Among the many discoveries by NASA’s Mars Reconnaissance Orbiter since the mission was launched on Aug. 12, 2005, are seasonal flows on some steep slopes. via NASA http://ift.tt/1WiS1uZ

NASA astronaut Scott Kelly took this photograph of a sunrise over the western United States and posted it to social media on Aug. 10, 2015. Kelly wrote, “#GoodMorning to those in the western #USA. Looks like there’s a lot going on down there. #YearInSpace” via NASA http://ift.tt/1ICJwE0

Saturn’s unusual appearance in this picture is a result of the planet being imaged via an infrared filter. via NASA http://ift.tt/1HBGnQN

This colorful bubble is a planetary nebula called NGC 6818, also known as the Little Gem Nebula. The rich glow of the cloud is just over half a light-year across — humongous compared to its tiny central star — but still a little gem on a cosmic scale. via NASA http://ift.tt/1K7fc2m

This new NASA/ESA Hubble Space Telescope image shows the center of the Lagoon Nebula, an object with a deceptively tranquil name, in the constellation of Sagittarius. The region is filled with intense winds from hot stars, churning funnels of gas, and energetic star formation, all embedded within an intricate haze of gas and pitch-dark dust. via NASA http://ift.tt/1gdKYmi

Astronauts on the International Space Station continue testing the VEGGIE hardware for growing vegetables and plants in space. VEGGIE provides lighting and nutrient supply for plants in the form of a low-cost growth chamber and planting “pillows” — helping provide nutrients for the root system. via NASA http://ift.tt/1E8ffZG

On July 28, 2015, the Operational Land Imager (OLI) on the Landsat 8 satellite captured images of algal blooms around the Great Lakes, visible as swirls of green in this image of Lake St. Clair and in western Lake Erie. via NASA http://ift.tt/1VZie1w

The International Space Station, with a crew of six onboard, is seen in silhouette as it transits the moon at roughly five miles per second, Sunday, Aug. 2, 2015, Woodford, VA. via NASA http://ift.tt/1IRWKQp

A second full moon for the month of July is seen next to the dome of the U.S. Capitol on Friday, July 31, 2015 in Washington. via NASA http://ift.tt/1KHzK49

This photograph of NASA astronaut Serena Aunon (@AstroSerena) moving tools and equipment underwater was taken during the NASA Extreme Environment Mission Operations (NEEMO) 20 mission. NEEMO 20 is focusing on evaluating tools and techniques being tested for future spacewalks on a variety of surfaces and gravity levels. via NASA http://ift.tt/1I7kFb3