"The issues of climate change are very complicated,” said Philip Goode, PhD, to an audience of more than 200 faculty, staff, students and guests on April 6, 2005 in the NJIT Campus Center. Goode, a distinguished professor of physics at NJIT and director of the Big Bear Solar Observatory in California, shared highlights from his research on the correlation between climate changes on earth and changes in the sun’s output, earth’s reflectivity and greenhouse gases. "The models are impressive, but appreciable climate factors are not accounted for in models, so their predictions of the future are not precise,” he said. “We cannot postdict the past.”