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[neclar]

When did our Earth appear?

The Earth was formed about 4.54 billion years ago by accretion from the solar nebula, given one-third of the age of the universe.

[qylymla]

The Earth was formed about 4.54 billion years ago by accretion from the solar nebula, given one-third of the age of the universe.

When did the universe appear?

[neclar]

When did the universe appear?

The Big Bang theory is the predominant cosmological description of the development of the Universe. Under this theory, space and time appeared together 13.799 ± 0.021 billion years ago, [2] with a fixed amount of energy and matter that became less as the Universe expanded.