Recent content by pdjk

@ finiter: As far as I recall Newtonian theory does not provide any basis for a black hole. The theory of General Relativity does predict black holes and we have since found them both directly and indirectly. Scientific method involves building theories and testing them, either to destruction...

The Ingenuity Mars helicopter is a fantastic achievement and will clearly influence all subsequent Mars exploration. However contrary to the claim made in this article, Ingenuity is not 'the first vehicle ever to explore the skies of a world beyond Earth'. In June 1985 the twin Soviet Vega...