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Dragon offers ticket to Mars
A cargo carrier designed for low Earth orbit could provide a cheap route to the red planet.
Russia takes aim at Phobos
Mission to Martian moon is the country's first interplanetary attempt since 1996.
Comets take pole position as water bearers
Matching chemical signatures indicate that Kuiper comets brought water to Earth.
Climate researchers warn of data crisis
Looming gaps in satellite coverage challenge sustained climate observation.
Galileo gets ready for take off
Europe's satellite navigation system enters test phase.
Megatelescopes look for support
As a huge European observatory nears approval, a National Science Foundation funding competition between equivalent US projects remains in a holding pattern.
Astronomers gear up for asteroid fly-by
An unusually close near-Earth asteroid gets observers excited.
Stellar performance nets physics prize
Nobel for supernovae signals of accelerating Universe.
Sun-watchers hope giant telescope will get green light
Observatory would reveal structures that trigger sunspots and space weather.
Europe looks to Russia after NASA falls short on ExoMars
The US agency's shrinking budget and growing space-telescope costs are squeezing other projects.
Simulated Mars mission 'returns' to Earth
Six crewmen survived 520 days of isolation, but experiment was limited in its realism.
Time is running out for the leap second
Abolition would see 'official' time unmoored from the Sun.
Exoplanet's misstep raises doubts
Astronomers argue over object's status after it unexpectedly veers off course.
Saturn's moon has never-ending winter
Millions of years of snowfall on Enceladus boost promise of subsurface ocean.
Military surveillance data: Shared intelligence
The military has a vast array of scientifically valuable data — some more accessible than you think.