Scientists create noctilucent clouds
Noctilucent clouds float much higher than other clouds, allowing them to shine when the sun is below the horizon.
The New Scientist reports that an experiment aimed at creating an artificial noctilucent cloud at the edge of space could shed light on the mysterious high-altitude objects. At the end of September a rocket was launched to create the artificial cloud.
To read the full report, view the gallery and see a video of the experiment click here