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The timeline of the early universe outlines the formation and subsequent evolution of the Universe from the Big Bang (13.799 ± 0.021 billion years ago) [1] to the present day. An epoch is a moment in time from which nature or situations change to such a degree that it marks the beginning of a new era or age .
Based on Jupiter's composition, researchers have made the case for an initial formation outside the molecular nitrogen (N 2) snow line, which is estimated at 20–30 AU (3.0–4.5 billion km; 1.9–2.8 billion mi) from the Sun, and possibly even outside the argon snow line, which may be as far as 40 AU (6.0 billion km; 3.7 billion mi).
This model posits that, 4.6 billion years ago, the Solar System was formed by the gravitational collapse of a giant molecular cloud spanning several light-years. Many stars, including the Sun, were formed within this collapsing cloud. The gas that formed the Solar System was slightly more massive than the Sun itself.
By 3.5 billion years from now, Earth's surface conditions will be similar to those of Venus today. [117] Relative size of the Sun as it is now (inset) compared to its estimated future size as a red giant. Around 5.4 billion years from now, the core of the Sun will become hot enough to trigger hydrogen fusion in its surrounding shell. [118]
Mars reaches the same solar flux the Earth did when it first formed, 4.5 billion years ago from today. [92] < 5 billion The Andromeda Galaxy will have fully merged with the Milky Way, forming an elliptical galaxy dubbed "Milkomeda". [95] There is also a small chance of the Solar System being ejected. [95] [108] The planets of the Solar System ...
It suggests that rock samples from the Apollo missions date back to a melting event, not to the moon's formation. ... moon formed around 4.51 billion years ago — more than 100 million years ...
Jupiter XXI i: 5 December 2000 p: 5 January 2001 Dia: S/2000 J 11: Jupiter LIII Date Name Temporary designation Image Permanent designation Discoverer(s) and notes i: 9 December 2001 p: 16 May 2002 Hermippe: S/2001 J 3: Jupiter XXX Sheppard, Jewitt, Kleyna [37] [107] [108] Eurydome: S/2001 J 4: Jupiter XXXII Sponde: S/2001 J 5: Jupiter XXXVI ...
Estimates on when the planet’s inner core may have solidified — when iron first crystallized at the center of the planet — once ranged from 500 million to 2.5 billion years ago.