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.
«Not only did we detect radio signals emitted by
distant galaxies when the Universe was three billion years younger, but their gas reservoirs turned out to be unexpectedly large, about 10 times larger than the mass of hydrogen in our Milky Way.
Emitted in
a distant galaxy when multicellular life was just beginning to populate Earth, the waves traveled at the speed of light for more than a billion years to at last wash over our planet last September, taking just seven milliseconds to traverse the distance between LIGO's twin listening stations in Louisiana and Washington State.
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.
When observing a
distant galaxy, for example, massive objects between Earth and the
galaxy act like a giant lens and bend the
galaxy's light, creating multiple images of the single
galaxy.
When dark matter lies between us and a
distant galaxy, the light of the
galaxy can be warped by the gravity from the dark matter.
When we measure the forces between
distant galaxies more accurately, will we find deviations from Newton's laws, as Milgrom suggests?
GALACTIC QUARTET The way invisible dark matter warped the light from
distant galaxies, shown here as the swirl of material surrounding four giant
galaxies in cluster Abell 3827 (seen in this Hubble Space Telescope photograph), suggested that dark matter can separate from stars
when galaxies collide.
When the astronomers looked at several
distant galaxies using the New Technology Telescope at the European Southern Observatory in Chile and two telescopes at the Siding Spring Observatory in New South Wales, they found that their observations tied in exactly with Dopita's predictions.
But around the same time studies of very
distant galaxies, which we see as they were
when the Universe was very young, were setting constraints on the amount of baryonic matter in the Universe (New Scientist, Science, 30 April).
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 surface, a sweeping parabola of Euclidean purity, seems perfectly matched to its function: to peer from a tiny speck in the universe called Earth into an unimaginably
distant past
when vast
galaxies were still forming.
When you see Jupiter shining in the night sky, for example, you're looking about an hour back in time, whereas the light from
distant galaxies captured by telescopes today was emitted millions of years ago.
The
distant galaxy, known as SDP.81, forged the equivalent of 315 of our suns each year in an era
when star formation was at its maximum in the universe.
The CIB glow is more irregular than can be explained by
distant unresolved
galaxies, and this excess structure is thought to be light emitted
when the universe was less than a billion years old.
Observations of the
galaxies» spectra suggest they are very
distant, appearing as they were
when the universe was just 2 to 4 billion years old, less than a third its present age.
When it takes to the skies in 2001, it will train an infrared eye on interstellar clouds, the center of the Milky Way, planets in the solar system and
distant galaxies — many of the same things that sirtf will look at a few years hence.
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.
Much as a teacher would be amazed to enter a preschool classroom full of college - age students, astronomers were thrown for a loop
when they found fully formed
galaxies in a
distant corner of the universe they thought was populated with relatively small, ragged gatherings of stars.
Gravitational lenses form
when an intervening massive object, like a
galaxy or
galaxy cluster, bends the light from more
distant galaxies.
The puzzle first emerged
when Rudnick, who had decided to study a large cold spot in the cosmic microwave background, found some strange data in a radio telescope survey of
distant galaxies.
Only
when we look at
galaxies billions of light - years away, collecting the light they emitted billions of years ago, can we see that the most
distant galaxies are moving more slowly than we would expect from observations of nearby
galaxies, an indication that the universe has since sped up.
But a few years later,
when Edwin Hubble's analysis of light from
distant galaxies confirmed the universe's expansion, Einstein gave in.
They looked at 140,000
distant quasars, luminous regions in the center of massive
galaxies,
when the universe was only one - quarter of its present age.
When some of those curves are projected back in time, the speed of light becomes so fast that light from
distant galaxies conceivably could have reached Earth in several thousand years.
When a very massive
galaxy comes smack in between Earth and a
distant galaxy, the light from the
distant galaxy is bent around the huge impediment.
«Using the Hubble Space telescope, astronomers have detected light from the most
distant object yet found — a fledgling
galaxy that existed
when the Universe was just over 420 million years old.»
When conditions are just right, space can magically turn into a sort of magnifying glass, making even incredibly
distant galaxies suddenly visible from here in the Milky Way.
In fact, two of these
galaxies are the most
distant of their kind ever seen — so
distant that their light began its journey
when the Universe was only one billion years old.
Measurements of extremely
distant gas halos and
galaxies indicate the baryonic matter present
when the universe was only a few billion years old represented about one - sixth the mass and density of the existing unobservable, or dark, matter.
That's
when a Swiss astronomer named Fritz Zwicky determined the speed at which a
distant cluster of
galaxies revolved was an indication that they contained much more mass than observable light from them suggested.
According to new Hubble Space Telescope observations of our Milky Way's siblings, which existed long ago, the night sky must have looked much emptier in the
distant past,
when our
galaxy was still under construction.
At the same time, the lensing efficiency becomes most prominent
when the lens is located directly between the
distant galaxy and the observer.
This has made it virtually impossible to detect, except for its effects
when it exerts a gravitational tug or
when it warps the light of
distant galaxies in what is called gravitational lensing.
Although the emission frequency of the more
distant objects becomes lower due to the expansion of the universe, the ALMA Telescope is designed to receive millimeter waves in a frequency range lower than submillimeter waves observed this time, which means this identification method can be applied to objects even 10 billion light years away and will be a competent observation method in the ALMA Era
when there will be a dramatic advancement in the research of
distant galaxies.
EGSY8p7 is the most
distant confirmed
galaxy whose spectrum obtained with the W. M. Keck Observatory places it at a redshift of 8.68 at a time
when the Universe was less than 600 million years old.
Two of these
galaxies are the most
distant of their kind ever seen — so
distant that their light began its journey
when the Universe was only one billion years old.
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.
When American astronomer Edwin Hubble established the extragalactic nature of what we now call
galaxies, it became plain that the Clouds had to be separate systems, both of the irregular class and more than 100,000 light - years
distant.
Astronomers studying the
distant universe have found that small star - forming
galaxies were abundant
when the universe was only 800 million years old, a few percent of its present age.
These
distant quasars are thought to «turn on»
when the host
galaxy's central black hole is «fueled» by material drawn in during an early stage of the
galaxy's development, before the
galaxy «settles down» to a more sedate life.
Knowing the abundance of oxygen in the
galaxy called COSMOS - 1908 is an important stepping stone toward allowing astronomers to better understand the population of faint,
distant galaxies observed
when the Universe was only a few billion years old, Shapley said.
MAUNAKEA, Hawaii — The international University of California, Riverside - led SpARCS collaboration has discovered four of the most
distant clusters of
galaxies ever found, as they appeared
when the... Read more»
They are some of the most
distant objects discovered in the observable universe, making them key to understanding the formation of the cosmos we inhabit — especially the early stages
when the first stars and
galaxies burst into existence.
Less dramatically,
when Spitzer's coolant ran out, scientists were able to continue using tools in the telescope's infrared array camera to keep looking for objects like asteroids, dusty stars and
distant galaxies.
Each observatory has a fixed gaze on a group of
distant «
galaxies» — really more like solar systems — and
when Mario enters the observatory, he chooses the
galaxy to which he wants to travel.
In contrast, we can not perform controlled, repeatable experiments in stellar evolution, and
when we observe the most
distant galaxies we are looking at them not as they are now but as they existed roughly 13 billion years ago.