The 4 eras are Cenozoic era, the mesozoic era, the paleozoic era, and the precambrian era.
Geological eras can be divided into periods, epochs and ages.
Anything outside the Earth is astronomy.
astronomy, astrophysics
1. Production era 2.Product era 3.Selling era 4.Marketing era 5.Selling era
Arthur Beer has written: 'Vistas in Astronomy' -- subject(s): Astronomy 'The radiant universe' -- subject(s): Astronomy, Pictorial works 'Vistas in Astronomy, No 3 and No 4' 'Vistas in Astronomy, No 3 and No 4 (Pts 3 & 4 of 4 Pts)'
Most scientists agree that there are 3 eras for every eon.
Astronomy Observations and Theories - 2005 The Birth of Astronomy 1-4 was released on: USA: 21 June 2006
as·tron·o·myThus, there are4 4 syllables in astronomy.4 syllables.
Denis McQuail
An archaeoastronomer is an astronomer whose specialism is archaeastronomy, the historical study of astronomy, including astronomical systems and methods of ancient cultures embracing astrology and cosmology of past eras.
The three eras of geologic time are the Paleozoic, Mesozoic, and Cenozoic eras. The Paleozoic era is known for the development of marine life, the Mesozoic era is often referred to as the "Age of Dinosaurs," and the Cenozoic era is characterized by the diversification of mammals and the rise of humans.
The geologic time scale is divided into four eras: the Precambrian, Paleozoic, Mesozoic, and Cenozoic eras. Each era represents a distinct span of time in Earth's history with characteristic geological and biological features.
Precambrian, Paleozoic, Mesozoic, and Cenozoic.
4 if you count the capsule monsters
precambrian era, paleozoic era, mesozoics era, cenozoic era
Eras was created in 1976.