Astronauts see sixteen sunrises every 24 hours.
Published Nov 6, 2017
Some astronauts say these wispy, iridescent clouds are the most beautiful phenomena they see from orbit.
Published Aug 20, 2013
An astronaut on the ISS caught a glimpse of a sliver of the setting Moon and some clouds that shine at night.
Published Aug 10, 2003
Noctilucent clouds float high enough in the atmosphere to capture a little bit of stray sunlight even after the Sun has set below them.
Published Dec 2, 2016
PMCs have become brighter and thicker and have appeared farther south in recent years.
Published Sep 15, 2014
High-altitude clouds appeared as far south as the continental United States in early June 2015.
Published Jun 19, 2015
An image from the remote South Sandwich Islands shows how volcanic emissions can create clouds, while the islands themselves deform those clouds.
Published Jun 23, 2012
Polar mesospheric clouds (also known as noctilucent, or “night-shining” clouds) are transient, upper atmospheric phenomena that are usually observed in the summer months at high latitudes (greater than 50 degrees) of both the Northern and Southern Hemispheres. They appear bright and cloudlike while in deep twilight. They are illuminated by sunlight when the lower layers of the atmosphere are in the darkness of Earth’s shadow.
Published Aug 4, 2008
As spring turns to summer in the northern hemisphere, unusual streaks of clouds form high in the atmosphere around sunset.
Published Jun 27, 2019
Normally seen only at twilight, polar mesospheric clouds are illuminated by “sunrise” in this astronaut photo from June 16, 2010.
Published Jul 5, 2010
