ๆฅๅ็นใซใใใๅๆ
Saturn at Equinox
ๅๆใฎ็ฐ้ขใๅคช้ฝใซๆญฃๅฏพใใใใๅๆใฏใฉใฎใใใซ่ฆใใใ ใใใ๏ผๅ
ๆใพใงใฏ่ชฐใ็ฅใใชใใฃใใๅฐ็ใใ่ฆใใจใ15ๅนดใใจใซๅๆใฎ็ฐใฏๅฐ็ใฎๆนใๅใใๆถใใใใใซ่ฆใใใ็ฐใๆถใใใฎใฏใใฏใ่ฌใงใฏใชใใๅๆใฎ็ฐใฏ้ๅธธใซ่ใใๅฐ็ใฏๅคช้ฝใซ้ๅธธใซ่ฟใใใใ็ฐใๅคช้ฝใฎๆนใๅใใจใๅฐ็ใซๅฏพใใฆใปใผ็ๆจชใๅใใใจใซใชใใๅนธใใชใใจใซใใใฎ3ๅๅนด็ดใซใใใฆใไบบ้กใฏๆฅๅ็นใฎ็ฐใๆจชใใ่ฆใใใจใใงใใๅฎๅฎ่นใๆใคใปใฉ้ฒๆญฉใใใๅ
ๆใๅๆใๅจๅใใๅฎๅฎ่นใซใใทใผใใฏใๆฅๅ็นใฎๅๆใฎ็ฐใฎใใใพใงใซใชใไธ้ฃใฎๅ็ใๆฎๅฝฑใใใใจใซๆๅใใใใใฎใใใช75ๆใฎ็ปๅใใใธใฟใซๅๆใใใใฎใไธใซ็คบใใใฆใใใ็ฐใฏ็ฐๅธธใซๆใ่ฆใใๅๆใฎ้ฒ้ ใซ้ๅธธใซ็ดฐใ็ฐใฎๅฝฑใฎ็ทใ่ฆใใใ็ฐ้ขใใ็ชใๅบใฆใใ็ฉไฝใฏๆใใ็
งใใใใ้ทใๅฝฑใ่ฝใจใใฆใใใใใใใฎ็ปๅใๅๆใใใใจใงใไบบ้กใฏๅๆใฎ็ฐใๆงๆใใ็ฒๅญใฎๅ
ทไฝ็ใชๅคงใใใใ่ป้้ๅใฎไธ่ฌ็ใชๅๅญฆใ็่งฃใใใฎใซๅฝน็ซใคๅฏ่ฝๆงใใใใ
ๅๆ๏ผEnglish๏ผ
How would Saturn look if its ring plane pointed right at the Sun? Before last month, nobody knew. Every 15 years, as seen from Earth, Saturn's rings point toward the Earth and appear to disappear. The disappearing rings are no longer a mystery -- Saturn's rings are known to be so thin and the Earth is so near the Sun that when the rings point toward the Sun, they also point nearly edge-on at the Earth. Fortunately, in this third millennium, humanity is advanced enough to have a spacecraft that can see the rings during equinox from the side. Last month, that Saturn-orbiting spacecraft, Cassini, was able to snap a series of unprecedented pictures of Saturn's rings during equinox. A digital composite of 75 such images is shown above. The rings appear unusually dark, and a very thin ring shadow line can be made out on Saturn's cloud-tops. Objects sticking out of the ring plane are brightly illuminated and cast long shadows. Inspection of these images may help humanity understand the specific sizes of Saturn's ring particles and the general dynamics of orbital motion.
๏ผผ ใใฎๆๅใๅฎๅฎไปฒ้ใซใทใงใข ๏ผ
ๅฎๅฎใXใงใทใงใข
ยฉ NASA / APOD