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| |  Unusual dune field on a crater floor in Terra Cimmeria on Mars. Image via NASA/JPL-Caltech/Arizona State University. | | |
Weird hexagonal dune field seen on Mars | | Mars has sand dunes, as Earth does. But now, NASA's Odyssey orbiter has revealed something odd: a large dune field shaped roughly like a hexagon. The finding is expected to provide more clues as to how dunes form in Martian winds. Read more. | | |
Japan's Hayabusa2 lands on distant asteroid | | The Hayabusa2 spacecraft touched down briefly and successfully on asteroid Ryugu Friday morning, 200 million miles (300 million km) from Earth. It successfully fired a bullet into the asteroid to puff up dust for sample collection. Read more. | | |
Rosetta's comet sculpted by stress | | The Rosetta space mission revealed a comet as 2 icy balls apparently stuck together billions of years ago. Now scientists say the comet's double-lobed structure guided its evolution. Read more.
 Rosetta's comet - aka 67P/Churyumov-Gerasimenko - as captured in March 2016, when the spacecraft was about 200 miles (329 km) away. Image via ESA. | | |
