I suspect that they emerge at various points in the Galactic disc.

On the other hand, less massive stars live longer and thus are found throughout the galactic disc, including in between the spiral arms.

During the following two billion years, the accumulated matter settles into a galactic disc.

The galactic disc is mainly composed of gas, dust and stars.

Or they might wrap up the Galactic disc in a shell to trap all its radiant energy.

There were no stable niches in the galactic disc.

Distances like this are typical inside galactic discs, including in the vicinity of the solar system.

As the gas cools, it is pulled back into the galactic disc of the galaxy by gravitational forces.

Evidence shows that the Sun passed through the plane bisecting the galactic disc only three million years ago and is now moving farther above it.

It illuminated the nearby stars for perhaps an eighth of the galactic disc around it.

The first Einstein ring corresponds to the most distorted region of the picture and is clearly depicted by the galactic disc.

The second is an oscillatory bobbing motion, similar to a floating buoy, which will periodically take the sun through the galactic disc.

The galactic disc is the plane in which the spirals, bars and discs of disc galaxies exist.

When the Sun's orbit takes it outside the galactic plane which bisects the galactic disc, the influence of the galactic tide is weaker.

"About ..." said Slartibartfast, "about two thirds of the way across the Galactic disc, I would say, roughly.

First noticed in 1991, it is thought to be a cannonball star, shot out of a star cluster and now moving rapidly through space directly away from the galactic disc.

The now-variegated Lokaron species was pushing outward in all directions, filling a sphere of space that was now becoming oblate as its top and bottom came up against the limits of the galactic disc.

The stars and gas that comprise the tails will have been pulled from the easily distorted galactic discs (or other extremities) of one or both bodies, rather than the gravitationally bound galactic centres.

Of particular significance was the detection of a single particle whose energy of 10 electron volts is larger than the maximum that could be contained in the galactic disc by galactic magnetic fields.

In 2006, a study using 2MASS data cast doubts on the nature of the "Ring", arguing that the data suggests that the ring is actually part of the warped galactic disc of the Milky Way.

However, observations using the Anglo-Australian Telescope published in 2007 suggest that a warped disc cannot create the observed structure, which must therefore be formed either by a flare of the Galactic disc or have an extra-Galactic origin.

The maximum energy of a particle recorded by Aggasiz experiment, 10 electron volts, is tantalizingly close to energies beyond which charged particles can not be confined to the galactic disc by typical interstellar magnetic fields of 10 gauss.

The Ocampa's ersatz Caretaker had been the one to drag Voyager unceremoniously across the entire galactic disc from the Alpha Quadrant, and the prospect that the Nyma colony might hold some clue- any clue- toward reversing that jaunt had to be investigated.

Unlike the galactic disc, the halo seems to be free of dust, and in further contrast, stars in the galactic halo are of Population II, much older and with much lower metallicity than their Population I cousins in the galactic disc (but similar to those in the galactic bulge).