Cassini will fly close to Saturn's largest moon one last time. Here's a look back at what the spacecraft has revealed and ahead to scientists' final close glimpses of the moon.
Instruments and techniques
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Earth Science Budget Woes Cast a Shadow on Planetary Scientists
NASA's record-high proposed planetary science budget didn't quell the fears scientists have about cuts to Earth sciences.
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New Report Details How NASA Could Land on Europa
A team of scientists laid out extensive details about a hypothetical future landing mission to find life on Jupiter's moon.
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Schiaparelli Lander Likely Crash-Landed on Mars
After its thrusters shut off prematurely, the European Space Agency's newest lander probably crash-landed from 2–4 kilometers above the surface.
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Rosetta Spacecraft Death-Dives into Comet Companion—On Purpose
On the way to its demise, the probe intimately viewed a dust-spewing pit and measured close up the gravity field, temperature, and other features of the comet.
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Delayed Launch Approved for Next Mars Mission
NASA has set a new 2018 launch date for a spacecraft to probe the Red Planet's interior, after instrument failure hobbled preparations for the mission.
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Precision Landing Will Be Key to NASA's Mars 2020 Rover
Landing robotics distinguish the craft from past models, allowing researchers to target smaller flat areas that are surrounded by rock.
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Final Mirror Segment Added to Powerful Future Space Observatory
After years of planning, testing, and assembly, the James Webb Space Telescope, the world's largest infrared, space-based observatory, is taking shape.
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New Step Toward Finding Earth 2.0
Researchers unveil a way to tease out the wobble of a star caused by unseen planets despite the confounding effects of star spots, which are the sunspots of distant stars.
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Hearing Sparks Concerns About Planetary Science Funding
Members of Congress from both sides of the aisle questioned the administration's proposed cuts and whether support for future missions would be adequate.