Deposits of impact glass have been preserved in Martian craters, including Alga Crater, shown here. Detection of the impact glass by researchers at Brown University, Providence, R.I., is based on data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on NASA's Mars Reconnaissance Orbiter. In color coding based on analysis of CRISM spectra, green indicates the presence of glass. (Blues are pyroxene; reds are olivine.) Credit:Courtesy of NASA/JPL-Caltech/JHUAPL/University…

Deposits of impact glass have been preserved in Martian craters, including Alga Crater, shown here. Detection of the impact glass by researchers at Brown University, Providence, R.I., is based on data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on NASA's Mars Reconnaissance Orbiter. In color coding based on analysis of CRISM spectra, green indicates the presence of glass. (Blues are pyroxene; reds are olivine.) Credit:Courtesy of NASA/JPL-Caltech/JHUAPL/University…

A false-color image of Endurance Crater. In this image, tendrils of sand less than 3.3 ft (1 m) high extend from the main dune field toward the rover. Dunes are a common feature across the surface of Mars. Before the rover headed down to the dunes, mission managers first established whether the slippery slope that led to them was firm enough to ensure a successful drive back out of the crater. Otherwise, the dune field would become a sand trap.

Breathtaking Panoramas and Mosaics from Opportunity Rover's 10 Years on Mars

A false-color image of Endurance Crater. In this image, tendrils of sand less than 3.3 ft (1 m) high extend from the main dune field toward the rover. Dunes are a common feature across the surface of Mars. Before the rover headed down to the dunes, mission managers first established whether the slippery slope that led to them was firm enough to ensure a successful drive back out of the crater. Otherwise, the dune field would become a sand trap.

Sunset on Mars. The Curiosity rover captured the sun setting on April 15, 2015 from the Gale Crater. The color has been calibrated and white-balanced to remove camera artifacts. Image via NASA/JPL-Caltech/MSSS

Sunset on Mars. The Curiosity rover captured the sun setting on April 15, 2015 from the Gale Crater. The color has been calibrated and white-balanced to remove camera artifacts. Image via NASA/JPL-Caltech/MSSS

Solar Eclipse From the International Space Station •  Expedition 43 Flight Engineer Samantha Cristoforetti took a series of photographs of the March 20, 2015 solar eclipse from the International Space Station. Cristoforetti wrote, "Orbital sunrise and the #SolarEclipse... could it go any better?" -  A solar eclipse occurs when the moon passes between Earth and the sun, casting a shadow over Earth. The moon’s shadow masks the solar surface and blocks sunlight from reaching Earth directly –…

Solar Eclipse From the International Space Station

Solar Eclipse From the International Space Station • Expedition 43 Flight Engineer Samantha Cristoforetti took a series of photographs of the March 20, 2015 solar eclipse from the International Space Station. Cristoforetti wrote, "Orbital sunrise and the #SolarEclipse... could it go any better?" - A solar eclipse occurs when the moon passes between Earth and the sun, casting a shadow over Earth. The moon’s shadow masks the solar surface and blocks sunlight from reaching Earth directly –…

The International Space Station, with a crew of six onboard, is seen in silhouette as it transits the moon.

Space Station Lunar Transit

The International Space Station, with a crew of six onboard, is seen in silhouette as it transits the moon.

Magnetar SGR 1745-2900 -   exceptionally close to the supermassive black hole at the center of the Milky Way.  Magnetars are dense, collapsed stars (called “neutron stars”) that possess enormously powerful magnetic fields. - Image Credit: NASA/CXC/INAF/F. Coti Zelati et al.

Magnetar Near Supermassive Black Hole Delivers Surprises

Magnetar SGR 1745-2900 - exceptionally close to the supermassive black hole at the center of the Milky Way. Magnetars are dense, collapsed stars (called “neutron stars”) that possess enormously powerful magnetic fields. - Image Credit: NASA/CXC/INAF/F. Coti Zelati et al.

Hubble’s High-Definition Panoramic View of the Andromeda Galaxy

Image of the Day Gallery

Planetary archive: Rosetta at Mars http://themeridianijournal.com/2014/03/planetary-archive-rosetta-mars

Planetary archive: Rosetta at Mars http://themeridianijournal.com/2014/03/planetary-archive-rosetta-mars

Lava flows might explain a hot spot seen in data from Venus Express spacecraft.

Lava may be flowing from Venus volcano

Lava flows might explain a hot spot seen in data from Venus Express spacecraft.

Scientists don't yet know what to make of a white spot spotted on the dwarf planet Ceres, in the most recent batch of images from NASA's Dawn spacecraft.

Scientists don't yet know what to make of a white spot spotted on the dwarf planet Ceres, in the most recent batch of images from NASA's Dawn spacecraft.

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