(WHTM) — You may have looked up into the sky during a clear, blue day and noticed long, thin clouds stretching for miles. You also may have seen airplanes flying with two thin cloud trails behind them ...

Using the NASA Rossi X-ray Timing Explorer (RXTE) satellite, a team of astronomers have discovered an object predicted, but never seen before – a ‘jet trail’ nebula. The nebula represents a completely ...

Last weekend, when the weather was clear and near 90 degrees and so many of us were outside trying to soak up as much sunshine as we could, a lot of people noticed that jet trails (contrails) were ...