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Mars Exploration Rovers Update: Spirit Finds Past Water at Home, Opportunity Takes in Tierra del Fuego

A.J.S. Rayl • April 30, 2007

The Mars Exploration Rovers (MERs) traveled to new targets and made discoveries ranging from the magnificent to the mundane in April, four fast weeks that essentially led both of the twin robot field geologists to the next phase of their explorations.

Cassini observes a new face of Iapetus

Emily Lakdawalla • April 20, 2007

Cassini has just begun its 44th orbit of Saturn (called Rev 43), and is starting it off with lots of views of famously two-faced Iapetus.

Dione's south pole

Emily Lakdawalla • April 09, 2007

Cassini got a nice "Voyager-class" view of Saturn's moon Dione yesterday, passing about 250,000 kilometers from the moon's south pole.

Space weather affects everyday life on Earth

Emily Lakdawalla • April 04, 2007

According to a press release issued this morning by the National Oceanic and Atmospheric Administration, the enormous solar flare that erupted on December 5 and 6 last year was accompanied by an intense radio burst that caused large numbers of Global Positioning System recivers to stop tracking the signal from the orbiting GPS satellites.

Millions of soundings yield clues to Mars' weather

Bruce Betts • April 03, 2007

Two months after the start of Mars Reconnaissance Orbiter's primary science phase, the Mars Climate Sounder instrument has already acquired more than four million soundings, building toward a vast data set on the three-dimensional structure of Mars' atmosphere over the full Martian year of the orbiter's nominal mission.

astronaut on Phobos
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