Astronomy Picture of Day: Analemma# Astronomy - 天文
s*t
1 楼
Analemma
Explanation: If you took a picture of the Sun at the same time each
day, would it remain in the same position? The answer is no, and the shape
traced out by the Sun over the course of a year is called an analemma. The
Sun's apparent shift is caused by the Earth's motion around the Sun
when combined with the tilt of the Earth's rotation axis. The Sun will
appear at its highest point of the analemmas during summer
and at its lowest during winter. Analemmas created from different Earth
lat
Explanation: If you took a picture of the Sun at the same time each
day, would it remain in the same position? The answer is no, and the shape
traced out by the Sun over the course of a year is called an analemma. The
Sun's apparent shift is caused by the Earth's motion around the Sun
when combined with the tilt of the Earth's rotation axis. The Sun will
appear at its highest point of the analemmas during summer
and at its lowest during winter. Analemmas created from different Earth
lat