Altitude & Azimuth: The Horizontal Coordinate System
Distance IrrelevantThe Celestial SphereThe Celestial HorizonAltitude and AzimuthDepends on Location and TimeDoesn''t Work at The PolesJust as the geographic coordinate system uses latitude and longitude to define any location on Earth, the horizontal coordinate system provides altitude and azimuth angles to locate objects in the sky. 1. Altitude or elevation: The angle the object makes with the horizon. Objects that seem to touch the horizon have an altitude of 0°, while those st...See more on timeanddate Wikipedia
Solar System - Wikipedia
OverviewDefinitionFormation and evolutionGeneral characteristicsSunInner Solar SystemOuter Solar SystemTrans-Neptunian regionThe Solar System consists of the Sun and the objects that orbit it. The name comes from Sōl, the Latin name for the Sun. It formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, creating the Sun and a protoplanetary disc from which the orbiting bodies assembled. The fusion of hydrogen into helium inside the Sun''s core releases energy, which is primarily e