Geological eras can be divided into periods, epochs and ages.
astonomy actually its astronomy...
The 4 eras are Cenozoic era, the mesozoic era, the paleozoic era, and the precambrian era.
Eons, Eras,Epochs, and period
Astronomy.
There are 4 eras, and they are the Hadean, Archean, Proterozoic, and Phanerozoic eras.
Four eras. that is Cenozoic,mesozoic,paleozoic and precambrian
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)'
Astronomy Observations and Theories - 2005 The Birth of Astronomy 1-4 was released on: USA: 21 June 2006
The Earth has had 4 eras. The Precambrian time, Paleozoic era, Mesozoic, and the era we are in now, the Cenozoic.
as·tron·o·myThus, there are4 4 syllables in astronomy.4 syllables.
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.
Denis McQuail
Precambrian, Paleozoic, Mesozoic, and Cenozoic.
4 if you count the capsule monsters
eras
Eras was created in 1976.