NASA: Astronomy Picture of the Day(2023-03-28)

lalaloo 입니다.

This photo is the Astronomy Picture of the Day provided by NASA.

나사에서 매일 업데이트하는 오늘의 우주 모습입니다.

 

Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

이 사진의 제목은 <A Multiple Green Flash Sunset> 입니다.

해당 작품의 소유권은 T. SlovinskýP. HorálekIoP OpavaCTIONOIRLabNSFAURA 에게 있습니다.

 

Yes, but can your green flash do this? A green flash at sunset is a rare event that many Sun watchers pride themselves on having seen.  Once thought to be a myth, a green flash is now understood to occur when the Earth's atmosphere acts like both a prism and a lens. Different atmospheric layers create altitude-variable refraction that takes light from the top of the Sun and disperses its colors, creates two images, and magnifies it in just the right way to make a thin sliver appear green just before it disappears. Pictured, though, is an even more unusual sunset. From the high-altitude Cerro Tololo Inter-American Observatory in Chile one day last April, the Sun was captured setting beyond an atmosphere with multiple distinct thermal layers, creating several  mock images of the Sun.  This time and from this location, many of those layers produced a green flash simultaneously. Just seconds after this multiple-green-flash event was caught by two well-surprised astrophotographers, the Sun set below the clouds.