Many had expected to see big, fuzzy clouds of stars, which presumably contracted to
form big galaxies such as the Milky Way.
Hierarchical Formation Creation of large structures from many smaller ones; a likely mechanism for
forming big galaxies.
Not exact matches
The «Let there be light» easily could reference the
Big Bang, then out of the void etc is the
galaxies and planets
forming.
Following the
big bang, if the expansion of space had overwhelmed the pull of gravity in the newborn universe, stars,
galaxies and humans would never have
formed
These gas - filled limbs are often where new stars
form, and can constrain how
big a
galaxy's central black hole grows.
About 500 million years after the
Big Bang, one of the first
galaxies in the universe
formed, containing stars of about the same mass as the sun — which can live for 10 billion years — as well as lighter stars.
Among the
galaxies are hundreds of tiny, ill -
formed blotches of stars that should help astronomers devise a coherent picture of how
galaxies assembled after the
big bang, says project leader Steven Beckwith, director of the Space Telescope Science Institute (STScI) in Baltimore, Maryland.
Dekel and coworkers scrutinized the mergers between
big spiral
galaxies that probably
form elliptical
galaxies.
A large fraction of the massive
galaxies [3] we now see around us in the nearby Universe were already
formed just three billion years after the
Big Bang.
Previously, the oldest light gathered by telescopes emanated from
galaxies formed a few billion years after the
Big Bang.
Lee thinks the
galaxy probably
formed not from the cataclysmic collapse of one
big gas cloud but from the mergers of many smaller ones.
In fact, production rates have steadily declined from a maximally productive period between 3 and 6 billion years after the
Big Bang, when
galaxies formed about 10 times as many stars (going by the total mass of the stars created) each year than today.
These clusters are so massive they warp the surrounding space,
forming gigantic «gravitational lenses» that amplify the faint light from
galaxies even farther away, ones born less than a billion years after the
big bang.
This 13 - billion - year - old
galaxy (circled in this image from Hubble)
formed 700 million years after the
Big Bang, but its light is just now reaching us.
«The
big surprise is that we're finding too many massive
galaxies that
formed too early,» says team member Patrick McCarthy of the Carnegie Observatories in Pasadena, California.
Initially some researchers proposed that this light came from the very first
galaxies to
form and ignite stars after the
Big Bang.
The
galaxies, which are
forming stars very rapidly, are
big for their age, meaning that astronomers might have to rethink current ideas about
galaxy formation.
Now astronomers have spotted five
galaxies at least as
big as the Milky Way that existed 12 billion years ago, or just a little more than a billion years after the first stars
formed.
Some of these
galaxies formed just 600 million years after the
Big Bang and are fainter than any other
galaxy yet uncovered by Hubble.
Galaxies are thought to form inside clouds of dark matter, and the properties of whatever makes up this dark matter would have determined when it first clumped into clouds and how big they were, enabling the first galaxies
Galaxies are thought to
form inside clouds of dark matter, and the properties of whatever makes up this dark matter would have determined when it first clumped into clouds and how
big they were, enabling the first
galaxies galaxies to
form.
A new study shows that
galaxies present just a few billion years after the
big bang had much more star -
forming material, in the
form of molecular gas, to draw on.
Probing the edge of the fog bank should help explain how quasars and
galaxies managed to
form soon after the tumult of the
Big Bang.
«This study transforms our understanding of how
galaxies formed from the
Big Bang,» said Faucher - Giguère, a co-author of the study and assistant professor of physics and astronomy in the Weinberg College of Arts and Sciences.
FARTHEST
GALAXY This 13 - billion - year - old galaxy (circled in this image from Hubble) formed 700 million years after the Big Bang, but its light is just now reachi
GALAXY This 13 - billion - year - old
galaxy (circled in this image from Hubble) formed 700 million years after the Big Bang, but its light is just now reachi
galaxy (circled in this image from Hubble)
formed 700 million years after the
Big Bang, but its light is just now reaching us.
BIGGEST PILEUP Massive
galaxies like ours usually
form when smaller
galaxies collide.
Quasars are the discs of hot gas that
form around supermassive black holes at the centre of massive
galaxies — they are
bigger than Earth's orbit around the sun and hotter than the surface of the sun, generating enough light to be seen across the observable universe.
Astronomers know that the first
galaxies during their
forming stages were chemically simple — primarily made up of hydrogen and helium, elements made in the
Big Bang during the first three minutes of the universe's existence.
Ghost - like particles that were first created in the instant following the
Big Bang, antineutrinos and their partner neutrinos travel at close to the speed of light and are notoriously difficult to observe as they move through space, passing through planets, star systems, and
galaxies with scant interactions with other
forms of matter.
«Because of its extremely low oxygen level, this
galaxy serves as an accessible proxy for star -
forming galaxies that came together within one to two billion years after the
Big Bang, the early period of our nearly 14 billion - year - old universe.»
Pasadena, CA — Using information gathered from several telescopes, a team of astronomers, including Carnegie's Eric Murphy, searched the sky for very rarely seen dusty starburst
galaxies,
formed soon after the
Big Bang.
The
big bang theory can not explain how such distant and massive
galaxy concentrations could have
formed so quickly that their light had over 13.0 - billion years to travel to planet Earth.5, 52, 53
Had the universe been slightly denser by one part in 1062, the expansion would have slowed and collapsed back on itself in a «
big crunch» after 13.7 billion years (today's age of the universe according to the
big bang theory).60 Had the universe been slightly less dense by one part in 1062, «the universe would have expanded «so quickly and become so sparse it would soon seem essentially empty, and gravity would not be strong enough by comparison to cause matter to collapse and
form galaxies.61 The stretching explanation does not have this problem.
Fundamentally, it seems to indicate that in the
galaxies (or at least in this
galaxy) that
formed relatively shortly after the
Big Bang, the onset of star formation and related element production was very rapid.»
Two of the
galaxies are at a redshift of 5.7, which means they
formed stars 1 billion years after the
Big Bang.
Here's the problem for those who believe a
big bang preceded the formation of black holes, stars, and
galaxies: black holes are too small to affect something as huge as a
galaxy that
formed long after the universe expanded, and there is no reason a
galaxy should
form a large central black hole.
The oldest
galaxies at the end of the universe were
formed 600 million years after the
Big Bang.
Hubble's latest discovery of 250 faint
galaxies —
formed 600 million to 900 million years after the
Big Bang — in the early universe using three
galaxy clusters to magnify the light given off by these distant objects.
The
galaxies in this region are among the oldest ever discovered, having
formed only a few hundred million years after the
Big Bang.
The research may solve the long - standing puzzle of how supermassive black holes were
formed in the centers of some
galaxies less then a billion years after the
Big Bang.
In the first several hundred million years after the
Big Bang, the Universe was too hot for stars and
galaxies to
form.
These deep fields have given astronomers unprecedented access to understanding how
galaxies form and develop over billions of years in the history of our universe, from shortly after the
Big Bang to today.
The team found typical
galaxies forming stars in the Universe two billion years after the
Big Bang have only twenty percent of metals (elements heavier than Helium) compared with those in the present day Universe.
In 2003, astronomers announced that they had discovered that iron from supernovae of the first stars (possibly from Type Ia supernovae involving white dwarfs) indicate that «massive chemically enriched
galaxies formed» within one billion years after the
Big Bang, and so the first stars may have preceded the birth of supermassive black holes (more from Astronomy Picture of the Day, ESA, and Freudling et al, 2003).
Examples of science projects enabled by the data in the High - Latitude Survey include: mapping the formation of cosmic structure in the first billion years after the
Big Bang via the detection and characterization of over 10,000
galaxies at z > 8; finding over 2,000 QSOs at z > 7; quantifying the distribution of dark matter on intermediate and large scales through lensing in clusters and in the field; identifying the most extreme star -
forming galaxies and shock - dominated systems at 1 < z < 2; carrying out a complete census of star -
forming galaxies and the faint end of the QSO luminosity function at z ~ 2, including their contribution to the ionizing radiation; and determining the kinematics of stellar streams in the Local Group through proper motions.
Because some
galaxies are billions of light years away from us, we can discern that they
formed fairly soon after the
big bang (as you look deeper into space, you see further back in time).
For gravity to clump
galaxies together into walls or filaments, there must be large amounts of mass left over from the
big bang, particularly unseen mass in the
form of dark matter.
The MOSDEF team uses the MOSFIRE spectrometer on the the W. M. Keck Observatory telescopes to obtain spectra for many
galaxies that are located at 1.5 to 4.5 billion years after the
Big Bang, the interval in which the universe
formed the highest amount of stars in its history.
The halos around quasars — the brightest and the most active objects in the universe, they are
galaxies formed less than 2 billion years after the
Big Bang; they have supermassive black holes in their centers and consume stars, gas, interstellar dust and other material at a very fast rate — are made of gas known as the intergalactic medium and extend for up to 300,000 light - years from the centers of the quasars.
Black holes that
form due to the collapse of massive stars typically have masses 5 - 20 times that of the sun, but supermassive black holes — found in the centers of nearly all known sizeable
galaxies — are far
bigger, at about hundreds of thousands, or even billions, of solar masses.
It may be a small cluster of stars that was typical of the time just after the
Big Bang that eventually merged with other clusters to
form the familiar
galaxies of today.