X-37B goes missing.

Spaceweather.com noted yesterday that the amateur astronomers have reported the X-37B space plane missing. It did not show up when expected, based on its known orbit. Key quote:

It’s possible that the X-37B has landed. More likely, the space plane has maneuvered into a new orbit and will be recovered again in the nights ahead.

The wind-blown dunes of Mars

The HiRise Camera on Mars Reconnaissance Orbiter has released some wonderful new pictures, showing what are called barchan dunes on Mars.

Barchans are crescent-shaped, with the horns of the crescents pointing downwind. One barchan is visible in the upper part of the image, with the Southeast (lower right) horns longer than the other. This trend, along with the position of the steep face of the dune on the South side, indicates that the predominant winds which formed the dunes came from the North.

There are a lot more great images on the websites above.

Wind-blown dunes

1 499 500 501 502 503 505