蓝绿色仙境上空的银河

蓝绿色仙境上空的银河

ByNASA中文

2023年5月29日 Milky Way over a Turquoise Wonderland Image Credit & Copyright: Petr Horálek / Institute of Physics in Opava, Sovena Jani Explanation: What glows there? The answer depends: sea or sky? In the sea, the unusual blue glow is bioluminescence. Specifically, the glimmer arises from Noctiluca scintillans, single-celled plankton stimulated by the lapping waves. The plankton use their glow to startle and illuminate predators. This mid-February display on an island in the Maldives was so intense that the astrophotographer described it as a turquoise wonderland. In the sky, by contrast, are the more familiar glows of stars and nebulas. The white band rising from the artificially-illuminated green plants is created by billions of stars in the central disk of our Milky Way Galaxy. Also visible…

俄勒冈海岸的海与天之辉光

俄勒冈海岸的海与天之辉光

ByNASA中文

2022年9月4日 Sea and Sky Glows over the Oregon Coast Image Credit & Copyright: Rudy Montoya Explanation: Every step caused the sand to light up blue. That glow was bioluminescence — a blue radiance that also lights the surf in this surreal scene captured in mid-2018 at Meyer’s Creek Beach in Oregon, USA. Volcanic stacks dot the foreground sea, while a thin fog layer scatters light on the horizon. The rays of light spreading from the left horizon were created by car headlights on the Oregon Coast Highway (US 101), while the orange light on the right horizon emanates from a fishing boat. Visible far in the distance is the band of our Milky Way Galaxy, appearing to rise from a dark rocky outcrop. Sixteen images…