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This artist's concept illustrates the fate of two different planets: the one on the left is similar to Earth, made up largely of silicate-based rocks with oceans coating its surface.
This artist's concept illustrates the fate of two different planets: the one on the left is similar to Earth, made up largely of silicate-based rocks with oceans coating its surface.

A Tale of Two Worlds: Silicate Versus Carbon Planets (Artist Concept)

This artist's concept shows the NASA's WISE spacecraft, in its orbit around Earth. In September of 2013, engineers will attempt to bring the mission out of hibernation to hunt for more asteroids and comets in a project called NEOWISE.
This artist's concept shows the NASA's WISE spacecraft, in its orbit around Earth. In September of 2013, engineers will attempt to bring the mission out of hibernation to hunt for more asteroids and comets in a project called NEOWISE.

NEOWISE: Back to Hunt More Asteroids (Artist Concept)

NASA's Curiosity rover shows the first sample of powdered rock extracted by the rover's drill. The image was taken after the sample was transferred from the drill to the rover's scoop.
NASA's Curiosity rover shows the first sample of powdered rock extracted by the rover's drill. The image was taken after the sample was transferred from the drill to the rover's scoop.

First Curiosity Drilling Sample in the Scoop

This image shows the first holes drilled by NASA's Mars rover Curiosity at Mount Sharp. The loose material near the drill holes is drill tailings and an accumulation of dust that slid down the rock during drilling.
This image shows the first holes drilled by NASA's Mars rover Curiosity at Mount Sharp. The loose material near the drill holes is drill tailings and an accumulation of dust that slid down the rock during drilling.

'Confidence Hills' -- The First Mount Sharp Drilling Site

Smooth surfaces of windblown sand and dust of the 'Rocknest' area signal an appropriate place for NASA's Curiosity to collect and use the mission's first few scoopfuls of soil.
Smooth surfaces of windblown sand and dust of the 'Rocknest' area signal an appropriate place for NASA's Curiosity to collect and use the mission's first few scoopfuls of soil.

Curiosity's Location During First Scooping

The recently formed south polar vortex stands out in the color-swaddled atmosphere of Saturn's largest moon, Titan, in this natural color view from NASA's Cassini spacecraft.
The recently formed south polar vortex stands out in the color-swaddled atmosphere of Saturn's largest moon, Titan, in this natural color view from NASA's Cassini spacecraft.

Polar Vortex in Color

This image shows a small part of the Hofsjökull ice cap in Iceland, which encompasses several glaciers. The fan at upper left is part of a glacier called Mûlajökul.
This image shows a small part of the Hofsjökull ice cap in Iceland, which encompasses several glaciers. The fan at upper left is part of a glacier called Mûlajökul.

NASA Radar Maps the Winter Pace of Iceland's Glaciers

This artist's concept illustrates how charged water particles flow into the Saturnian atmosphere from the planet's rings, causing a reduction in atmospheric brightness.
This artist's concept illustrates how charged water particles flow into the Saturnian atmosphere from the planet's rings, causing a reduction in atmospheric brightness.

Saturn's Ring 'Rain' (Artist Concept)

These small spherules on the Martian surface are near Fram Crater, visited by NASA's Mars Exploration Rover Opportunity during April 2004. The area shown is 1.2 inches (3 centimeters) across.
These small spherules on the Martian surface are near Fram Crater, visited by NASA's Mars Exploration Rover Opportunity during April 2004. The area shown is 1.2 inches (3 centimeters) across.

Martian Concretions Near Fram Crater

On April 28, 2014, NASA's Terra spacecraft spotted signs of activity at Ubinas volcano in the Peruvian Andes. The appearance of a new lava dome in March 2014 and frequent ash emissions are signs of increasing activity at this volcano.
On April 28, 2014, NASA's Terra spacecraft spotted signs of activity at Ubinas volcano in the Peruvian Andes. The appearance of a new lava dome in March 2014 and frequent ash emissions are signs of increasing activity at this volcano.

Ubinas Volcano Activity in Peruvian Andes

This view from the Mastcam on NASA's Curiosity Mars rover shows dramatic buttes and layers on the lower flank of Mount Sharp.
This view from the Mastcam on NASA's Curiosity Mars rover shows dramatic buttes and layers on the lower flank of Mount Sharp.

Mount Sharp Buttes and Layers From Near 'Darwin'

This trio of images depicts satellite observations of declining water storage in California as seen by NASA's GRACE satellites.
This trio of images depicts satellite observations of declining water storage in California as seen by NASA's GRACE satellites.

NASA's GRACE Sees a Drying California

Curiosity held its MAHLI camera about 10 inches away from the top of a rock called 'Bathurst Inlet' for a set of eight images combined into this merged-focus view of the rock.
Curiosity held its MAHLI camera about 10 inches away from the top of a rock called 'Bathurst Inlet' for a set of eight images combined into this merged-focus view of the rock.

'Bathurst Inlet' Rock on Curiosity's Sol 54, Context View

The rover is positioned at a patch of flat outcrop called 'John Klein,' which was selected as the site for the first rock-drilling activities by NASA's Curiosity. This self-portrait was acquired to document the drilling site.
The rover is positioned at a patch of flat outcrop called 'John Klein,' which was selected as the site for the first rock-drilling activities by NASA's Curiosity. This self-portrait was acquired to document the drilling site.

Curiosity Rover's Self Portrait at 'John Klein' Drilling Site

The HiRISE camera on NASA's Mars Reconnaissance Orbiter snapped this series of pictures of sand dunes in the north polar region of Mars. Each panel shows ice cracks releasing dark sand as spring progresses.
The HiRISE camera on NASA's Mars Reconnaissance Orbiter snapped this series of pictures of sand dunes in the north polar region of Mars. Each panel shows ice cracks releasing dark sand as spring progresses.

Seasonal Changes on Far-Northern Mars

This graphic shows results of the first analysis of Martian soil by the CheMin experiment on NASA's Curiosity rover. The image reveals the presence of crystalline feldspar, pyroxenes and olivine mixed with some amorphous (non-crystalline) material.
This graphic shows results of the first analysis of Martian soil by the CheMin experiment on NASA's Curiosity rover. The image reveals the presence of crystalline feldspar, pyroxenes and olivine mixed with some amorphous (non-crystalline) material.

First X-ray View of Martian Soil

Artist's concept of a magneto-optical trap and atom chip to be used by NASA's Cold Atom Laboratory (CAL) aboard the International Space Station.
Artist's concept of a magneto-optical trap and atom chip to be used by NASA's Cold Atom Laboratory (CAL) aboard the International Space Station.

NASA's Cold Atom Laboratory (CAL) Chip (Artist's Concept)

A star's spectacular death in the constellation Taurus was observed on Earth as the supernova of 1054 A.D. This composite image uses data from three of NASA's Great Observatories. The Chandra X-ray, Hubble Space, and Spitzer Space Telescope.
A star's spectacular death in the constellation Taurus was observed on Earth as the supernova of 1054 A.D. This composite image uses data from three of NASA's Great Observatories. The Chandra X-ray, Hubble Space, and Spitzer Space Telescope.

Dead Star Creates Celestial Havoc

This image shows the first holes into rock drilled by NASA's Mars rover Curiosity, with drill tailings around the holes plus piles of powdered rock collected from the deeper hole and later discarded.
This image shows the first holes into rock drilled by NASA's Mars rover Curiosity, with drill tailings around the holes plus piles of powdered rock collected from the deeper hole and later discarded.

Dust from Mars Drilling: Tailings and Discard Piles

InSight will study the Red Planet's interior to advance understanding of the processes that formed and shaped the rocky planets.
InSight will study the Red Planet's interior to advance understanding of the processes that formed and shaped the rocky planets.

Landing Area Narrowed for 2016 InSight Mission to Mars

Using publicly available data, astronomers have confirmed K2's first exoplanet discovery proving Kepler can still find planets.
Using publicly available data, astronomers have confirmed K2's first exoplanet discovery proving Kepler can still find planets.

Reborn Kepler Discovers First K2 Exoplanet (Artist Concept)

NASA's Curiosity Mars rover has driven within robotic-arm's reach of the sandstone slab at the center of this view.
NASA's Curiosity Mars rover has driven within robotic-arm's reach of the sandstone slab at the center of this view.

Sandstone Target 'Windjana' May Be Next Martian Drilling Site

The magnetic field of our Milky Way galaxy as seen by ESA's Planck satellite. This image was compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way.
The magnetic field of our Milky Way galaxy as seen by ESA's Planck satellite. This image was compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way.

Magnetic Map of Milky Way

A Martian rock in the 'Yellowknife Bay' area of Mars' Gale Crater is illuminated by white-light light emitting diodes.
A Martian rock in the 'Yellowknife Bay' area of Mars' Gale Crater is illuminated by white-light light emitting diodes.

MAHLI's First Night Imaging of Martian Rock, White Lighting

NASA's Cassini radar data reveal the depth of a liquid methane/ethane sea on Saturn's moon Titan near the mouth of a large, flooded river valley.
NASA's Cassini radar data reveal the depth of a liquid methane/ethane sea on Saturn's moon Titan near the mouth of a large, flooded river valley.

Plumbing Coastal Depths in Titan's Kraken Mare

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