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The solar equator is the latitude on Earth at which the Sun is observed directly overhead at midday. [1] Due to the obliquity of Earth's axis, the solar equator varies during the year, from the Tropic of Capricorn on the December solstice to the Tropic of Cancer on the June solstice.
A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September. [a] More precisely, an ...
The Sun appears to move northward during the northern spring, crossing the celestial equator on the March equinox. Its declination reaches a maximum equal to the angle of Earth's axial tilt (23.44° or 23°26') [ 8 ] [ 9 ] on the June solstice , then decreases until reaching its minimum (−23.44° or -23°26') on the December solstice , when ...
The subsolar point on a planet or a moon is the point at which its Sun is perceived to be directly overhead (at the zenith); [1] that is, where the Sun's rays strike the planet exactly perpendicular to its surface. The subsolar point occurs at the location on a planet or a moon where the Sun culminates at the location's zenith. This occurs at ...
At the equator the sun will be about 23.5 degrees south of directly overhead. Because the full moon is opposite the sun, the moon would appear about 23.5 degrees north of directly overhead at the ...
On the Equator, the noontime Sun will be straight overhead, and thus a vertical stick will cast no shadow, on the equinoxes. On the Tropic of Cancer (about 23.4°N), a vertical stick will cast no shadow on the June solstice (northern hemisphere summer), and the rest of the year its noon shadow will point to the North pole.
As the Earth travels around the sun, it does so at an angle. The equinox arrives on Saturday, marking the start of the fall season for the Northern Hemisphere. Here's what to know about how we ...
Lāhainā Noon, also known as a zero shadow day, is a semi-annual tropical solar phenomenon when the Sun culminates at the zenith at solar noon, passing directly overhead. [1] As a result, the sun's rays will fall exactly vertical relative to an object on the ground and cast no observable shadow. [2]