NASA: Astronomy Picture of the Day(2023-05-21)

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 <Tardigrade in Moss> 입니다.

해당 작품의 소유권은 Science Source Images 에게 있습니다.

 

Is this an alien? Probably not, but of all the animals on Earth, the tardigrade might be the best candidate. That's because tardigrades are known to be able to go for decades without food or water, to survive temperatures from near absolute zero to well above the boiling point of water, to survive pressures from near zero to well above that on ocean floors, and to survive direct exposure to dangerous radiations. The far-ranging survivability of these extremophiles was tested in 2011 outside an orbiting space shuttle. Tardigrades are so durable partly because they can repair their own DNA and reduce their body water content to a few percent. Some of these miniature water-bears almost became extraterrestrials in 2011 when they were launched toward to the Martian moon Phobos, and again in 2021 when they were launched toward Earth's own moon, but the former launch failed, and the latter landing crashed. Tardigrades are more common than humans across most of the Earth. Pictured here in a color-enhanced electron micrograph, a millimeter-long tardigrade crawls on moss. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)