s*****t
发帖数: 1994 | 1 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
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s*****t
发帖数: 1994 | 2 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 |
|
s*****t
发帖数: 1994 | 3 Sunrise Analemma
Credit & Copyright: Anthony Ayiomamitis
Explanation: Astronomically speaking, at the Equinox on March 21, 0100 UT (March 20,
8:00 PM ET) the season changes. For this Equinox the Sun rises due east as it crosses the
celestial equator heading north. In celebration, consider this spectacular sunrise analemma!
An analemma is the figure-8 loop you get when you mark the position of the Sun at the same
time each day throughout the year. In this remarkable case, 38 separ |
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s*****t
发帖数: 1994 | 4 Sunrise Analemma
Credit & Copyright: Anthony Ayiomamitis
Explanation: Astronomically speaking, at the Equinox on March 21, 0100 UT (March 20,
8:00 PM ET) the season changes. For this Equinox the Sun rises due east as it crosses the
celestial equator heading north. In celebration, consider this spectacular sunrise analemma!
An analemma is the figure-8 loop you get when you mark the position of the Sun at the same
time each day throughout the year. In this remarkable case, 38 separ |
|
s*****t
发帖数: 1994 | 5 Martian Analemma
Digital Illustration Credit & Copyright: Dennis Mammana (Skyscapes)
Explanation: On planet Earth, an analemma is the figure-8 loop you get when you mark the
position of the Sun at the same time each day throughout the year. But similarly marking the
position of the Sun in the Martian sky would produce the simpler, stretched pear shape in this
digital illustration, based on the Mars Pathfinder project's famous Presidential Panorama view
from the surface. The simulation sho |
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s*****t
发帖数: 1994 | 6 Martian Analemma
Digital Illustration Credit & Copyright: Dennis Mammana (Skyscapes)
Explanation: On planet Earth, an analemma is the figure-8 loop you get when you mark the
position of the Sun at the same time each day throughout the year. But similarly marking the
position of the Sun in the Martian sky would produce the simpler, stretched pear shape in this
digital illustration, based on the Mars Pathfinder project's famous Presidential Panorama view
from the surface. The simulation sho |
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