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The discovery of the star in the Milky Way Galaxy suggests that the galaxy may be at least 3 billion years older than previously thought. [257] [258] [259] Several individual stars have been found in the Milky Way's halo with measured ages very close to the 13.80-billion-year age of the Universe .
years (gal) Millions of years (Ma) Past (years ago) About 61.32 gal Big Bang: About 54 gal Birth of the Milky Way: 20.44 gal Birth of the Sun: 17–18 gal 3937 Ma: Oceans appear on Earth 16.889 gal 3800 Ma: Life begins on Earth: 15.555 gal 3500 Ma: Prokaryotes appear 12 gal 2700 Ma: Bacteria appear 10 gal 2250 Ma
Gya (billion years ago) Event 1 Jan: 13.8: Big Bang, as seen through cosmic background radiation, which would have been last emitted 14 minutes after midnight 19 Jan 13.1 Oldest known Gamma Ray Burst: 26 Jan 12.85 First galaxies form: 16 Mar: 11: Milky Way Galaxy formed 13 May: 8.8: Milky Way Galaxy disk formed 2 Sep: 4.57: Formation of the ...
1995 — First detection of small-scale structure in the cosmic microwave background. 1995 — Hubble Deep Field survey of galaxies in field 144 arc seconds across. 1998 — The 2dF Galaxy Redshift Survey maps the large-scale structure in a section of the Universe close to the Milky Way. 1998 — The Hubble Deep Field South is compiled.
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies. Galaxy formation is hypothesized to ...
God - Wikipediawikipedia.org
Approximately five billion years from now, or 19 billion years after the Big Bang, the Milky Way and the Andromeda galaxy will collide with one another and merge into one large galaxy based on current evidence.
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. [1] [2] The word is derived from the Greek galaxias ( γαλαξίας ), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
The Large Magellanic Cloud (LMC) is a dwarf galaxy and satellite galaxy of the Milky Way. At a distance of around 50 kiloparsecs (163,000 light-years), the LMC is the second- or third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal (c. 16 kiloparsecs (52,000 light-years) away) and the possible dwarf irregular galaxy called the Canis Major Overdensity.
The Solar System is located in the Milky Way, a barred spiral galaxy with a diameter of about 100,000 light-years containing more than 100 billion stars. The Sun is part of one of the Milky Way's outer spiral arms, known as the Orion–Cygnus Arm or Local Spur.
The Milky Way has several smaller galaxies gravitationally bound to it, as part of the Milky Way subgroup, which is part of the local galaxy cluster, the Local Group.. There are 61 small galaxies confirmed to be within 420 kiloparsecs (1.4 million light-years) of the Milky Way, but not all of them are necessarily in orbit, and some may themselves be in orbit of other satellite galaxies.