- A year is the time
taken for
astronomical objects to
complete one orbit. For example, a year on
Earth is the time
taken for
Earth to
revolve around the...
-
expressed by
using metric prefixes with the annum, such as
megaannum (Ma) or
gigaannum (Ga).[citation needed] The SI unit of
angle is the radian, but degrees...
- SI unit of
electric current equal to 1,000,000,000 (one billion) amps
Gigaannum (Ga), a unit of time
equal to 1,000,000,000 (one billion) years. Go Ahead...
- instance, for hard disk capacity, 120 GB = 120000000000bytes; gi****ear or
gigaannum—one
billion (109) years,
sometimes abbreviated Gyr, but the preferred...
-
kiloannum (thousands
years ago); Ma =
megaannum (millions
years ago); Ga =
gigaannum (billions
years ago). See also:
Geologic time
scale • Geology portal...
-
kiloannum (thousands
years ago); Ma =
megaannum (millions
years ago); Ga =
gigaannum (billions
years ago). See also:
Geologic time
scale • Geology portal...
-
kiloannum (thousands
years ago); Ma =
megaannum (millions
years ago); Ga =
gigaannum (billions
years ago). See also:
Geologic time
scale • Geology portal...
-
kiloannum (thousands
years ago); Ma =
megaannum (millions
years ago); Ga =
gigaannum (billions
years ago). See also:
Geologic time
scale • Geology portal...
- 000 years.
Other SI
prefix units commonly used by
geologists are Ga (
gigaannum,
billion years), and ka (kiloannum,
thousand years), with the
latter often...
-
years (above timelines) /
Thousands of
years (below timeline) 4.567 Ga (
gigaannum:
billion years ago):
Solar system formation 4.54 Ga: Accretion, or formation...
