For this reason, he says, the density of the universe always remains the same even though the galaxies are zooming away in all directions.

For new galaxies to be created, Professor Bondi declares, it would only be necessary for a single hydrogen atom to be created in an area the size of your living room once every few million years.

For instance, galaxies contain more young stars and are less clustered, and quasars appear more numerous.

For comparison, the diameter of a typical galaxy is only 30, 000 light-years, and the typical distance between two neighboring galaxies is only 3 million light-years.

For example, spiral galaxies whose appearance is intermediate between two of the above classes are often identified by appending 2 lower-case letters to the main galaxy type ( for example56 Sbc for a galaxy that is intermediate between an Sb and an Sc ).

For example, large voids in the distributions of galaxies are believed by many cosmologists to have originated in quantum fluctuations during the big bang.

For observing smaller star clusters, nebulae and galaxies binocular magnification is an important factors for visibility because these objects appear tiny at typical binocular magnifications.

For example, you could choose a coordinate system in which the galaxies are equally spaced out and don't have length contraction, in which case the Universe could be said to be infinite in size.

For example, the original discovery that far galaxies appeared to have higher spectral redshifts than near galaxies ( an apparent violation of homogeneity ) led to the discovery of Hubble flow, the metric expansion of space that occurs equally in all locations ( restoring homogeneity ).

For example, the current Big Bang model of the Universe suggests that it is 13. 7 billion years ( 4. 3 × 10 < sup > 17 </ sup > seconds ) old, and that the observable universe is 93 billion light years across ( 8. 8 × 10 < sup > 26 </ sup > metres ), and contains about 5 × 10 < sup > 22 </ sup > stars, organized into around 125 billion ( 1. 25 × 10 < sup > 11 </ sup >) galaxies, according to Hubble Space Telescope observations.

For example, our own Milky Way galaxy is known to be " ingesting " a couple of small galaxies right now.

For a given distance, the two-point autocorrelation function is a function of one variable ( distance ) which describes the probability that two galaxies are separated by this particular distance.

For example, a rough criterion for distinguishing between lenticular and elliptical galaxies is that elliptical galaxies have v / σ < 0. 5 for ε = 0. 3.

For distant galaxies and AGNs observations are made of the overall shape and properties of the galaxy, as well as the groupings where they are found.

For example, in a static universe with tired light mechanisms, the surface brightness of stars and galaxies should be constant, that is, the farther an object is, the less light we receive, but its apparent area diminishes as well, so the light received divided by the apparent area should be constant.

: For SB0 barred lenticulars, classify in: Category: Barred lenticular galaxies.

: For SA0 unbarred lenticulars, classify in: Category: Unbarred lenticular galaxies.

For comparison, there were observed to be around 38 dwarf galaxies in the Local Group, and only around 11 orbiting the Milky Way, ( for a detailed and more up to date list see Milky Way's satellite galaxies ) yet one dark matter simulation predicted around 500 Milky Way dwarf satellites.

: For lenticular galaxies classified as SA0 see: Category: Unbarred lenticular galaxies.

For example, astronomers frequently select galaxies from B-band catalogs, which are the most complete, and use these B band magnitudes, but the distances for the galaxies are calculated using the Tully-Fisher relation and the H band.

For everyone involved knew that the whole valley was a powder keg, and Mitchell Barton the fuse which could send it into explosive violence.

For lawyers, reflecting perhaps their parochial preferences, there has been a special fascination since then in the role played by the Supreme Court in that transformation -- the manner in which its decisions altered in `` the switch in time that saved nine '', President Roosevelt's ill-starred but in effect victorious `` Court-packing plan '', the imprimatur of judicial approval that was finally placed upon social legislation.

For better or for worse, we all now live in welfare states, the organizing principle of which is collective responsibility for individual well-being.

For the family is the simplest example of just such a unit, composed of people, which gives us both some immunity from, and a way of dealing with, other people.

For Plato, `` imitation '' is twice removed from reality, being a poor copy of physical appearance, which in itself is a poor copy of ideal essence.

For the occasion on which everyone already knows everyone else and the host wishes them to meet one or a few honored newcomers, then the `` open house '' system is advantageous because the honored guests are fixed connective points and the drifting guests make and break connections at the door.

For the tone of the editorials which greeted Mr. Eisenhower's original announcement of his running had been strangely disquieting.

William Wimsatt and Cleanth Brooks, it seems to me, have a penetrating insight into the way in which this control is effected: `` For if we say poetry is to talk of beauty and love ( and yet not aim at exciting erotic emotion or even an emotion of Platonic esteem ) and if it is to talk of anger and murder ( and yet not aim at arousing anger and indignation ) -- then it may be that the poetic way of dealing with these emotions will not be any kind of intensification, compounding, or magnification, or any direct assault upon the affections at all.

For there is also the `` face of reality '' in the form of the individual's perceptions of his own abilities and interests, of the objective possibilities open to him, of the familial and other social pressures to which he is exposed.

For it is their catastrophic concept of the Anglo-Saxon invasions rather than Kemble's gradualist approach which dominates the field.

For example, even the most successful executive lives in a two-room apartment while ordinary people rent space in the stairwells of office buildings in which to sleep at night ; ;

For a dawning sense of illumination occurs in consequence of two events which, as so often in Malraux, suddenly confront a character with the existential question of the nature and value of human life.

For a particularly fabulous room which houses a collection of fine English Chippendale furniture, fabric wall panels were embroidered with a typically Chinese-inspired design of this revered Eighteenth Century period.

For some compulsive reason which would have fascinated Dr. Freud, Communists of all shapes and sizes almost invariably impute to others the very motives which they harbor themselves.

For something, clearly, has gone very, very seriously wrong in Soviet-Chinese relations, which were never easy, and have now deteriorated.

For those communities which have financial difficulties in effecting adjustments, there are a number of alternatives any one of which alone, or in combination with others, would minimize if not even eliminate the problem.

For the States which maintain two separate agencies -- one for the vocational rehabilitation of the blind, and one for the rehabilitation of persons other than the blind -- the Act specifies that their minimum ( base ) allotment shall be divided between the two agencies in the same proportion as it was divided in fiscal year 1954.

For he knows that the first and sometimes most difficult job is to know what the question is -- that when it is accurately identified it sometimes answers itself, and that the way in which it is posed frequently shapes the answer.

For, if so, the path leads through a complex process of parliamentary diplomacy which adds still another dimension to the problem.

For proper accreditation of schools, teachers in any course must have a degree at least one level above that for which the student is a candidate.

For the last two years, this frontier of the arts has produced a number of so-called `` non-dramas '' which have left indelible, bittersweet impressions on the psyche of this veteran theatregoer.

( 3 ) For anionics, these micelles appear to be roughly spherical assemblages in which the hydrocarbon tails come together so that the polar groups ( the ionized ends ) face outward towards the aqueous continuous phase.

For protein identification, fractions from the column were concentrated by pervaporation against a stream of air at 5-degrees-C or by negative pressure dialysis in an apparatus which permitted simultaneous concentration of the protein and dialysis against isotonic saline.