Astronomers have watched stars orbit in the gravitational pull of the supermassive black hole at our galaxy's heart, and have found
distant galaxies far beyond our own.
The best way to work out where the dark matter lies is through gravitational lensing — the distortion of the Universe's fabric by gravity, which deflects the light coming from
distant galaxies far beyond the dark matter.
Not exact matches
It would be otiose to give examples: a
distant thunder is in the past as much as a
distant star; but no matter how
far in time - space a star or
galaxy is, it is always faintly immanent in my Here - Now even when its action is below the threshold of human perception; its action can be made visible by a combination of lenses or a prolonged photographic exposure.
Astronomers exploit this property of space to use the clusters as a zoom lens to magnify the images of
far - more -
distant galaxies that otherwise would be too faint to be seen.
Along with the familiar cosmic microwave background — the afterglow of the big bang — the
distant universe is suffused with an infrared background, thought to come from
galaxies and stars too faint and
far away to see.
Because parallax measurements are so difficult to obtain for
far -
distant star - forming regions on the other side of the
galaxy, astronomers widely agree they will chiefly serve as important calibration points to augment existing kinematic distance measurements.
A simulation suggests that the gravity of hidden dark matter dictates the orbits of stars after
galaxies collide, including stars flung
far into space on
distant, slow - moving orbits (right panel).
To locate the source, a group directed by Puget and David L. Clements in Paris has started the first
far - infrared search for
distant galaxies, using the European Space Agency's Infrared Space Observatory (ISO).
Sometimes credit didn't come because, as
far as we know, he was wrong: his idea that «tired light» and not an expansion of the universe might be the cause of the lengthening of wavelengths from
distant galaxies, or his insistence that
galaxy clusters didn't belong to superclusters.
Peering into the
far reaches of the universe, astronomers have spotted seven
galaxies so
distant that they appear as they did less than 600 million years after the Big Bang.
A
distant, ancient
galaxy far more massive than our own formed all its stars in less than half a billion years
The team made a 3 - D map by collecting light from over 70,000
galaxies, peering all the way into the
distant universe, and by using this light to measure how
far these
galaxies are from our own Milky Way.
«Follow - up spectroscopic observations are now needed to verify that the object is
far more
distant than the lensing
galaxy, as well as to derive better distance estimates to confirm that multiple images really belong to the same object,» says Ratnatunga.
Researchers estimated the rate of star formation by measuring
far - infrared wavelengths of light emanating from the
distant galaxy.
However, through the phenomenon known as «gravitational lensing,» a massive, foreground cluster of
galaxies acts as a natural «zoom lens» in space by magnifying and stretching images of
far more
distant background
galaxies.
When he examined
galaxies in the
distant early universe, astronomer Roberto Abraham of the University of Toronto found they were
far more mature than expected.
The objects causing these low - frequency ripples — such as orbiting supermassive black holes at the centers of
distant galaxies — would be different from the higher frequency ripples, emitted by collisions of much smaller black holes, that have so
far been detected on Earth.
Acting as a «natural telescope» in space, the gravity of the extremely massive foreground
galaxy cluster MACS J2129 - 0741 magnifies, brightens, and distorts the
far -
distant background
galaxy MACS2129 - 1, shown in the top box.
The study led by Donahue looked at
far - ultraviolet light from a variety of massive elliptical
galaxies found in the Cluster Lensing And Supernova Survey with Hubble (CLASH), which contains elliptical
galaxies in the
distant universe.
Lead researcher Dr David Clements, from the Department of Physics at Imperial College London, explains: «Although we're able to see individual
galaxies that go
further back in time, up to now, the most
distant clusters found by astronomers date back to when the universe was 4.5 billion years old.
Fast radio bursts are brief, bright pulses of radio emission from
distant but so
far unknown sources, and FRB 121102 is the only one known to repeat: more than 200 high - energy bursts have been observed coming from this source, which is located in a dwarf
galaxy about 3 billion light years from Earth.
The source was traced to a
distant galaxy, so
far away that its light took around 3.9 billion years to reach Earth.
The Atacama Large Millimeter / Submillimeter Array (ALMA), a massive observatory now under construction five kilometers above sea level in Chile, should
further illuminate the workings of
distant galaxies when it opens for scientific use in 2011.
The
farther we peer into space, the more we realize that the nature of the universe can not be understood fully by inspecting spiral
galaxies or watching
distant supernovas.
That number is
far higher than scientists would expect to see shooting toward Earth from
distant reaches of the
galaxy.
It is seen passing a much more
distant spiral
galaxy, called NGC 3726, which is about 55 million light - years from Earth, or 2 trillion times
farther away than the comet.
Gwen Rudie studies the chemical and physical properties of very
distant galaxies and their surrounding gas in order to
further our understanding of the processes that are central to the formation and development of
galaxies.
With your support, Keck Observatory astronomers will continue to push the frontiers of exploration, discovering new worlds, probing the mysteries of the Milky Way, and measuring
distant galaxies and other cosmic phenomenon to
further understand the nature of the Universe and our place in it.
In addition, the gravitational lensing of quasars by
distant galaxies is only possible if the lensed quasars are
farther away than the
galaxy bending the quasar's light.
That means that if we were on those
far distant galaxies — right this second — looking at Earth with a powerful telescope, we'd be watching the dinosaurs trample around our planet.
«The more
distant the
galaxy, the
further back one is looking, so by measuring their distances we can piece together a timeline of how vigorously the Universe was making new stars at different stages of its 13.7 billion year life,» said Joaquin Vieira (California Institute of Technology, USA), lead author of the paper in the journal Nature.
«The more
distant the
galaxy, the
further back one is looking, so by measuring their distances we can piece together a timeline of how vigorously the Universe was making new stars at different stages of its 13.7 billion year life,» said lead author Joaquin Vieira of the California Institute of Technology.
Then, by unveiling the nature of CR7 piece by piece, we understood that not only had we found by
far the most luminous
distant galaxy, but also started to realize that it had every single characteristic expected of Population III stars.
Therefore, the more
distant galaxies did not have as much time to rotate and twist their arms, so the
farther galaxies should have less twist.
Eight bright X-ray sources located
far beyond the
galaxy at distances of hundreds of millions of light - years were observed with Chandra, which revealed that the X-rays from these
distant sources are absorbed selectively by oxygen ions in the vicinity of our
galaxy.
The image, which shows gas, dust and stars spread across the sky in a disorderly and irregular jumble, also reveals several other,
far more
distant galaxies that appear as fuzzy shapes in the background.
The beams that would have to be regularly targeted at the craft could, the theory goes, move
far beyond and reach Earth intermittently as FRBs, disrupted by the movement of
distant galaxies and planets.
Webb's sharp and powerful infrared vision will allow it to peer
farther into the Milky Way with greater clarity than infrared telescopes before it — uncovering parts of the
galaxy that were once too dim, too
distant, or too concealed to study.
They were surprised to find that many of these
distant dusty star - forming
galaxies are even
further away than expected.
The GBT routinely pairs with this spacefaring radio telescope, that travels nearly as
far from Earth as the Moon, to watch supermassive black holes in the hearts of
distant galaxies.
Most of these have been found to precede large Type - II supernovas of massive stars (sometimes called «hypernova») in star - forming regions within
distant galaxies, which is logical since massive stars live such short lives that they don't have time to move
far from their birthplace.
That
far back, it would be so
distant that the light we're seeing from it would have started traveling away from the
galaxy when the universe was just a quarter of its current age.
While probing space in depth — let us bear in mind that the
further we look, the more we go back in time — ALMA detects the glow of tepid dust present in the most
distant galaxies, i.e., the earliest ones, with better resolution than could be possible in the deepest observations using visible or infrared light.
Its scientific impact will spread from studies of star formation within our own Milky Way, to probing
distant galaxies in the
furthest reaches of the Universe.
On the left is NGC 2419, it is a large but very
distant globular cluster lying
far beyond the edge of the
galaxy.
As Webb observes light that's traveled from the
far reaches of the cosmos, it captures images of
distant stars and forming
galaxies as they were in the earliest stages of the universe.
Light that is emitted or reflected by objects takes time to travel, and the vast distances it must cross to reach us from the
farthest parts of the universe means that we see the most
distant galaxies as they were billions of years ago.
A new analysis of
galaxy colors, however, indicates that the
farthest objects in the deep fields must be extremely intense, unexpectedly bright knots of blue - white, hot newborn stars embedded in primordial proto -
galaxies that are too faint to be seen even by Hubble's
far vision — as if only the lights on a
distant Christmas tree were seen and so one must infer the presence of the whole tree (more discussion at: STScI; and Lanzetta et al, 2002).
Microquasars In
far -
distant quasars and active
galaxies, millions or even billions of light - years away, the gravitational and magnetic energy of supermassive black holes is capable of accelerating «jets» of subatomic particles to speeds approaching that of light.
LUVOIR would be able to see more
galaxies that are not only
farther away but also
farther into our
galaxy — the Milky Way — including
distant stars, exoplanets, intergalactic gas, and the imprints of dark matter.