Prior to 2040, the last planetary quintuplet occurred in the year 1186, and according to Uptain, records show that the close ...

The line-up of three evening planets in the southwest twilight sky, on Dec. 17 ... when a four-planet parade will be visible before sunrise. 24/7 coverage of breaking news and live events ...

The vernal equinox occurs as Mercury stands still in Pisces and several of Jupiter’s moons transit in the sky this week.

It appears after twilight fades as a cone-shaped glow ... as longer exposures can help to bring it out in a dark sky as well. Sunrise: 6:31 A.M. Sunset: 5:54 P.M. Moonrise: 7:51 A.M. Moonset ...

With the delicate light fading on and off at sunrise and sunset ... to enhance the perception of the morning and evening sky in his Twilight Epiphany Skyscape. Erected in 2012, this installation ...