卢波夫纳城堡与满月

卢波夫纳城堡与满月

ByNASA中文

2022年7月15日 Lubovna Full Moon Petr Horalek / Institute of Physics in Opava Explanation: On July 13 this well-planned telephoto view recorded a Full Moon rising over Lubovna Castle in eastern Slovakia. The photographer was about 3 kilometers from the castle walls and about 357,000 kilometers from this Full Moon near perigee, the closest point in its elliptical orbit. Known to some as supermoons, full moons near perigee are a little brighter and larger in planet Earth’s sky when compared to full moons that occur near the average lunar distance of around 384,000 kilometers. Of course any Full Moon near the horizon can show the effects of refraction over a long sight-line through dense clear atmosphere. In this image, atmospheric refraction creates the slight green flash…

梦幻城堡上空的NEOWISE彗星

梦幻城堡上空的NEOWISE彗星

ByNASA中文

2020年7月23日 Fairytale NEOWISE Image Credit & Copyright: Stephane Guisard (Los Cielos de America, TWAN) Explanation: Comet dust falls through a twilight sky in this dream-like scene, but it’s not part of a fairytale movie. Still, Castle Neuschwanstein, nestled in the Bavarian Alps, did inspire Disneyland’s Sleeping Beauty Castle. Captured on July 20, the bright streak above the castle towers is likely a Perseid meteor. Though it peaks near mid-August, the annual summer meteor shower is active now. The meteor trail over the fairytale castle can be traced back to the shower’s radiant in the heroic constellation Perseus off the top right of the frame. Perseid meteors are produced by dust from periodic Comet Swift-Tuttle. With its own broad dust tail now sweeping through northern skies…