For North American time zones, the 2014 autumnal equinox will come on Monday, September 22 at 10:29 p.m. EDT, 9:29 p.m. CDT, 8:29 p.m. MDT or 7:29 p.m. PDT. This equinox falls on Tuesday, September 23 at 2:29 UTC.
Twice a year – on the March and September equinoxes – everyone worldwide supposedly receives 12 hours of day and 12 hours of night. Yet, in actuality, there is more daylight than nighttime on the day of the equinox. Why?
Blue hour by Marianna Bucina Roca in Gloucester, Massachusetts.
When you see a strong blue tone to photographs, it could be that the photographer has taken advantage of the blue hour. That’s a time of day when the sun has just set or is about to rise, when the sky overhead takes on a deep blue color, and when the landscape is suffused with bluish light. The blue hour is a good time to take photos of the moon, because then the moon’s glare isn’t so bright in contrast to the sky. It’s also a good time to take landscape photos, as the photos in this post show.
The Orion Nebula, 1,500 light years from Earth. Image credit: NASA/JPL-Caltech/STScI
Here’s your FAQ for this Friday ….
Light is the fastest-moving stuff in the universe. It travels at an incredible 300,000 kilometers (186,000 miles) per second. That’s very fast. A light-year is the distance light travels in one year. How far is that?