The next full moon will be a partial lunar eclipse, a supermoon, a Corn Moon, and a Harvest Moon.

On Saturday morning, October 12, at 11:10 a.m., Comet C/2023 A3 (Tsuchinshan-ATLAS) will be at its closest to Earth. If it survives its passage by the Sun, it will likely be at its brightest then. Although it will be on the horizon as evening twilight ends Friday, our first chance to see it above the horizon as it emerges from the glow of twilight will likely come Saturday evening, when the comet will be 4 degrees above the western horizon as evening twilight ends (at 7:31 p.m. EST), at a similar altitude and to the right of Venus. Over the next few nights, the comet will likely fade as it moves away from Earth, but it will also appear higher in the sky and set later each evening, giving us more time and darker skies to look for this comet. When evening twilight ends on October 13, it will be 10 degrees above the western horizon, 12 degrees on October 14, 16 degrees on October 15, etc. Current light curves predict it will fade rapidly and reach magnitude below 6 by the end of October. The comet’s brightness and how quickly it actually fades depend on the gas and dust it emits, which can change rapidly and unpredictably, but it could be a good show on the evenings after October 12.