events
Halley's Comet last appeared in the inner Solar System.
Related Wikipedia articles
Halley's Comet
Short-period comet visible every 75–77 years
Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years, though with the majority of recorded apparitions occurring after 75–77 years. It last appeared in the inner parts of the Solar System in…Source: Wikipedia (CC BY-SA)
Solar System
The Sun and objects orbiting it
The 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…Source: Wikipedia (CC BY-SA)