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词汇 Stellar day
分类 英语词汇 英语翻译词典
释义

Stellar day

英语百科

Earth's rotation

An animation showing the rotation of the Earth around its own axis.
Northern night sky over the Nepal Himalayas, showing the paths of the stars as the earth rotates.
Starry circles arc around the south celestial pole, seen overhead at ESO's La Silla Observatory.[22]
On a prograde planet like the Earth, the stellar day is shorter than the solar day. At time 1, the Sun and a certain distant star are both overhead. At time 2, the planet has rotated 360° and the distant star is overhead again but the Sun is not (1→2 = one stellar day). It is not until a little later, at time 3, that the Sun is overhead again (1→3 = one solar day).

Earth's rotation is the rotation of the planet Earth around its own axis. The Earth rotates from the west towards east. As viewed from North Star or polestar Polaris, the Earth turns counter-clockwise.

The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. This point is distinct from the Earth's North Magnetic Pole. The South Pole is the other point where the Earth's axis of rotation intersects its surface, in Antarctica.
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