusion power - Wikipedia, the free encyclopedia
As of July 2010, the largest experiment by means of magnetic confinement has been the Joint European Torus (JET). In 1997, JET produced a peak of 16.1 megawatts (21,600 hp) of fusion power (65% of input power), with fusion power of over 10 MW (13,000 hp) sustained for over 0.5 sec. Its successor, ITER, was officially announced as part of a seven-country consortium.[1] ITER is designed to produce ten times more fusion power than the power put into the plasma. ITER is currently under construction in Cadarache, France.
I don't care if fusion occurs EXACTLY the same way everywhere. All I care about is the fact that fusion has been shown to be a possible source of energy and fusion reactions occur here on Earth. I therefore have no problem at all with someone theorizing fusion as an energy source somewhere else in the universe. That also holds true for fission, chemical reactions, etc.
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