September 4th, 2015
Waning Gibbous Moon

Night Sky Calendar

  Date Title Description
Autumnal (September) Equinox

The autumnal equinox occurs when the Sun crosses the celestial equator from the northern half of the sky to the southern half of the sky. Consequently, daytime and nighttime are both about 12 hours long. The Sun rises due east and sets due west on the equinox date.

In the southern hemisphere seasons are reversed. So, the September equinox marks the beginning of spring.

Total Lunar Eclipse Visible from Utah

The second of two lunar eclipses visible from Utah in 2015 is a total eclipse occurring the evening of September 28th. Note: The Moon will already be will into eclipse at moon rise.

Partial phase begins at 7:07 pm, MDT.
Total phase begins at 8:11 pm, MDT.
Greatest eclipse occurs at 8:48 pm, MDT.
Totality ends at 9:23 pm, MDT.
Partial phase ends at 10:27 pm, MDT.

Daylight Saving Time Ends

November 1st, 2015.
Set clocks back one hour at 2 am.

Winter (December) Solstice

This event occurs on the 21st, Mountain Standard Time. Calendars will show this event on the 22nd due to time zone differences.

The winter solstice for the northern hemisphere occurs when the Sun is at its lowest point in the sky around noon. It is about 23.5 degrees south of the celestial equator. The Sun rises its farthest south of east and sets its farthest south of west. Daytime is near its shortest and nighttime near its longest.

In the southern hemisphere, seasons are reversed. so, the December solstice marks the beginning of summer, and the Sun is at its highest point in the sky around noon.