"Current" science is a bit of a stretch, like a couple thousand years of stretching. Eratosthenes showed the earth was round and calculated its circumference to an astonishing precision using research and fairly simple trigonometry. He died 2,219 years ago.
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By ignoring the second half of their comment you've missed the subtly that "panel" is an overly broad term and there are several different kinds of panels that collect energy from the sun for human use, among them photovoltaics, panels for heating residential water (often seen as black roof panels with pipes), and complex mirror (aka reflective panels) arrangements for melting salts. All of them use panels in some form.