Forsyth Petroglyph Reveals Comet Impact?

Designs on the Forsyth Petroglyph in Georgia may include astronomical representations of stars, the constellation Draco, the Pleiades asterism, a comet, and meteors or comet fragments and may be a record of a comet impact event that caused a severe weather event in 536 AD.

In Peru, scientists discover the oldest solar observatory in the Americas

As archaeologists evaluate whether an ancient temple in Buena Vista, Peru, functioned as a calendar, a different research team is preserving the remains of an unusually elaborate astronomical complex just north, in Chankillo. This solar observatory is considered the oldest in the Americas, dating back to the 4th century B.C., and it offers unique physical evidence that a sun cult inhabited Peru at least 1,500 years before the Incas.

Ancient Rock Art Depicts Exploding Star

A rock carving discovered in Arizona might depict an ancient star explosion
seen by Native Americans a thousand years ago, scientists announced today.

If confirmed, the rock carving, or “petroglyph” would be the only known
record in the Americas of the well-known supernova of the year 1006.

Heavens offer unique clues to the seasons

Before the advent of calendars, the only way to mark the changing of the seasons was through direct observation. Ancient peoples observed the passage of the sun north from the Winter Solstice, and then south from the Summer Solstice. In Mesoamerica the people observed the sun passing directly overhead twice a year by using special tubes in the temples that pointed at the zenith.

Brazilian Stonehenge Discovered

Brazilian archaeologists have found an ancient stone structure in a
remote corner of the Amazon that may cast new light on the region’s
The site, thought to be an observatory or place of worship, pre-dates
European colonisation and is said to suggest a sophisticated
knowledge of astronomy.
Its appearance is being compared to the English site of Stonehenge.

Ocmulgee Mounds (1000 AD)

Ocmulgee Mounds located in Macon, Geogia consists of seven mounds and associated plazas. The Great Temple Mound at Ocmulgee was built atop the Macon Plateau and rises 56 feet high from the surface of the plateau.