Links to news and images of the 7.5-magnitude earthquake and subsequent tsunami that struck Indonesia on Friday. By Sunday morning, the death toll had gone over 800, with thousands waiting to be rescued. Click in for a compilation of links.
There may be misaligned disks of material rotating around a distant black hole. Rings of gas may be breaking off and colliding, leaving gas to fall directly toward the black hole at unfathomable speeds. Read more.
Smoky air makes it harder for thunderclouds to grow. But pollution - if it's not too heavy - energizes their growth, according to a new study based on satellite data. Read more.
A balloon mission flying over the North Pole captured 6 million images of these bright blue noctilucent clouds as they wafted across the upper atmosphere. Read more and watch a video.
A NASA balloon observed these noctilucent - or night-shining - clouds over the Arctic in July 2018. Image via NASA/PMC Turbo/Joy Ng.
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