太冷清了，贴个斑竹的近照，要看抓紧# Astronomy - 天文
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A Sunspot Up Close
Credit : Vacuum Tower Telescope, NSO, NOAO
Explanation: Why would a small part of the Sun appear slightly dark? Visible
above is a close-up picture of a sunspot, a depression on the Sun's face that
is slightly cooler and less luminous than the rest of the Sun. The Sun's
complex magnetic field creates this cool region by inhibiting hot material
from entering the spot. Sunspots can be larger than the Earth and typically
last for only a few days. This high-resolution picture also
Credit : Vacuum Tower Telescope, NSO, NOAO
Explanation: Why would a small part of the Sun appear slightly dark? Visible
above is a close-up picture of a sunspot, a depression on the Sun's face that
is slightly cooler and less luminous than the rest of the Sun. The Sun's
complex magnetic field creates this cool region by inhibiting hot material
from entering the spot. Sunspots can be larger than the Earth and typically
last for only a few days. This high-resolution picture also