This is the ecliptic. The Sun crosses the celestial equator twice each year at the March and September equinoxes. The Sun’s highest point, 23½° above the celestial equator, occurs at the June ...

It’s the intersection of the celestial equator with the ecliptic, the sun’s path across the sky as it moves relative to the fixed stars (because of our changing perspective on it as Earth ...

The zodiac was initially developed around 600 BCE and its zero point was defined as the point that the ecliptic intersected with the celestial equator — the great circle of the terrestrial ...

In special years this tilt adds to the ecliptic's own inclination and ... from about 28.5 degrees north of the celestial equator to 28.5 degrees south. In contrast, during 2016-16 the lunar ...

Description of Earth's axial tilt (obliquity) and its relationship to the planes of the ecliptic, the celestial equator, and the axis of rotation. Earth is shown as viewed from the Sun and its orbit ...

At 9.01am today, March 20th, the sun crossed the Earth’s equator, marking the vernal equinox, the date when the direction of sunrise is due east and sunset due west. The Earth’s axis is at ...

The scintillation of radio sources caused by the interplanetary medium offers a means of studying the motion of the solar wind well away from the plane of the ecliptic, where direct measurements ...