Related terms:
ago
wmap
cools
hubble
nuclide
emitted
isochron
galaxies
universo
red giant
big bang
inclusions
dark energy
metamorphic
cosmological
astrobiology
stromatolites
life on earth
cyanobacteria
main sequence
comoving distance
billion years ago
billion years old
radiometric dating
radioactive decay
cosmological constant
asymptotic giant branch
hubble ultra deep field
metric expansion of space
cosmic microwave background
Wikipedia sources:
Panspermia
Age of the Earth
Fossil
Oldest rock
World
Red giant
Timeline of the Big Bang
Ages of Man
Prokaryote
Radiometric dating
Inner core
Metric expansion of space
Black Hills
Uranium-238
Observable universe
Life on Mars
Epsilon Eridani
Natural nuclear fission reactor
Timeline of evolution
Planetary nebula
Age of the universe
Hubble Ultra Deep Field
Risks to civilization, humans and planet Earth
Context for words:
billion
years
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