The face-on spiral galaxy is experiencing abnormally high rates of star formation, indicating that it is interacting with one or both members of the group.

The current fixed-lines outside Bangui are transmitted through a DOMSAT network installed in the early 1990s as a star formation around the Bangui satellite earth station ( 1 Intelsat ).

It is passing behind M51 and may be the cause of the larger galaxy's prodigious star formation.

For more massive stars, electron degeneracy pressure will not keep the iron core from collapsing to very great density, leading to formation of a neutron star, black hole, or, speculatively, a quark star.

N44F also features dust columns with probable star formation hidden inside.

: R < sup >*</ sup > = the average rate of star formation per year in our galaxy

One can question why the number of civilizations should be proportional to the star formation rate, though this makes technical sense.

The alternate formulation, in terms of the number of stars in the galaxy, is easier to explain and understand, but implicitly assumes the star formation rate is constant over the life of the galaxy.

The number of stars in the galaxy now, N < sup >*</ sup >, is related to the star formation rate R < sup >*</ sup > by

Its bar is a center of star formation and shows extensions of the spiral arms ' dust lanes.

The speculative equation factors in: the rate of star formation in the galaxy ; the fraction of stars with planets and the number per star that are habitable ; the fraction of those planets which develop life, the fraction of intelligent life, and the further fraction of detectable technological intelligent life ; and finally the length of time such civilizations are detectable.

Diffuse gas clouds, however, readily collide to produce shocks which in turn stimulate bursts of star formation.

Such interactions between nearby galaxies, which may ultimately result in a merging, sometimes induce significantly increased incidents of star formation leading to starburst galaxies.

Since the Hubble sequence is entirely based upon visual morphological type, it may miss certain important characteristics of galaxies such as star formation rate ( in starburst galaxies ) and activity in the core ( in active galaxies ).

Consequently these galaxies also have a low portion of open clusters and a reduced rate of new star formation.

The stars contain low abundances of heavy elements because star formation ceases after the initial burst.

The arms are visible because the high density facilitates star formation, and therefore they harbor many bright and young stars.

This can trigger bursts of star formation as the interstellar medium becomes disrupted and compressed.

Messier 82 | M82, the archetype starburst galaxy, has experienced a 10-fold increase in star formation rate as compared to a " normal " galaxy.

During this early epoch, galaxies undergo a major burst of star formation.

Most bright galaxies have remained fundamentally unchanged for the last few billion years, and the net rate of star formation probably also peaked approximately ten billion years ago.

At present, most star formation occurs in smaller galaxies where cool gas is not so depleted.

The supply of star-forming material is finite ; once stars have converted the available supply of hydrogen into heavier elements, new star formation will come to an end.

By a process known as self-attribution, it has been shown in numerous studies that individuals with knowledge of astrology tend to describe their personality in terms of traits compatible with their star sign.

The main sequence is sometimes divided into upper and lower parts, based on the dominant process that a star uses to generate energy.

Once nuclear fusion of hydrogen becomes the dominant energy production process and the excess energy gained from gravitational contraction has been lost, the star lies along a curve on the Hertzsprung-Russell diagram ( or HR diagram ) called the standard main sequence.

In astrophysics, mass transfer is the process by which matter gravitationally bound to a body, usually a star, fills its Roche lobe and becomes gravitationally bound to a second body, usually a compact object ( white dwarf, neutron star or black hole ), and is eventually accreted onto it.

Though it is currently stable, Barnard 68 will eventually collapse, inciting the process of star formation.

As only 30 to 40 per cent of the gas in the cloud core forms stars, the process of residual gas expulsion is highly damaging to the star formation process.

< sup > 23 </ sup > Na is created in the carbon-burning process by fusing two carbon atoms together ; this requires temperatures above 600 megakelvins and a star with at least three solar masses.

By most accounts, the low-budget film shot on location in Arizona was a learning process for Peckinpah, who feuded with Fitzsimons ( brother of the film's star Maureen O ' Hara ) over the screenplay and staging of the scenes.

Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime.

This process causes the star to gradually grow in size, passing through the subgiant stage until it reaches the red giant phase.

It consists of two large spiral galaxies in the process of colliding with their nuclei orbiting at a distance of 1, 200 light-years, causing extensive star formation throughout both components.

White dwarfs are thought to be the final evolutionary state of all stars whose mass is not high enough to become a neutron star — over 97 % of the stars in our galaxy .< sup >, § 1 .</ sup > After the hydrogen – fusing lifetime of a main-sequence star of low or medium mass ends, it will expand to a red giant which fuses helium to carbon and oxygen in its core by the triple-alpha process.

A carbon-oxygen white dwarf that approaches this mass limit, typically by mass transfer from a companion star, may explode as a Type Ia supernova via a process known as carbon detonation.

Some lighter stars also form these elements in the outer parts of the stars over long periods of time, by absorbing energy from fusion in the inside of the star, by absorbing neutrons that are emitted from the fusion process.

Sinatra gained the role, ultimately taking a pay cut in the process ( earning $ 8, 000, a huge drop from his $ 130, 000 salary for Anchors Aweigh ) to star in the film.

As a branch of astronomy star formation includes the study of the interstellar medium and giant molecular clouds ( GMC ) as precursors to the star formation process and the study of young stellar objects and planet formation as its immediate products.

When the surrounding gas and dust envelope disperses and accretion process stops, the star is considered a pre – main sequence star ( PMS star ).

In high mass stars, the length of the star formation process is comparable to the other timescales of their evolution, much shorter, and the process is not so well defined.