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.
Unusual dune field on a crater floor in Terra Cimmeria, on Mars. The interesting patterns of the dunes themselves are contained within a boundary that is roughly hexagon-shaped. Image via NASA/JPL-Caltech/Arizona State University.
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.
A live webcast showed Hayabusa2 scientists nervously monitoring the spacecraft's February 22 touchdown on distant asteroid Ryugu.
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.
Single frame enhanced NavCam image taken on 27 March 2016, when Rosetta was 329 km from the nucleus of Comet 67P/Churyumov-Gerasimenko. The scale is 28 m/pixel and the image measures 28.7 km across. Via ESA
The Chinese spacecraft Chang’e-4 made history earlier this year, when it became the first earthly spacecraft to land on the moon’s far side. Now astronomers have named its landing site.
Raw Change'4 image, showing the Yutu 2 rover. Histograms of the red, green and blue channels are shown on the right. Credit: CNSA/HANDOUT/EPA
Read more at: https://phys.org/news/2019-01-moon-side-red-images.html#jCp