27 August 2013, 04:00 PM ET
The third of the seven primary mirrors for the Giant Magellan Telescope was cast Saturday at the University of Arizona's Steward Observatory Mirror Lab. The 20-ton mirror was formed by melting chunks of borosilicate glass in a rotating furnace.
27 August 2013, 07:28 AM ET
See stunning Blue Moon photos by SPACE.com readers sent in during the August 2013 full moon. It was a technical Blue Moon, as the third full moon of four summer full moons. It was not the second full moon in August.
24 August 2013, 11:41 AM ET
From amazing shots of the "Blue Moon" to a captivating new star explosion, don't miss these stunning night sky photos by stargazers and SPACE.com readers.
24 August 2013, 10:50 AM ET
From a birth of a star to a "ufo" near the space station, don't miss these amazing space photos of the week for Aug. 24, 2013.
23 August 2013, 07:00 AM ET
A look at NASA's Asteroid Initiative, which aims to park a space rock near the moon.
22 August 2013, 02:38 PM ET
See photos and images of Russian cosmonauts Fyodor Yurchikhin and Alexander Misurkin spacewalking outside the International Space Station on Aug. 22, 2013.
21 August 2013, 04:41 PM ET
See photos and images from NASA's Fermi Gamma-ray space telescope, which scans the sky for gamma-ray bursts, the brightest and most powerful explosions in the universe.
21 August 2013, 03:42 PM ET
See photos from NASA's ' Wave at Saturn' campaign to urge people around the world to wave at the ringed planet on July 19, 2013. On that day, NASA's Cassini spacecraft took a cosmic portrait of Earth as it appeared from Saturn.
21 August 2013, 03:39 PM ET
Thanks to a new camera and an adaptive optics system that cancels out the blurring effects of Earth's atmosphere, astronomers can now photograph the sky with unprecedented sharpness in visible light.
21 August 2013, 03:00 PM ET
See amazing photos of the night and daytime sky by stargazers on and off the planet in August 2013. Views of planets, stars and even the sun reveal amazing sites.
20 August 2013, 10:01 AM ET
Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have obtained a vivid close-up view of material streaming away from a newborn star.
17 August 2013, 07:00 AM ET
From the beginning of an aurora to starry sky over a national park, don't miss these jawdropping night sky photos by stargazers and SPACE.com readers.
17 August 2013, 12:39 AM ET
From a new star explosion to the possibilities of the hyperloop, don't miss these amazing space photos of the week for Aug. 18, 2013.
16 August 2013, 11:55 AM ET
Two Russian cosmonauts worked outside the International Space Station on Aug. 16, 2013. See how cosmonauts Fyodor Yurchikhin and Alexander Misurkin did the space work here.
15 August 2013, 01:30 PM ET
See photos and images of Nova Delphinus 2013, a new star explosion discovered by Japanese amateur astronomer Koichi Itagaki on Aug. 14, 2013.
15 August 2013, 11:04 AM ET
See photos from NASA's DC-X rocket project in the 1990s, which built and launched a prototype for vertical launch and landing.
15 August 2013, 11:00 AM ET
The "cosmic zoo" of galaxies formed in the early years of the universe are as diverse as they are today, according to new research. Astronomers using the Hubble Space Telescope found that the assorted range of galaxy types seen today were also present for
14 August 2013, 09:09 AM ET
See photos of NASA's only pair of twin astronauts.
14 August 2013, 07:16 AM ET
See fantastic photographs of Earth taken by astronaut Karen Nyberg aboard the International Space Station during Expedition 36/37 in 2013.
13 August 2013, 02:19 PM ET
The annual Perseid meteor shower of 2013 peaks in mid-August. See photos Perseid meteor shower fireballs by stargazers as the 'shooting stars' display nears its peak.
12 August 2013, 04:56 PM ET
See images and concept art for billionaire innovator Elon Musk and his "Hyperloop," an ultrafast transportation system for the 21st century. Here's how it works.
10 August 2013, 08:01 AM ET
From the sky over a Welsh Park to a hazy moon over Canada, don't miss these jawdropping night sky photos by stargazers and SPACE.com readers.
10 August 2013, 07:00 AM ET
From NASA's 1970s visions of a space colony to a mock Mars mission and views of lightning from space, don't miss these amazing space photos of the week for Aug. 10, 2013.
09 August 2013, 02:51 PM ET
The Gemini Observatory's Gemini South telescope is churning out spectacular imagery using its laser-guided Gemini Multi-conjugate adaptive optics System (GeMS). See the dazzling images from and of the telescope in this SPACE.com gallery.
09 August 2013, 12:19 PM ET
The family that builds robots together stays together, as seen by the example of the Beatty family.
06 August 2013, 07:59 PM ET
See mission pictures from the months-long HI-SEAS mock Mars mission to test space food for deep-space exploration in Hawaii. Volunteer scientists spent months training for the three-month excursion in Hawaii.
06 August 2013, 04:46 PM ET
Lightning on Earth can be a spectacular sight, but astronauts in space have a unique view on the electrical events. See dazzling photos of Earth’s lightning as seen from space in these cosmic images.
06 August 2013, 12:24 PM ET
NASA’s Mars rover Curiosity landed on the Red Planet on Aug. 5, 2012 in a dazzling space engineering feat. One year later, the rover has found evidence that Mars was once habitable, had running water and more.
06 August 2013, 11:54 AM ET
At four times the size of Jupiter, this alien planet may be huge, but it's the smallest photographed around a star like our sun. Bluer than expected, the exoplanet dubbed GJ 504b is likely pinkish to dark magenta in color.
05 August 2013, 10:34 AM ET
See photos from the new TriStar movie 'Elysium,' written and directed by Neill Blomkamp, starring Matt Damon. The film opens August 9, 2013.
05 August 2013, 09:59 AM ET
In honor of NASA's Mars rover Curiosity's one year anniversary on the surface of the Red Planet, Barbie's career of the year is Mars explorer. Here's a look at her other space-age looks throughout the years.
05 August 2013, 08:17 AM ET
Three space colony summer studies were conducted at NASA's Ames Research Center in the 1970s. A number of artistic renderings of the concepts were made.