Comet McNaught 2009 R1 is pictured in the night sky over Jauerling, Austria, on June 9. The green shimmering comet can be seen with the naked eye under ideal conditions and might become as bright as Ursa Major within June. Michael Jaeger/Newscom/FILE
A detailed false color image of Saturn is seen in a combination of three images taken by the Hubble Space Telescope. Different colors, in reflected infrared light, indicate varying heights and compositions of cloud layers generally thought to consist of ammonia ice crystals. Two of Saturn's many moons also appear, Tethys is at the upper right and Dione is at the lower left. NEWSCOM
NASA image shows Cat's Eye Nebula, made by combining data from two of NASA's Great Observatories--Chandra and the Hubble Space Telescope. Data from the Chandra X-ray Observatory revealed a bright central star surrounded by a cloud of multimillion-degree gas in the planetary nebula known as the Cat's Eye. NEWSCOM
Comet McNaught photographed near Ashburton, South Island, New Zealand. NEWSCOM
File photo showing impact of Comet Shoemaker-Levy on Jupiter. NASA photograph. NEWSCOM
Evidence from NASA's Chandra X-ray Observatory and the Magellan telescopes suggest a star was torn apart by an intermediate-mass black hole in a globular cluster. In this image, X-rays from Chandra are shown in blue and are overlaid on an optical image from the Hubble Space Telescope. NEWSCOM
A South Korean Space Launch Vehicle takes off from the launch pad at the Naro Space Center in Goheung, South Korea, on June 10. AP
The spiral galaxy NGC 6744 is seen from NASA's Wide-field Infrared Survey Explorer (WISE). The mosaic of frames covers an area three full moons tall and three full moons wide and is located in a constellation in the southern sky, Pavo. There are relatively few large spiral galaxies in the local universe (within about 40 million light-years of our Local Group of galaxies). NGC 6744 is about 30 million light-years away and, compared to other local galaxies, is very similar to our Milky Way galaxy. The galaxy's disk is about 175,000 light-years across, which is larger than the Milky Way's disk, making NGC 6744 kind of like the Milky Way's big brother. NASA/JPL-Caltech/UCLA/AFP/Getty Images/Newscom
West-facing side of an impact crater in the mid-latitudes of Mars' northern hemisphere are seen here. Like many mid-latitude Martian craters, this one has gullies along its walls that are composed of alcoves, channels, and debris aprons. The origins of these gullies have been the subject of much debate; they could have been formed by flowing water, liquid carbon dioxide or dry granular flows. Newscom
NASA astronaut Steve Bowen, STS-132 mission specialist, participates in one of the mission's space walks on May 19. Newscom
Iran and five world powers agreed last week to extend by four months a deadline for reaching a final deal aimed at preventing Iran from acquiring a nuclear bomb. But a yawning gulf still has to be bridged.
Though diplomats from Iran and six world powers are talking up the “substantial progress” that led to an extension of nuclear talks until November, crucial differences still threaten a final deal to ensure Iran can never produce a bomb.