When NASA engineers were looking for a place to build a network of large radio antennas in the 1950s, they knew they needed somewhere quiet. http://www.nasa.gov/sites/default/files/thumbnails/image/goldstone_oli_2018124_lrg.jpg

This HiRISE image from NASA's Mars Reconnaissance Orbiter (MRO) captures a new, dated (within about a decade) impact crater that triggered a slope streak. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22513.jpg

The Moon begins to rise behind the ARADS rover during the 2017 season of field tests in Chile’s Atacama Desert. http://www.nasa.gov/sites/default/files/thumbnails/image/arads25_img_0103.jpg

Sand dunes often accumulate in the floors of craters. In this region of Lyot Crater, NASA's Mars Reconnaissance Orbiter (MRO) shows a field of classic barchan dunes on Jan. 24, 2018. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22512.jpg

On June 21, 1975, NASA successfully launched the eighth Orbiting Solar Observatory aboard a Delta rocket from Cape Canaveral, Florida. This satellite was the final in a series of spacecraft specifically designed to look at the Sun in high-energy wavelength bands. http://www.nasa.gov/sites/default/files/thumbnails/image/16501277241_f0d41c0e14_o.jpg

This image captures swirling cloud belts and tumultuous vortices within Jupiter’s northern hemisphere. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22424.jpg

SpaceX’s Crew Dragon is at NASA’s Plum Brook Station in Ohio, to undergo testing in the In-Space Propulsion Facility. The chamber will allow SpaceX and NASA to verify Crew Dragon’s ability to withstand the extreme temperatures and vacuum of space. http://www.nasa.gov/sites/default/files/thumbnails/image/dragon-2-in-tvac.jpg

If you have ever seen a series of concentric rings of color near a mist or fog, you have likely seen a glory. This colorful optical phenomenon, bright red on the outside and blue toward the center, forms when water droplets scatter sunlight back toward a source of light. http://www.nasa.gov/sites/default/files/thumbnails/image/guadalupe_amo_2018154_lrg.jpg

The Earth's limb and the Pacific Ocean contrast segments of the International Space Station's Kibo laboratory module built by the Japan Aerospace Exploration Agency in this June 23, 2018 image. At right is a portion of the Experiment Logistics Module, Pressurized Section (ELM-PS) which is the Kibo lab's storage facility. http://www.nasa.gov/sites/default/files/thumbnails/image/43026247071_324656e26b_o.jpg

NASA’s Ikhana aircraft, based at the agency’s Armstrong Flight Research Center in Edwards, California, takes off on June 12, 2018, for the agency’s first large-scale, remotely-piloted aircraft flight in the national airspace without a safety chase aircraft. http://www.nasa.gov/sites/default/files/thumbnails/image/afrc2018-0127-12.jpg

At 5:42 a.m. EDT Friday, June 29, 2018, SpaceX's Dragon spacecraft lifts off on a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. Dragon is carrying more than 5,900 pounds of research, equipment, cargo and supplies that will support dozens of investigations aboard the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/42374725534_a653d1b7cb_k.jpg

Citizen scientist Kevin M. Gill created this image of Jupiter using data from the Juno spacecraft's JunoCam imager. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22425.jpg

Like a July 4 fireworks display a young, glittering collection of stars looks like an aerial burst. http://www.nasa.gov/sites/default/files/thumbnails/image/stsci-gallery-1022a-2000x960.jpg

Light from the County Fire illuminated the night skies of Northern California when the Suomi NPP satellite acquired this image overnight on July 1, 2018. http://www.nasa.gov/sites/default/files/thumbnails/image/california_vir_2018182_lrg.jpg

One of the most actively changing areas on Mars are the steep edges of the North Polar layered deposits. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22535.jpg

Posted to Twitter by @Astro_Alex, European Space Agency astronaut Alexander Gerst, this image shows our planet's Moon as seen from the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/iss056e025635.jpg

NASA has selected six women and men to join the elite corps of flight directors who will lead mission control for a variety of new operations at the agency’s Johnson Space Center in Houston. http://www.nasa.gov/sites/default/files/thumbnails/image/jsc2018e061789.jpg

As the International Space Station flew overhead, NASA astronaut Ricky Arnold captured this photograph of a changing landscape in the heart of Madagascar, observing drainage into the sea in the Betsiboka Estuary due to decimation of rainforests and coastal mangroves. http://www.nasa.gov/sites/default/files/thumbnails/image/7.11-400d1709madagascar.jpg

The Eagle Nebula, also known as Messier 16, contains the young star cluster NGC 6611. It also the site of the spectacular star-forming region known as the Pillars of Creation, which is located in the southern portion of the Eagle Nebula. http://www.nasa.gov/sites/default/files/thumbnails/image/m16-optical-xray.jpg

Launched 15 years ago, the Spitzer Space Telescope has made many discoveries, including this detection of the merger of two neutron stars. http://www.nasa.gov/sites/default/files/thumbnails/image/ssc2017-14a1.jpg