General astronomy

General astronomy

Contributors in General astronomy

General astronomy

point on the sky where the ecliptic is furthest from the celestial equator by 23.5°. When the Sun is at the solstice point we have either the longest amount of daylight (summer: June 21 for northern ...

south celestial pole

Astronomy; General astronomy

(SCP): projection of the Earth's south pole onto the sky. The SCP altitude = the observer's southern latitude.

spacetime

Astronomy; General astronomy

the four-dimensional combination of space (three dimensions) and time (the fourth dimension). As a consequence of Special Relativity, time and space are not independent of each other and are relative ...

Special Relativity

Astronomy; General astronomy

a theory invented by Albert Einstein to describe measurements of length and time for objects moving at constant velocity. Although it applies to all motion at constant velocity, it must be used ...

cosmological distance

Astronomy; General astronomy

A distance far beyond the boundaries of our Galaxy. When viewing objects at cosmological distances, the curved nature of spacetime could become apparent. Possible cosmological effects include time ...